JB4 Mobile App Reviews

A must have. It’s an amazing app! A must have for Jb4 owners. You can change maps on the fly via Bluetooth, in case you can’t find e85 and have to run on 93 only, it’s a cinch to lower boost a bit so you don’t damage your engine! All the different read outs are very accurate as well!

Worth the buy. You might think it’s a lot at first but when you actually use the app and see it’s capabilities it’s all worth it.

It’s more than performance. First off, this app is amazing. It brings the driving experience to a whole new level. Not only that, but just a few days ago, a mile from my house, I blew an upper radiator hose. With the aid of the jb4, I was able to monitor the coolant temp (not available on a stock 335) and safely drove home without fear of overheating. I installed an iPad mini, landscape view, above the center vents and very happy with everything. It’s just awesome, highly recommended.

What is up with everything going mirrored image?. What is up with everything going mirrored image? And then freezing like that until you delete the app and reinstall it?

Connecting issues. I have recently got a radio and I downloaded the JB4. But its not connecting at all. It’ll keep searching till it eventually says something about connecting error. What could this be? Please help ASAP ?

Amazing App. This app is awesome, can change between Methanol Injection and standard all from the phone. Can also log data for tweaking purposes. Clearing codes paid for itself already once. Great piece of kit!

Works as expected. I use this app to set and monitor my JB4 install. Easy to install and configure, works every time.

It’s very expensive app / no partial refund for one month use.. Make sure you are dead set on keeping your JB4 kit since this app is none refundable once you buy it. You won’t be able to transfer it to another user like your friend also. So If you decided to sell your new JB4 tuner kit, count this app cost as your extra loss.

Let me name my maps. Great app and has worked for me reliably for the 9 months that is r been using it. It’s missing an important, and likely easy to implement, feature. Let me custom name my maps. Every time I got to switch, I have to go find the reference for the map set I have and read through it. It makes the on-the-fly switching way more painful than it needs to be. I’d happily have submitted this as a feature request but the support links in the app page just push you to the JB4 forums. That’s not the same thing.

Give Me My Theme Back. I've been a JB4 user for over 2 years and have thoroughly enjoyed it. That all changed with the latest app update. Upon automatic update, my old gauges and layouts were wiped out. Now, I'm forced to use one specific style of gauges, the text on the gauges has gotten MUCH smaller and it's hard to read due to the colors I'm now forced to use. Please add the other UI customization items from the previous version or allow us a way to install the previous version of the app. Thank you.

Superb customer service. I am on my second vehicle with JB4 and I can’t say enough about their customer service. Very responsive and quick to answer questions or resolve issues.

Screen turns off on iOS26. Couldn't find another way to reach out to the developer. The app works fine, however since updating to iOS 26, it no longer keeps the screen on when you're using the gauges, which defeats the purpose of gauges. On previous iOS versions, the app would keep the screen on and the phone unlocked while using it so you could view the gauges and record logs. Please get this fixed or add a setting to force the screen to stay on!

Response. Had a good response time from the team with the small issue I had. Hope I can help test out any new features you will offer for the q50.

iOS 26 update won’t allow app to stay on screen?. App works as expected, but since iOS 26- app no longer remains logging or showing data past lock screen timer? Please update to allow use during driving! Thanks

App Usability.. My JB4 app has always been useful and not giving me many problems. However, as of today they issued a mandatory update for everyone’s app which completely changed the whole layout and now my car is barely drivable because my JB4 is messed up. No company should ever force an update. It should always be a user option. Literally, the whole entire layout of the app changed.

Awesome data logging. Love the real time data logging through your phone via Bluetooth. Makes things a lot easier to monitor. I always have it on whether I’m driving to work, going to the gym, test driving the car etc. Much more convenient than a laptop!

Just downloaded and not happy. Purchased the app a few years back when I worked for a BMW performance shop and hadn’t used it in quite some time. Downloaded today so I could interface with my wife’s car and I have to pay for an app I’ve already purchased once?! The whole reason I paid for it the first time was so I could use it when I wanted. Honestly you’d think if you bought a $500+ programmer and paid the extra for Bluetooth connectivity bringing the total over $700 the app would come with it.

