12Calc App Reviews

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HP12c. A great program which you can use instead the actual calculator. Saves space and you always have it on your phone. Tape too! Horizontal and vertical mode does works on both iPhone and iPad! This is a perfect application. Excellent support from developer in case you have a question. This works great with new Apple software. This app is perfect! I recommend it without any reservations! You will love it. Now you can have the HP12C with you on your iPhone and iPad.

The best!. I own 4 12c’s and have used them since way back when they first came out. They now all sit in my desk drawer since I bought this app. It does everything a 12c does and more, plus it does it much faster. Thank you Ernie!

Best 12c there is!. I’ve been a 12c user for a long time. It’s the best financial calculator there is and this is the absolute best one, just updated too. The functionality is perfect, it has the option of having a visual stack on the screen, and the record tape feature lets you check your work not having to redo the calculations. You can customize the color scheme too. Just the greatest version of 12c ever created, thanks!

12Calc. This is the best financial calculator which I have ever used. For example: The financial registers display above the buttons. You can get a tape if you want. There are associated programs where you can get results printed such as an amortization schedule. It has a conversion feature which I really find handy. It will even convert currency. The users manual is really great. I have recommended this calculator to many of my friends and many people at our office use it. I have tried several of these financial calculators and this is by far the best. Thom Cooper

Better than the handheld 12C. This is amazing. Better than having the actual handheld calculator. It’s worth it just to get the worksheets it includes. For example you can enter the basics into an amortization form and email the 30 year (or whatever you input) as a pdf. I had a question and Ernie e-mailed me back to help me. Highly recommend. Thank you Ernie for making such an improvement in the 12C.

The Best!. I have been using this app for many years and it has been accurate and dependable every single time!!

Amazing business power tool. My goodness! This calculator will knock your socks off as soon as you get it, learn it, and start using it. It is literally the best tool you can get if you have anything to do with finance, real estate, or business in general. I can’t thank the developer enough for bringing it to us at such an affordable price. Because it—bluntly and directly—blows away all the other 12c clones out of the water.

Excellent Calculator!. I have been using the original HP 12C app from Ernest Brock for years and started getting notifications on my iPhone that I needed to upgrade. This is my go to calculator, so I gladly paid the $2.99 to upgrade. Thanks Ernest for a great product!

Awesome App Great Value. Loaded this on my iPad and saved a ton of money Vs buying a calculator. ( I’m taking a class where I HAVE TO us a HP12C) This does the trick. Plus, when I first opened it I couldn’t get the calculator to cover the whole screen, ( could get rid of the “tape”) Sent a quick note to support, and got an answer in less than an hour. ( I didn’t check sooner so not sure how long it actually took, but it was FAST !) Highly recommend Mike B

Great App!. I use this all the time since installed. Seems to work just like the original HP12C, only faster. Once created, programs remain stored indefinitely, which is contrary to another HP12C type app I had where the program was erased after each use. One minor complaint is some of the color schemes make the keys difficult to read.

Improved on original by HP. I learned to calculate on a HP12C & this app has the same feel-only better and is now on all my IOS devices. Developer keeps app up to date.

Completely recommend. I was urged to get an app instead of buying an actual HP12C calculator and I’m so glad I got this one. I had a question for Tech Support and I got an answer in 15 minutes! In a way, calculator apps are pretty interchangeable but this app’s tech support really can’t be beat.

Great iPhone version of my favorite calculator!. After the CFA exam experience I am unable to use anything but a 12C. This app is a great iPhone version. Keep up the good work. Thank you!

Absolutely the Best Financial Calculator––and Best Developer. In an earlier review I gave this phenomenal app 5 stars but wanted to give it 100. Now, I want to give it 1,000. Without any doubt, this is the #1 calculator of its kind on the market in this CPA's opinion. I use this every day for a wide variety of professional and personal reasons. In addition to doing all the HP 12-C calculations, it has templates for leases, loans, time value of money, multi-year financial ratios, foreign exchange calculations, etc. I use the conversions feature to help me with calculations necessary when I fly general aviation aircraft. One of the best, most useful features is an electronic "tape," which, amazingly, can be e-mailed as a PDF file for printing if need be. This makes the app substantially more valuable than any physical calculator or any comparable app. When I bought this app for my iPhone, I expected to have to pay again for my iPad, but, no, I could download it onto my iPad for no additional cost. This calculator is outstanding. The developer, Ernie Brock, is a genius. He keeps making his app better and better all while staying ahead of Apple’s iOS changes that impact the functionality of the program. I recommend this fantastic app HIGHLY. It continues to get me through CPA seasons, and it makes calculations of pilotage and dead reckoning much easier when I plan cross country flights.

