Sideline - Second Phone Number

Sideline - Second Phone Number application logo

A 2nd number for your smartphone—that’s your Sideline.

Sideline is the fastest-growing phone solution for businesses, teams, entrepreneurs, freelancers, and anyone who needs a 2nd number. Your second number comes with all the features of a regular phone number such as calling, texting, voicemail, and more. On top of that, everything works with your existing carrier network (instead of Wi-Fi), making Sideline the most reliable and highly-rated phone app out there.

The Sideline Subscription gets you unlimited access to all of the great calling, texting, and voicemail features with premium support. ($9.99/month or $99.99/year In-App Purchase Required)

WHY SIDELINE? – With Sideline, there’s no need to carry two cell phones, stay tied to a landline, or use your personal number for work.

HOW IT WORKS – Your two numbers simply live in different apps. Separate caller ID, notifications, and ringtones make it clear who’s contacting you—and on which number. 

CUSTOM NUMBER SELECTOR – Choose your area code and search memorable numbers like, “(555) DOG-WALK,” or combinations that are “JUST4U.”

NUMBER PORTING – Already have a 2nd number? Bring it with. Porting lets you transfer existing numbers to Sideline from another device or landline. 

CARRIER RELIABILITY – Unlike other calling apps that only work over Wi-Fi, Sideline uses your phone’s existing cellular network*. This gives you the same great call quality you get from your regular number. 

TEXTING & CALLING – Texting is unlimited. Calling works with your carrier plan so minutes (which are probably unlimited) get shared between your two numbers. 

SEPARATE VOICEMAIL – Greet callers with a professional voicemail greeting for your Sideline number. You can even set up multiple voicemails for any circumstance.

AUTO-TEXT REPLIES – Every missed call is a customer you may never get back. So Auto-Reply lets you engage customers with a text message whenever you miss their call.

TEAM NUMBER – Let your phone number ring simultaneously on multiple devices so your whole team can call, text, and respond from one line. Sharing a number improves company collaboration, responsiveness, and customer satisfaction.


VOICEMAIL-TO-TEXT – Get your voicemails transcribed and conveniently read them as a text message. ($2.99/month In-App Purchase Required)

VoIP CALLING – Make phone calls over WiFi if your carrier network doesn’t have a stronger cellular connection. ($2.99/month In-App Purchase Required)

SALESFORCE INTEGRATION – Access your Salesforce contacts and leads with Sideline. Then log calls and business communication so you can always be closin’. ($9.99/month In-App Purchase Required)

MANAGE MULTIPLE NUMBERS – Remotely manage multiple numbers and turn employee phones into an entire company phone system. (Enterprise account required. See for details)

TERMS –––––––

The required Sideline Subscription and all other in-app purchases are automatically billed monthly or annually to your iTunes Account and auto-renew, unless auto-renew is turned off at least 24-hours before the end of the current period. Payments will be charged to your iTunes account upon confirmation of purchase. You can turn off auto-renew or manage subscriptions in your account settings. Cancellations take effect at the end of the active subscription period.

Privacy policy & terms of use:

*Data and Internet connectivity are still required for general functionality. “Using your carrier network,” makes call quality more reliable than calls over VoIP or Wi-Fi. 

Hawaii, Alaska and the US territories aren't currently supported.

Sideline - Second Phone Number App Description & Overview

The applications Sideline - Second Phone Number was published in the category Business on 2015-08-25 and was developed by Pinger, Inc.. The file size is 118.63 MB. The current version is 3.1 and works well on 9.0 and high ios versions.

Like a well-oiled machine, we keep Sideline running with frequent maintenance and updates. For this version, we popped the hood for a full 15-point diagnostic inspection and made the usual performance improvements. So fire up your engines. On your marks. Get set. Go update.

Sideline - Second Phone Number App Tips & Tricks

Sideline - Second Phone Number Reviews


Horrible  Fearless956  1 star

They went from free to 9.99 a month ...