Yes. App going to sleep fixed in the last update

New Stinger User Suggestion. So far I really like the app and the JB4. The app connects quickly via Bluetooth and I haven’t had one issue after a week of use. Something I’d like to see is multiple gauge screens to scroll through, similar to the Ultra Gauge app if anyone is familiar. That way, my most used gauges are on the first page and gauges I reference less like map, temps and waste gate data could be easily accessed by a swipe rather than having to temporarily reset a more utilized gauge.

Worth the money!. Everyone at JB4 has been extremely helpful and quick to respond. Never had a aftermarket tuning company respond so quickly. You can tell they value every customer! Would 100% recommend if they have tuning for your platform!

Works…but. So the device and the app work pretty well. I have the device for a 2022 ford edge 4cyl. Definitely has a much smoother drive with it on, mileage is better. Easy to install and app is simple to use as well. My issues are that I’ve had to purchase the app three times now, because I go through phones like crazy, and apple doesn’t seem to want to save information very well. There is sometimes where I feel like I have to hit the quick mode I want after the initial start up, because it doesn’t feel like it’s giving me the smooth power, but when I hit number 3 and it loads then it’s good. But I think sometimes during the initial start up there is some connectivity issues. Might just be the phone, since they are just monitoring devices for the government.

I Want A Refund. This app does NOT work on the iPhone 12. The jb4 doesn’t even show up in my Bluetooth list. I keep getting an error message saying the pin is invalid but it doesn’t even give the option to input the pin (I know my pin). If you have the new iPhone it’s not worth it. I’m requesting my money back from Apple support smh Gonna get a data cable instead!

Just needs a little tweaking. Should be a little more detailed on the maps and should consider making Apple CarPlay compatible. Other than that the app works great

Good support. I like the guys over at burger. They are pretty responsive on the forums and provide continuous support for the app. Just send them your logs on the forum and they will help you as best as they can. The module is a boost controller so much of the tuning will be dependent on the fueling, spark plugs, and small adjustments in the app. It’s basically the same stuff bmw is keeping from you behind a paywall. After all their engines are b48s,b58s and for the big spenders s55s . This beat paying bmw an extra 10k - 15k for a trim and horsepower increase.

Great app and a must have with the JB4. App is freakn awesome! So much easier to work with a phone than a laptop. Please change the background color as it’s too dark to read and if gauge selections can be adjustable from 1 to 6 gauges this would make it even friendlier to use.

Great customer service. Love the app, but the customer service behind it even more !

Good platform- fast response to issues. The support team at the JB4 mobile group exceed expectations when it comes to turn around time for solutions to bugs and problems. Good interface for the Burger hardware.

Could be so much better.. Very buggy. The email only support is very frustrating. I also highly recommend not purchasing the methanol kit until they can get lines that don’t leak and fill the trunk up with deadly and expensive methanol. The gains are good but I like peace of mind. I used to be an advocate for jb4 but with all the money they are making I don’t see it being applied to research and development.

Won’t stay connected. I love this app, but it has a quite a few bugs. It won’t let me stay connected to the tune for some reason even after restarting my phone and checking for updates for the app other than that, I’m satisfied, but please fix these bugs.

Gauges and some preset tunes. So I’ve had the jb4 app and tune in my 2019 Volkswagen jetta s 1.4t 6speed since April. In the beginning all the tunes were there but now for some reason a few are deleted from the app. Also I can’t see a lot of the temp guages. I believe the only one that does work for this car is the water temp. It would be awesome if burger motorsports would do a software update for my car!! There hasn’t been any since I’ve had the app. Other than that tho I absolutely love the jb4 tune and app. It makes such a difference from stock!!

Product Improvement Request. Have only been using for a few rips so far and don’t have any major complaints, but immediately as I’m driving I notice a few things that in my mind should be in this app already and can’t be that hard to build out… 1. Name my custom maps 2. Let me see one or a few gauges at a time (screen layout) 3. Apple CarPlay!

Using this app & Bluetooth wireless connector. While using this app & Bluetooth connecting, having issues some errors of sings, ignition problems, freezes up, or can’t read the gauges properly. I would not recommend JB4 tuning. Low quality product

Needs an update. App cost $28 but hasnt been updated in a year. Burger motorsports is such a great company, with an insane amount of JB4s sold and installed today. Please make updates to the app, my biggest issue is the constantly disconnecting from my bluetooth.