A 5-Star Emulation of the Handheld. Hats Off to to the Developer ! I’ve used the 12c since my college days in 1981 and this app is a real pleasure use. Such a natural transition to the digital world. Thanks for your work to keep everything tweaked and working well! G in TX

HP 12C. I have been using the HP12C for more years than I can count. It is super convenient to be able to use those capabilities on my iPhone and iPad. This ap is great and it keeps my RPN capability sharp. The additional power beyond the HP unit is amazing! R Baldwin

This is IT!. I have been an HP-12 user since forever. This app emulates all the features in the original hardware unit while adding many additional functions including a host of conversions. I use almost daily and find it to be always stable, accurate and reliable, while surprising me every now and then with a new feature I discover. THIS is why we but smartphones- everything you need, always at your side. Fabulous implementation of a wonderful product, only improved. Wonderful accomplishment!!!

My go to app when I wanna do FV calculations. I love this app. It’s so useful. Worth every cent. Great job by the developer. I do wish that the templates/worksheets were easier to use. I feel lost most of the time in there. Video tutorials would be helpful I think.

The essential financial app. Being a finance person, I could not possibly work without this essential financial calculator. It has all the necessary financial formulas and applications and a whole lot more. Kudos to the developer for the best performing financial app.

Great app. I started out years ago with Hewlett-Packard’s 38 E which was innovative and later moved to the 12C which continues to be terrific. The 12Calc app has all the features and then some and is my go to app for all my financial calculations. You can’t find a better financial calculator app.

A perfect 12C Emulator. This has been my go to 12C since I got my iPhone 6s (now on my iPhone 12). I use it daily. My real 12C has been collecting dust since (but I’ll never discard my decades old pal). This is THE BEST 12C app for iOS; very reasonably priced plus bonus functionality and great in-app help. Thank-you to the developer.

Love this app. I have always used an HP 12C in my real estate business and was so happy to find this app for my phone and iPad that works exactly like my old calculators! It’s seamless to transition to the app and I always have it with me now! Thank you!

Better than HP 12C. I received my first 12C over 40 years ago when I worked for HP. It was and still is the best financial calculator ever developed. Thanks I still have it, but I prefer this APP version of the HP 12C. The developer has taken full advantage of Apple’s application development to provide an experience that improves upon the physical version from HP. The new dark screen option is especially appreciated by those of use with visual challenges. Thanks, Ernie!

Awesome App. I LOVE this free 12Calc app! I’ve used it on both my iPhone and iPad for years and it just keeps getting better (which I didn’t even think was possible). Being a user of the HP 12C since 1990, I have a hard time using any other calculator, and because of this app, I always have it at hand. Thank you, Thank you Earnie for creating it for us! Greg. (P.s. This is the first app I’ve ever left a review of)

Great product. Works better than the rest.. I have tried several HP – 12 C calculators. This is by far the best. One great feature, is the calculator displays the financial registers. In addition, having the tape is a nice feature.

President. This 12Calc application is so convenient to use and is fully complete. It is my go-to calculator for everything! Many in-depth instructions are included. I use it very often and exclusively, and I find it incredibly convenient.

The Standard. I used to carry the 12c in my brief case, and for several years I have been accessing the same functions with enhancements on my iPhone. I use this daily, and I recommend it.

Great App!. I have used the 12-C for nearly 30 years. I don’t know if I’ll ever stop using it since my brain is now wired in reverse polish! Lol this app is a fantastic improvement over the HP in that there is vastly more functionality and built in help. Get it! It’s worth paying for.

Love my HP12C!. I’ve been using an HP12C calculator for 25 years. I was thrilled to discover this app which allows me to carry my favorite calculator with me on my phone. Superb app! Beautifully and accurately designed and executed.

Excellent hp12c emulator. Been using this RPN calculator for 3+ years and couldn’t have been happier with my purchase. When my old physical HP-12c finally died, I had no reason to go looking for a replacement. This app is all I need, at a fraction of the price.

This is the gold standard of Financial Calculators.. , Long before the personal computer, iPhones and the internet the HP 12C. calculator provided the answers to my financial calculations. Now my favorite calculator is as close as my phone, it’s always with you. This app has additional features not found on the original HP. The currency converter is very accurate and uses current exchange rates. Best of all, the app cost less than a set of replacement batteries for your legacy HP 12C.

Still the best HP12C App Ever After So Many Years! More so now with this latest update!. The updates on this app keep it at the top of my list of most used apps on my iPhone and other Apple devices. I have always owned at least three HP 12C handheld calculators since these came to the market decades ago. I still do today but now that I am on my iPhones and iPads most of every waking hour I find it so convenient to be able to click on Ernest Brock's 12Calc on my iPhones and iPads while working numbers on these devices. I have been a user of Ernest Brock's 12Calc from its first appearance and through its periodic updates with new features as Mr. Brock has again done with this superb 12Calc Version 2.3! I am now 76 years old and since these came out in the market I have used and recommended to family and friends both the HP12C handheld calculator and Ernest Brock's 12Calc app. I will continue to use and recommend these to anyone looking for timeless products that are classics in their industry. Good job, HP and Ernest Brock! Your excellent products enhance each other like supportive partners, which is how I view and use your products.

This is the 12c to get. while not as authentic looking as other 12c emulators/clones. This one is by far the best programmed, most complete, and most functional of all the ones available. The converter alone is worth the money. Paid and happy I did. I am a freebie junkie, so that is a ringing endorsement from me!

Retired. A great version of the best calculator of it’s era. I still have my HP12c and use it. Fantastic to have one wherever I am. This iPhone version is fantastic. I also have my original HP12c and use it every day.

Greatest Calculator. Ernest Brock has done a phenomenal job with this App. I first downloaded a version of this years ago when it was offered free for a short time. Then (I believe) HP asked Ernie to make some changes. I was extremely worried when I updated my first iPhone, because I thought I would lose this App. But it kept on working. Finally with my iPhone 7, I finally broke down to repurchase the newer (and improved) version. If you are a fan of HP-12C calculator, then you will likely find this App very intuitive, and I won’t go into describing all the ways it can be used. But some of the novel features include: * Currency converter, and current currency values can be updated whenever you want. *. A “tape” feature, so that you can see what an adding machine tape would show if it were part of the HP-12C calculator. And although I don’t use it for much more than a basic calculator with financial and real estate (loan, mortgage, PV, etc) calculations as I did for years with my regular HP-12C, I can honestly say that I use this App ALL THE TIME, especially during tax season! Finally, over the years I have had 2-3 emails with Mr Brock, who has always been prompt, honest, and provided me with valuable tips and help. Just what you want with a developer. So, stop reading, and go buy the App! You will find it very worthwhile1 2020 is here and my earlier review still stands. Great App. Great support. Go get it!

Best 12c app there is. This is the best 12c Calculator app available (I would know). As a finance major in college turned iOS Developer, I highly appreciate the amount of detail and effort That has been put into it.

Excellent financial calculator (and more). This app is remarkable for its emulation of my favorite financial calculator and a whole battery of additional features and tool hidden just under the hood. I love it and the appreciate the amount of effort put into creating and sustaining it.

Better than ever - HP12C, only WAY Better. This is by far the best value and usable financial calculator. You can use the help section and literally learn how to use an HP 12C! The worksheets make everything so much easier and useful for printing out results for the customer, like the amortization tables just to start! Buy this. You cannot go wrong!

My favorite everyday calculator. I've tried countless iOS calculators (seriously, I probably own close to twenty). 12Calc is a perfect blend of classic HP 12C RPN goodness with modern enhancements: worksheets for common tasks, unit conversion, help screens, and improved accuracy. It's also apparent the author is a total calculator nerd and this app has been a labor of love. If you're not in school and you aren't an aerospace engineer, a financial calculator is likely the better choice over a scientific for your day-to-day. And of the financial calculators available for the iPhone, 12Calc is the best of the bunch.

Formatting is problematic. You can’t get rid of the written instructions presented alongside the actual calculator if you are on the Ipad. It is distracting and unnecessary if you are already familiar with the application’s functionality. It primarily reduces the spatial formatting of the calculator itself. I assume that this was done to improve penetration rates among those individuals that do not know reverse polish notation. The problem is that the 12c caters to a specific community interested in advanced financial applications. If those individuals don’t have an interest in performing these types of functions, then they are likely not going to need to or be interested in this application. Get rid of the instructions.

Excellent. A 12C emulation that meets and far exceeds the technology of the original. I’ve tried many 12C apps over the years but this one is the keeper. The included tables are pure genius. The ability to amortize payments and see the calculations by month (and quickly verify or change my entries) is a huge time saver and I especially like the printable audit tape. I use this app nearly every day and have come to rely on it. So much that I’d be willing to subscribe to annual updates to ensure it remains available and is a sustainable project for the developer.