Terrible quality after their change  AwfulPirate  1 star

I have had Sideline for years and it worked very well. However, since they switched to a Subscription model, the sound quality has gone down the drain. Every call I've placed and received has been met with complaints of how bad I sound to them. They also are muffled and not very clear to me. I had signed up for a year subscription because the service was great before. I regret it now with how terrible the sound quality is. Improve it and I will update my review. UPDATE: After a few days back and forth with their support, nothing has been done. They look for anything else to be the cause of the problem- Wi-Fi, cell service, iOS update. They are not acknowledging that it's their system. I lose out on $70 and the cost of porting my number out. But I'd rather have two phones at this point.


greedy app developer  Vinbox123  1 star

I used this app before and it was great. Even though it came with ads, I have to say that it was OK but now they force you to pay an outrageous amount of money which is crazy. No thanks. When I can get a second number from Google from Google voice then why do I have to pay $10 a month for your app doing the same thing? Another greedy developer. That's why


Nice try  eBayisajoke  1 star

Clowns get u comfy using it for free then boom! Yep. Only $9.99 a month. Bye Felicia! I'll go down the street for FREE


Was Great now it’s not  amishpilot  1 star

I really liked this app! It worked well but now that’s it a paid service and outrageously priced at that, it will be deleted. Unfortunate.

Ty D. Smith

Disappointed  Ty D. Smith  1 star

They went to paid app. Claiming the ads would overwhelm. Why did you not do both and let the public decide if the ads were to annoying. They were an excellent service but at 10 bucks a month they are not that much better than most of the free services. Greed kills and I believe it will kill these guys.


Used to be......  AA_ronTX  1 star

10$ a month...!? I can add a 2nd line on my wireless provider for that much per month and just forward the calls. I don't know where they get the huevos to think leasing a # is worth that much.


Paid Subscription!!  ToMcpa  2 star

Not for a secondary number in the days of unlimited texting on my primary number!! Been nice knowing you till now 🙀


Disappointed  layo24  1 star

I can’t believe that I paid for an app that doesn’t even work. Will not be renewing my subscription. Back to Google Voice.

Island Life

Shame on Sideline! 😦  Island Life  1 star

Shame on Sideline for abandoning longtime users and attempting to force us into a subscription. Sideline was okay as an ad supported app, but pathetic at best as a paid app. The bulk of the 5 star reviews are for the old free version of the app and should no longer be considered representative of its quality. Look at your reviews - there’s no demand for a forced subscription, so don’t lie to people who gave you a chance and even recommended the service to others. Sideline deserves zero stars for the nonsense PR responses they’ve been pushing. Fellow users: No way is what Sideline is offering worth $10/month. There are much better options out there for your money. Plus, Google Voice is FREE and has become even better recently! Sideline: You guys missed an opportunity to grandfather in a group of users that could have been cheerleaders for a premium optional subscription. Folks who were using the ad based Sideline should have been treated as early adopters and shown some loyalty (instead of the frankly insulting offer to pay $70 a year for what had been free). I hope you guys reverse course on the forced subscription, but these days it seems like everyone is ready to power through with poor decisions.


Not paying  PF265  2 star

I liked the App till you started charging monthly fee, plenty free apps out there. Thanks


Paid service  zi0oi  1 star

This app used to be good when it was free. Now you need to pay to use it. There are other apps for an alias number.


Super useful & simple  Olaf972  5 star

This app gave me a free second phone number that works with my existing carrier plan. I dropped my old landline at home and saved $20 a month. Nice! Thank you Sideline!

Slopasaurus Rexamachismo

Constantly Improving  Slopasaurus Rexamachismo  5 star

Keep up the good work!


This app is great!!!  ginageee  5 star

This is a great app! It’s helped me separate out my work and personal calls. Thanks to Sideline it’s easier to figure out if I need to answer or if I can just let it ring through


Awsomeee app  Jaideepkatkar  5 star

Totally worth the money.....


Ahora es pagado. Ya no bueno.  Wsan3152  1 star

paid is no longer good


Great stuff, Sideline!  Nick74952  5 star

This app is great. I get a dedicated work number for only $10 per month. I used to have to carry around a 2nd cellphone that cost like $50/month. Plus, Sideline has more features and functionality than my regular number. It’s rad. Keep up the good work, Sideline. The new UI is really slick too.


Nope  Faticortez  1 star

I will not pay for something that was free before.. when I can just get another free app


Was the best app  Luisitonyc  1 star

Now its not.

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