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
Nov 29, 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
Pete Z
December 2, 2023
I've been asking Sideline for years to include a search feature for call, transcribed vm, and sms history. I use Sideline for business and want to recall names, phone numbers, and messages of past clients and experiences. They say they want input but rarely add new features, and none of the ones I suggest. I might start looking for another app that does what I need.
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Jamie Martinez
November 3, 2023
I used to like this app. Was good for me to have a personal number along w my business number, w out a huge price point. But it has gone extremely downhill the last 6 months. There are service outages at least every 2 days. Pics rarely send, even on wifi. No calls come through. It just automatically says "missed call" when it didn't even ring. It's just really gone downhill. 😞 really disappointed.
9 people found this review helpful
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Pinger, Inc
November 4, 2023
Hi Jamie, we'd like to apologize for any recent difficulties you've experienced on Sideline. We understand how frustrating that can be, especially as a long-time user, and we assure you that we don't intend for such things to happen. With that said, if you email us at about this, our Support team will be there to assist you.
July 25, 2023
The app works good. My one issue is the contact list. The app REQUIRES your contact list in order to work properly. However Sideline, think about this: people want a second number to give out to folks who are Not friends, Not family, and usually business associates or one-time calls. So why would I want my personal Friend/Family contact list on the app?? It doesn't make sense. Adding your contacts should be optional, or have a completely separate contact list within the app.
66 people found this review helpful
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Pinger, Inc
July 25, 2023
Hey, we understand you'd like a separate Contacts feature within Sideline. Although we're currently working on other features for Sideline, we'll be sure to let our teams know about your feedback. In the meantime, if there's ever anything else we can do to make your Sideline experience a 5 out of 5, 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.

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