Better than my 12C!. I have used a 12C for over 30 years. In fact, I still have my original HP12C but don’t even take it out of the desk drawer now that I have Ernie’s version. It’s like a 12C on steroids! AWESOME! I love that Ernie continues to offer free updates to this already excellent app. I work in retail tech and can’t begin to tell you how many times I use this app to calculate discounts, pricing and financing options. It’s makes my job so much easier.

Fantastic calculator, problematic update. First of all, nothing beats 12Calc. There is no substitute unless you are using a real 12C, but then 12Calc has all the speed of your iPhone. The latest version, however, is problematic as the font is now white instead of black. Depending on your situation it can be very hard to see. I wish I did not upgrade so I could have kept the previous color scheme of black numbers on a lighter background.

Great program. I loved 12c before I retired, and even if I no longer use the. Calculator like I used to, i find this product to be fantastic and ell worth the money. I recommend it to friends and acquaintances. Saving output to pdf or to an email is a bonus.

IRR and NPV Function Bugs. I can do almost all the simple time value of money calculations with this calculator. When it comes time to storing values or retrieving values that are necessary for Internal Rate of Return or Net Present Value where I have to store values, the calculator fails and gives me impossible results. I believe this is a big; otherwise the documentation is not specified well enough.

Da best!. I have been a 12C’er since the beginning and am a true deciple of this incredible machine and app. I have owned may of the 12C apps and now only use this app which is clearly the best. Not even close. Da best!

Outstanding. I relied on an HP 12c throughout my career. This app, with its printable tape, help functions, worksheet features and conversion calculations has taken that old, reliable HP 12C workhorse into the modern age. Probably the most well-designed app in terms of functionality and usability on my iPhone & I-Pad.

features whether you want them or not. Miss being able to lock into landscape mode without having to go to phone settings to allow rotation. Have three HP12 C apps. Don’t find myself using this one as much.

Retiree. I love your product, but it has a few quirks that make it a little different than my original HP 12C standalone calculator. In any event, yours is the best one I’ve come across that is in app form. Keep up the good work! Looking forward to the upgrade.

Love it. They don’t make the 12cs or the 17bs like they used to, so I gave up trying. I miss having actual buttons to press but having it in my pocket at all times more than makes up for it. Highly recommend!

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Awesome Financial Calculator. This is my Go-to calculator. In addition to all of the functions of an HP 12Calc, it has numerous worksheet functions with full data tables. Awesome app. If you’re in the financial services or real estate industry, this is a must-have app.

Excellent app. This is a great app; only recommendation is to make the blue on the keys a shade lighter because it is sometimes difficult to read.

Absolutely crucial addition to my iPhone. Well done!. Having my hp12c on my iPhone is absolutely the best. Have used the calculator for 38 years, so very crucial for everyday use. Works smooth and faster than actual calculator.

Great tool, I use it all the time. I loved my HP 12C calculator and this is a great replacement.

12C. Excellent CONTINUING EXCELLENT

Math Man. Great app! Best ever!

12Calc. I’ve been using a 12c I bought in the late 80’s everyday for 30 plus years. This app is equal to and better than that actual calculator.

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Fantastic app!. Better than the HP12c and the updates keep it current.

Better than a 12c. This app does everything that the 12c does and more. It is well thought out. It functions with excellence. Love it!

Saves me $100 with no loss. I have had all sorts of HP fin calls and this is just as good without the up front costs and no batteries.

Great App. I have had the Physical HP 12c Platinum in my office and in my house for years, I find my self loving this and using the physical calculator less and less.

Better than the real thing. First, it’s a complete 12C on the iPhone Second, it has the lovely number displays telling you what’s in PV etc Third, it has a tape Fourth, it has lots of templates

Fully Functioning in iPadOS. I’ve tried several free and low cost RPNs, non behaved as well as 12Calc! Latest update to OS15 is super slick - split windows, hoorah, Cheers!

Best App. Love this calculator and use it daily. It’s just like the handheld physical version, but much more accessible!

Excellent!. Have used this for years and the developer keeps it current. Much appreciated! Leave your old, limited 12C in the drawer!

Better Than My Old HP-12C. I think this version of the HP-12C is better than the original calculator.

Like HP12c. I have really gotten good use out of this app for real estate and general use. It has been very reliable.

More than I expected!. I thought this would be just an emulator. Instead I got a great tutorial, examples, worksheets, printable results and more. Highly recommended.