Car Play integration please!!. The new update brings the app to the 21’st century. It’s great and let’s you choose exactly what parameters you want to see and match the colors to your car’s theme. Only thing we need now is Carplay integration! There is an app developer who created exactly that. It’s an app called “OnTrack”. Let’s get his technology unto JB4!

4 star for now!. App is easy to use but it will be more useful if it have car play compatibility!!! Having all that info in ours car infotainment and make changes on the fly whit out touching the phone will be fantastic!!!! Other than that i love it!

It’s good, but could be better. The app works well. I would love it if it supported apple car play, so the gauges could been seen on the cars touchscreen, instead of the phone. Either way, great app so far, no issues.

Car Play Support. Please develop car play support so we can monitor gauges on our car screens!

Great and fast Customer service.. I had the opportunity to resolve connectivity issues on two separate occasions. Both times customer service not only responded quickly but also addressed my concerns very fast. Two thumbs up to Miles Woodrum.

JB4 is garbage. It’s so nice of Burger Motor Sports to hide the $30 charge for the iPhone application after you spend $150 thinking you’re good to go. And don’t try to update the firmware because that will just ruin your unit.

It works most of the time.. I’ve been using this app for about 3 weeks now and have had to delete it and download it again twice because the text on the goes inverse for no reason and won’t switch back. Other than that it does what it’s suppose to do.

Problems..Good…But Problems. Have had my Jb4 installed for a couple days now and it’s been a blast. The problems lie mostly in the app. Most, as in 90% of the display options such as rpm, gear, speed, etc. have not worked for me. But, things like boost, gps speed, ecu boost, oil temp, etc. have worked but will stop after a certain amount of time. Customization is great, but the graphs don’t work even after doing a log. Have a check engine light on, probably from my high flow cat for my F30. But, the app says I have no codes showing up so I can delete them. Watched every how to vid and no one is addressing my problems..maybe this needs another patch

Wonderful. Love the app and JB4 all together. Only thing to make it better is to make it Apple car play compatible so I can watch on my big screen rather than looking down at my phone.

New UI Goes Hard. App looks fantastic after the update. Been going on a year since I installed my JB4 in my Giulia and I’ve been loving it—changing maps on the fly is great and the logs are insane. Love it

App function. I recently purchased this and for a product you can diy; it sure doesn’t come with a lot of information for the user. I went into a bio settings and it was just a bunch of stuff I don’t understand. Would be nice if I didn’t have to google all this information. Also, the app inverted and wouldn’t change back to the original position. Some help would be greatly appreciated.

Most of the time. I’ve been an advocate for the company for many years. Great products. The only issue with the app sometimes the gauges will freeze whether on Bluetooth or OTG connection. I mean it does work most of the time. As intended.

Gauges freezing. I actually love the app and the capabilities are nice. You can do a lot. My problem is the app keeps freezing when u have the gauges open after doing a pull. I have to toggle to the maps menus and than back to gauges for them to show live feedback again. Maybe this is something I can change in settings??? If so would change to 4 star review

Only one thing left to improve!. Great app for a great product but it really needs to be integrated with Apple Carplay. I’m hoping for the upgrade soon. Then I will switch my rating to 5 stars.

Screen not running. Screen does not stay on when driving around have to keep touching screen or re opening screen

Does not work well.. App constantly cannot see devices, gauges constantly stop working randomly. Since last update cannot connect to tuner no matter how much troubleshooting. For how much this device cost and then to have to pay extra money for the app and then it hardly works (1 year or use…) I’ll be selling this crap tuner. 2019 Raptor.

Incredible Support. First of all, having Bluetooth connectivity for the JB4 has been a valuable enhancement. When I had a problem with the BT hardware, I sent the unit to Donnie and after a few email exchanges, he fixed the problem and sent me a replacement unit. The app quality is outstanding and support all the more so. It is amazing that there is such an outstanding product for a niche application. Just get it! If you already made the plunge to get a JB4, the Bluetooth interface will greatly enhance your investment.

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Doesn’t work after upgrade.. Won’t work. Set up by prof. car electrician. Troubleshooting no go. Let’s see the quality of their customer support. I’ll post my final review after customer service

Awesome!. If you have a JB4, this app is worth every cent. I wish it would log real-time clock, GPS speed and g-force into the downloadable log files though.

