Sideline: Second Phone Number

In-app purchases
62.6K reviews
Content rating
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About this app

Sideline gives you a premium second phone number with reliable text and call quality you won’t get with other calling apps. With unlimited calling and texting, your new second number from Sideline will work just like your first—no wifi connection needed. Just pick your local area code, then text and call from wherever you are using your phone’s cellular signal. Sideline was created by Pinger—the makers of apps like TextFree and Index. Pinger apps have been downloaded over 160 million times and powered over 200 billion text messages.

Sideline is one of the most trusted calling apps that tens of thousands of people rely on daily to manage their calls and text messages separately from their main phone number. Sideline’s patented technology powers reliable, carrier-level call quality that guarantees your phone calls and text messages will go through on time, every time.

Send text messages and place phone calls without wifi while keeping your personal phone number separate. Whether you’re using your second number for online privacy, professional services, or simply to keep communication organized, Sideline gives you the tools and features you need.

With Sideline, you’ll get more than just a second number; you’ll get a full-featured calling and texting app that lets you organize your contacts, reply automatically to missed calls with a text message, and much more. Download Sideline today!


Second Number + Local Area Code
- Get a local phone number, or select the city and area code of your choice
- Call without wifi! Sideline phone calls and texts work with your existing cellular connection
- Enjoy voicemail, caller ID, sms texting, and premium call quality
- Get unlimited calling and texting, even when you’re offline

Powerful Communication Tools
- Automatically reply to missed phone calls with a customizable text message
- Share photos, videos, and GIFs from a reliable 2nd number
- Assign “Favorite” contacts for ease-of-use

Full-Featured Second Phone Line
- Create a custom voicemail greeting and read transcripts of voice messages
- Calling and texting tools available on multiple devices to stay in touch at any time
- Identify new callers, save contact details, and take notes about your conversation
- Incoming calls are clearly labeled as Sideline calls, so you know when you’re receiving a call to your second phone number, and not your main number.

Sideline gives you everything you have with your primary number and more, in a second number calling app that you can trust to always get the message across. Download today and begin your second phone line experience with a free 7-day trial.

Privacy policy & terms of use
Updated on
May 24, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App info and performance
This app may collect these data types
Personal info, Messages and 7 others
Data isn’t encrypted
You can request that data be deleted

Ratings and reviews

62.4K reviews
A Google user
October 12, 2019
I have been using Sideline as a biz mobile number for 3-4 years. I must say, I am very pleased with the service overall. It has been reliable and easy to use. There are some things that should be addressed: 1. The app REALLY needs a Search function. I cannot look up texts or calls without scrolling through and opening every conversation. This is inefficient. 2. If a text or call is received through Sideline while on a standard network call, it disables the speaker function. Otherwise Great!
33 people found this review helpful
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Pinger, Inc
October 15, 2019
Hey there Kirk, thanks for reaching out. We're so happy to hear that you're loving Sideline. As for the search function, we'll be sure to let our product team know that you want to see a search functionality. Also, if a quick uninstall/reinstall doesn't help the calls, let us know at
A Google user
December 9, 2019
No calls EVER seem to come through, regardless of being on wifi or off wifi, it just shows Missed Call. It would also be nice to have export function to be able to back up texts to a .txt file with a click. Video quality is not up to standards so don't bother, use your regular phone instead. It's really okay to use as a second text number. I only seem to be able to make outgoing calls, not receive them. I would love to see improvements made @the price you're charging.
15 people found this review helpful
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Pinger, Inc
December 10, 2019
Hey, we're sorry to hear you're having trouble with your calls. We connect your calls through your cell carrier so they should be of the same quality. If they aren't, email us at and let us know. As for the export, we've passed this along to the product team to evaluate as an upcoming feature
A Google user
October 2, 2019
Going on my 3rd year with Sideline. I like being able to give out a number that's not my "real" number, and having seperate text and call sounds. I've never had a problem with call clarity, yes it takes an extra second or so to connect, but that's not a big issue for me. Blocking numbers is easy, but if I accidently block one, the process to unblock is too complicated. I have had issues in the past where my REAL phone number was showing up instead of my Sideline number. Overall I'm pleased.
14 people found this review helpful
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Pinger, Inc
October 2, 2019
Hey Beth, we're happy to hear that Sideline is working well as a second number for you. If you continue to have any issues in the future, let us know at

What's new

Better. Faster. More Reliable. That's our motto for every update. And in this release, performance updates make Sideline all of those things.

If you're enjoying the app, please leave us a rating or review. Need help? Email us at: