App Store
Sideline: Private 2nd Number
Set up a Sideline number and enjoy all the benefits of having a second line today. With Sideline, you can use your new mobile number for private texting, text chat, contact management, and more. We created Sideline to help streamline your communications by bringing you a second phone number with a complete set of features.
Create a new local number, send unlimited texts, and set up your own custom voicemail as you would with your existing phone line. Use mobile phone tools that help keep your conversations organized and help make sure you never miss what’s important. Your Sideline second phone number also includes convenient features like Auto-Reply, text reminders, and coordinated number management that can help you control your conversations on any device.
Use Sideline as a reliable private texting app as well when you set up a second number. Never miss a conversation with automatic chat replies if you miss a call. With your second texting number you can send unlimited SMS, MMS, or text messages and always stay connected.
Sideline is your app for convenient calling & texting. Set up a second phone line and start connecting when you download Sideline today!
SIDELINE FEATURES:
SET UP A SECOND PHONE NUMBER
- Your second line includes all the features you’d expect, from Caller ID to voicemail
- Set up a new phone number with a local area code
- All calls are cellular (not VoIP), so your second number is just as reliable as your primary one
USE A SECOND TEXTING NUMBER
- Send unlimited sms, mms, and text messages to all of your contacts
- With your second line, enjoy private texting at any time
- Access your Sideline number online and text from another device
FEATURES THAT WORK FOR YOU
- Auto-Reply moves a missed call to text so you never miss a conversation
- Set up a custom voicemail for your new second number and read transcripts of each message
- Transfer (or port) an existing number to your second line from another device or landline
SMART TOOLS TO MANAGE YOUR CONVERSATIONS
- Split a Sideline number between multiple devices to access anywhere
- Automatically set up a reminder for tasks related to a certain phone call
- Identify new callers, save contact details, and take notes after calls
- Save and reuse messages you frequently need to send
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SUBSCRIPTION DETAILS
Sideline is a paid service. Subscriptions are automatically billed monthly or annually to your iTunes Account and auto-renew unless you turn off auto-renew at least 24-hours before the end of the current period. Payments are charged to your iTunes account upon confirmation of purchase. You can turn off auto-renew or manage subscriptions in your iTunes & App Store account settings. Cancellations take effect at the end of the active subscription period. Any unused portion of a trial period (where available) is forfeited when purchasing a subscription.
Terms of Service: https://www.sideline.com/terms-of-service/
Privacy Policy: https://www.sideline.com/privacy-policy/
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Developer & User Discourse
joezen777 • May 6, 2026
★ 2
I’m using this to manage my church calling so I don’t ignore texts or voice on my main line, but can you do something about having your daily tips and tricks as push notifications? i think they’re helpful but i don’t want the distraction of thinking i got a push notification from a real person
Rob Gangsta • Apr 21, 2026
Even with their spam blocker I get about 20 spam calls a day. Now I’m returning calls from people who said they never called me. Junk service. The company then acts like they are surprised by spam on their public facing answer. Totally disingenuous.
Koolwhipmusigma • Mar 26, 2026
Good app but need to be able to mute text messages and use GIPHY
Yourannoyingneighbor • Mar 22, 2026
I needed an app to provide me a second phone number for my part time job. I paid for the subscription and set up my account. Before I was even able to make a call or text there was a restricted notification. I reached out to them for help. They told me I violated the terms. I NEVER USED THE APP! So how could I violate any terms and all I did was simply set up my account. They told time to reach out to Apple for a refund. Apple denied my request. So money was stolen on an app that I could not use. Both companies completely failed to provide customer service to right their wrongs.
Blake ohiov1969 • Mar 6, 2026
Great clean app
Ad272LLC • Mar 1, 2026
This is a great app. Everything works as advertised. 💯
Pattpatt1012 • Feb 24, 2026
Do not download this app they will charge you $31 even if you stop in the middle of signing up before payment was asked
Supergirl69 • Feb 24, 2026
$129 a year!!! WTF!?
tvm123987 • Feb 5, 2026
Nothing complicated about this! So intuitive, so easy to use! It’s crazy that it’s free! But I’m glad it is!
David C1543 • Feb 4, 2026
I’ve been using sideline for a few years now. It’s fantastic to keep work/personal calls separate.
The ability to auto send texts to missed calls is worth every penny. It ensures that I respond to every single call that comes in. It’s constantly getting updated and improving the service.
The ability to auto send texts to missed calls is worth every penny. It ensures that I respond to every single call that comes in. It’s constantly getting updated and improving the service.
Be2127 • Feb 4, 2026
This is extremely convenient, to have my work phone tied to my personal one. The calls sometimes don’t come through clear though, and sometimes I don’t get images when sent through text. Overall it’s been pretty good for the price
Dentist95 • Feb 4, 2026
I’ve been using this app since summer 2020. They’ve gone up in price.. A Lot. But each year they make good changes, especially if you’re an iOS user. They really try to mimic the user functionality of Apple. I do wish they could improve on reactions such as sending emojis and gifs. Other than that. It’s very useful!
Limiting calls • Feb 4, 2026
There’s a limit to how many people I can call, it’s frustrating
ganthonyvr • Feb 4, 2026
It’s a bit pricey to be honest but I rather pay the cost and have something that really works without ads, without pauses, and that it can ring anywhere in the city without wifi. This is great for me and I love using sideline. Oh and calls never drop or fail. Thank u very much
Noah DT • Jan 28, 2026
It does its intended purpose, cant complain.
Queen_Penelope23 • Jan 8, 2026
When I read the reviews before downloading this, I saw somebody say something about being banned for abusive language and they weren’t sure why, I thought I’m just gonna use it for to get authentication codes and stuff like that so I don’t have to worry about nothing. I haven’t sent a single text message or made a single phone call with this app. In fact, I’m barely even signed in, and already I am banned Until the 26th for abusive language. How do you get banned for abusive language when you haven’t used the app at all? Not a single text not a single call. This was a dumb experience. Thank you for wasting my time. Those are minutes of my life. I’m never gonna get back.
USMC Santiago • Jan 5, 2026
It’s been now 4 months & I still don’t have service. Renewed as returning customer & account paid in full with still no access. Reached out to customer service/tech support & seems like you are talking to AI, not a human. You ask a question & receive a question as an answer. When you provide info you are asked the same questions over & over. They expect you to respond within a day or case is closed and you have to start again. Now I am locked out of many things and this account because it was being used as this number. No one seems to want to fix or an actual human working there!
moosetickler22 • Dec 13, 2025
Need to pay for it. Would be nice if it said that before signing up and giving my information.
PrevTech • Dec 11, 2025
They recently implemented a spam filter that helps a little, but I get upwards of 10+ spam calls per day. All random numbers, they leave a 9 second blank voicemail. I’ve disabled notifications from the app and will just be adding a second line to my phone plan when my subscription expires.
Neslsonefc • Dec 2, 2025
This app is the best calling service I've ever used, just like a traditional phone. I have a suggestion for the web app: it would be great if they could enable calling features, not just texting.
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