Works as advertised. Works well but would be good to have a CarPlay option.

CarPlay integration. We really need this all on CarPlay

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more optimization. Needs more iphone x optimization

App keeps showing in Mirror image. Not sure if anyone else is having an issue, but I have to keep deleting the app and reloading as when I turn on it keeps giving me a backward or mirror image. Will update rating when this gets figured out. I’m using an iPhone 14 pro max.

CarPlay support. I’d really like to see CarPlay support added as well as an updated, cleaner UI. Works well though sometimes it’s finicky to get connected. Still insanely convenient to switch maps on the fly. The connect kit really is a must have for any jb4 owner.

Great app. The app works well and connects on every launch. Wish it read more codes on the Infiniti’s

Car play. We need car play support please

Connection. Love JB4 and everything about it so far, with the new update I cannot seem to retain connected to my device. I’ve reconnected everything and reflashed but still has not changed anything

It works, but it’s lame.. Giving this a 2-star rating because quite frankly for the price it’s very disappointing. It does what it’s meant to do, yes, so it’s functional. But the interface for settings is crappy, there are UI glitches (i.e. can’t see the rpm limit value), it often crashes when I change my map, and honestly... my biggest complaint is, for the price... make this compatible with Apple Car Play! It’s literally a car app, and we all know it’s illegal to use our phone while driving, so this app is literally asking us to not follow the law in order to use it. I’ll gladly update my rating if they either give it support, but until then I find this app overpriced... but then again, that’s what happens when there’s no competition.

Really useful. It's a must if you have the JB4. I use it daily to clear codes or change the map settings. When I had issues, technical support was awesome everytime. Thanks for the good work guys!

Doesn’t work. I install it with the wireless app with iPhone 11. Worked few months and I tried to change map for valet and since, the app doesn’t work. I tried to update and it’s even worse. The car don’t want to go faster than 20 miles/hr. And check engine is on. I’ve tried every things on n54tech. I delete the app and the firmware cannot download. I don’t recommend. I cannot connect the wire the car don’t go. I bought it for notting. Its big waste of time and money. A good mecanic order it and installed it. And when he order the wireless kit, they sent the bad kit for my car and had to complain seriously to get the good kit. Never again for me.

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Country Check for Passive Delete?. No thanks.

Great app. Wish it was included in the cost of the JB4Connect Kit, but anyway, it's a great app. Can do all the stuff the burger software on the PC can do plus more. Occasionally the readings glitch, but I'm sure Donnie will figure out why and fix it.

Don’t waste your money. Nobody at this company can be bothered to return an email. $28 for an app that doesn’t work. Don’t waste your time with this garbage. Buy a real tuner from ecutek they’ve actually provided me more support for this product than the actual company. HORRIBLE SUPPORT!!! DO NOT PURCHASE!!!

Not working properly screen upside down and backwards can't read anything. I just bought this app I can't read anything it's all backwards upside down can I get some help please?

Works Great!. It works great, but it’d be better if it worked in Apple CarPlay.

Essential app. Great app for the BCS JB4 users, but please drop the blue font with black background... its nearly impossible to see

Can’t connect to server. Says unable to connect to service can’t even log into my JB4 account

AMAZING. Best option out there. Everyone loves it, except all the v8 guys (mustang)i blow pass! This defines, on the fly tuning

Limited gauges. As JB4 uses odb2 and clear codes I would think I could get temperature gauges another OB2 readings for the price

Can’t save. Can’t save adjustments be cause there’s no way to get keyboard to go away

Outstanding support app for JB4. Don't know how I operated and tuned my car before this. Outstanding realtime display of what you car is doing and make tuning a breeze. Thanks for the outstanding product and keep up the good work.

Username/password server fails. The app was GREAT until the username/password was implemented. Now I can't use my iPhone turned iPod for sole purpose of using it to connect to JB4 unit. Remove the username/password and this app will gain back its 5 star rating.

Works great!. Works great with the JB4. Connects and works without hiccup.