Best RPN calculator. This is my favorite calculator, RPN or otherwise. Ernie Brock consistently achieves the highest standards in accuracy, excellence, and usability in all his products. Well done.

Last update. The app works well. The additional function of seeing the tape is very useful. Worth the investment.

Very Useful. It is so handy to have my HP calculator immediately available wherever I go.

HP 12Calc. Wonderful App- works well, updated correctly- get it for sure!

Awesome. Better than the original. Works faster than my 12c. My go-to calculator.

Awesome!. Absolutely the best, easiest to use, 12 Calc on the App Store. I have enjoyed using this for years without a single complain. Good job and well done!

40 year 12c user. I now leave my 12 C in the drawer. This app has all the features I love about the 12c and it’s on my phone

Great App. Super app! I’ve been using this app for more than a year and could not be happier with it and the ongoing improvements made by the developer. If you want an HP12C to carry with you, this is the best.

Like the calculator wish I could turn off the tape. Half the screen for a tape/help menu is ok, but could you make it so I can turn that function off?

12Calc. Ficou EXCELENTE com esse update. Muito Obrigado por aumentar o contraste do stack number!!!! :D Excellent!!! The higher the contrast of stack numbers on the right side is wonderful. Thank you very much.

Wonderful app.. Terrific app and developer is very helpful. This app and HP have made me a lot of money in the past 30 years.

The classic financial calculator, even more advanced…. The HP 12C, with modernized keyboard, a multitude of built in templates, and unrivaled accuracy of calculations, currency conversion immediate updates, and many useful templates.

Worth every penny and every dollar. This calculator is the best thing since tax laws and depreciation for calculating IRR and mortgage amounts on real estate transactions. You really need this if you ever bother to get in the CRE world.

Help. I have lost the ability to view app when I turn phone horizontally on iPhone... any remedy?

Best HP 12C calculator app. I use this HP calculator app all the time. It’s just like using my hand held HP 12C but more convenient and versatile.

This replaced my trusty HP12c. They did a great job of replacing the HP 12 c that I got familiar with coming out of college. With extra features and makes it even better.

Great App. This is a great application that I use daily. I don’t need to pull out my physical 12c to obtain accurate calculations.

Solid. Appreciate this app and updates

This HP 12c App is great!!. Great app. Been in the mortgage industry for 30+ years and been using the 12c calculator for all those years. Purchase this app to replace my old calculator and love it.

Godsend. Better than the actual physical calculator

Best HP12c out there. After 3 HP 12C over 40 years found 12calc Easy to use and lots of extras does everything I need plus more

HP12C calculator app. I have used an HP12C calculator for many years. Having this app on my phone makes it easy to access anytime and is excellent.

The best 12c. This is a great app. Works perfectly. Like the real thing but better since it has more!

Best. By far the best calculator app in the store. It is my go-to 100% of the time. I strongly recommend it.

Terrific, full-featured app. This is a wonderful full-featured terrific app with its own online handbook and manual. I love it. I don’t even have to carry around my HP 12 C anymore.

Great Program. Great program and additional functionality with responsive support.

Fully Functional. Im a die hard handheld 12c'er. In fact, my vintage one dates to 1987. The functionality of the app matches the original in all material ways. Well done.

Updates. Every time it updates it deletes my stored data (in memory locations) please notify before updating

It’s great. I love this app! I didn’t think anything could replace my actual 12-C but this has!

Nearly Perfect. It’s better than the real 12C. The only note is that the stock ratio lookup doesn’t work,but that’s seriously nitpicking.

Working great. Glad there are developers who offer these old HP calculators. And thank you for the ios17 update.

Glad I purchased this calculator. Wonderful app and great developer! I am pleased with both the 10Bll and this 12Calc. These calculators set the bar as far as I’m concerned.

Hp12c. Great calculator app. Wish I had this in the early 80’s. Thank you.

I LOVE THIS APP. For years I have not had to carry my 12C. I gave it away!. It's fabulous...I have it on my iPhone and iPad and no longer need to use the separate

Love having 12 c on my iPhone. Works well

Hp 12Calc. Love it, great computer. Been using the 12Calc for years. Have five of them at different locations. I appreciate your help very much. D Bohne

Improved version. Classic calculator with bug fixes. Thanks.

Great Financial Calculator. Mimics HP-12. This the best calculator for the IPhones of you are used to an HP-12. All functions and more. Tape feature is super useful. That alone worth the price. Works great on both IPhones and IPad.

Review. I still have the HP 12C but this is so much better, I use this all the time.