Need to buy Bluetooth wireless connection. Didnt know i have to buy a addittional 140 dollar Bluetooth connection that i have money for so now im stuck with this app i spent 30 dollars on that im not gonna use

IS THIS APP STILL ALIVE?. No updates whatsoever? Paid $30+ garbage

Must have app for JB4 users. I really like this app and it works really well for the JB4 Connect Kit. The app should be included in the JB4 Connect Kit, but whatever. My issue with the price doesn't take away from how well this app works and how much easier it has made data logging and monitoring the JB4 for my M4.

JB4 apps. I good like to return the JB4 apps

Awesome in every way. A++

Water temp and oil and trans read in F only. Hi Thanks for the update But i notice that JB4 app version 2.5.1 Water temp and trans temp still showing in F instead of C Even when units conversion option is selected Only one that goes to C is the IAT Will this be fixed soon? , please fix

Great support. The owner emailed me to help me with my problem that blew me away.

Plug and play out of the box. As with everything BMS makes, this is amazing. Works perfectly after a five minute install. Updated firmware on first login. This would have cost thousands a few years ago! Love you guys!

“Must buy” if you have JB4!!!. I’ve got an LCI E90 335i w/the N55 and I wish I got this app sooner. Using the app is so much easier than steering wheel controls. Highly recommended!!! Miles of the support team was super helpful and prompt! Highly satisfied with my app purchase.

Refund. I’d like a refund please as I’m returning the JB4. Had for less than a week, and car has several error/malfunction messages now

Wont let me create an account to connect. Please help? On iOS !

Great app with great support. Support behind the app is awesome

False advertising. Does not work with the JB for USB. Doesn't say that it does not either. The day before Bluetooth was not compatible with my day before and there was no clarifications online about that either. Overall such a waste of time trying to get this to work.

Great app. Love the app just wish it had CarPlay capability!

Stopped working. Since the update the app will not connect to the jb4. Don’t waste your money till fixed!

App doesn’t work on my iPhone 13. The app isn’t working on my phone but works for my android

Does what it says.. If you run JB4 this is a no brainer.

Jb4 Is No Joke Lol. It's a big yes For me !

Major flaw. Needs security. There is nothing to stop someone else from connecting to your car and changing crucial settings causing damage.

Great app. Makes logging and using the JB4 much easier. I have the Rev2 kit on my car and could not be happier!

Worst customer service. Won’t call, only email. Takes a whole day to get one line replies. Going on day three and still can’t tell me why I’m having engine lights and issues with app.

Why I hate this app. You can’t connect ever wouldn’t recommend to anyone

Awesome. It's money well spent!

Not working. Downloaded, paid … app will not login!

Good when working. Installed for two days now the Bluetooth connection no longer works at all.

App double charged me. Charged me $52.98, not advertised price. Can you please explain? I’ll correct once answered

Waste of money & support is useless. Don’t waste your time or money

Great app but needs CarPlay support. CarPlay support would make it perfect!

Great app. Recommend for jb4 owners BUT...... I belive this app needs to allow you to choose how many gauges you can display. That would be perfect!! Other than that the app is great works perfectly and would recommend it to every jb4 owner.

Jb4 2020 Kia Forte gt. I’m in love with the jb4 and having a blast on map 2. It’s a huge difference from stock. Customer service has been fantastic as well. App is very easy to navigate through. Would definitely recommend going through them.

Won’t go past “handshake “ on either of my devices. On second unit and no change. At a loss

Fraud. This app is a joke. Charged me over $30. Already called my credit card company and for a non payment and fraud by the app creator. Don't buy it!!!!

CarPlay integration. The app is great, but it would be really nice to see CarPlay integration without having to use a device to force CarPlay or android auto. Please try to integrate that.

Good app, some flaws. Good app for data logging. No longer need computer jb4 app after. Yet there are some bugs and the 0-60 and 1/4 mile are no longer a feature. If they fix those then I would give it 5 stars.

Great tool. Love using the app. Updates I hope to see. A gauge for fuel economy (miles per gallon). Add more of the steering wheel controls in the app for easier control. Also a eco map to maximize fuel economy, similar to eco and sport on modern BMWs.

Doesn’t connect. The app does not connect to the jb4, it keep asking to select the type of engine

App needs updating. This app needs an overhaul from top to bottom. The UI is very unfriendly. For the price of the app, it'd be nice fnthe developers atleast made the app look good