Sideline: Private 2nd Number

• Sideline - Monthly plan — $14.49/month
• Sideline - Monthly plan — $129.99/year ($10.83/mo)
• Sideline Pro – Monthly Plan — $14.99/month
• Sideline - 6-Month Plan — $69.99/month
• No Ads — $2.99
• Sideline — $99.00
• Sideline Standard - Early User — $2.99
• Sideline Standard EarlyAdopter — $0.99
• Sideline Subscription — $14.49
• Voicemail to Text — $2.99

Last verified 30 Aug 2026

• Free to download
• In-app purchases: $0.99 - $129.99 per item

Last verified 31 Aug 2026

4.4 14722 ratings · App Store

1. 5/5Great option for a 2nd number! ⭐️⭐️⭐️⭐️⭐️

   I have been using Sideline for over 10yrs. So long in fact, I think I am one of the original customers. My account says “early adopter” on it. Anyway, this has been incredible for me. You get a 2nd line on your phone (I use it as my business number) so I have my main line and the 2nd line. The best part of this app imo is the fact that you text and call from the same app and you can see all of the communications in one place. Particularly helpful if someone says they haven’t heard from you or they claim you are not responding to them. All the calls and texts are in one place. You can set calls and texts to have different ringers so you know when your sideline is ringing vs your main line. You can set out of office messages and have them respond to every call and text. Mine usually say I am out of the office for a week or so and who to call in my absence. It just does everything you need it to. ⭐️⭐️⭐️⭐️⭐️

   wgman21 · 30 Aug 2026

2. 1/5Ok when it was free

   I started using this app when it was free as a local business number. When it was free it was great and I could tolerate when things glitched. It was free after all so I couldn’t really complain. FF to October it became a subscription based app and that’s where all the problems began. We signed up and immediately started having issues. Things from billing, calls not coming in, calls not going out and most of all LACK of customer service. After 2 weeks in December and 2 weeks now in February we were barely being able to get any customer support. We decided to pay a bit more money for another app that provides better service AND has an actual person to speak with if any issues arise. The worse part was having to pay an additional full month of service + pay to port out our number and being charged 4x by iTunes. YES 4 TIMES! You have to go through iTunes and hope their app recognizes what you’re doing. They can’t even process their own payments right then want to drop that dead monkey on apples lap. Because of that they tried to hold our phone number hostage. We will not recommend this service to anyone and now have to see how we will get back all the overages they robbed us of.

   Qban0124 · 30 Aug 2026

3. 1/5BAD BUSINESS MOVE!

   This app was pretty decent, with a few dropped calls. Recently, the caller id quit working. It only says "sideline incoming call". Calls were also beginning to drop. I use this as a business line. On top of all that now they want to charge for an app, that's less than 80% functional, uses my cell data/wifi services I purchase from a provider. If that's the case I could purchase an additional line for $10. The way sideline broke the news to current app users was through an ad/text message. So if you missed it, oh well. I prefer to go with an app I know I have to pay for upfront vs. a text from a free app. This action reminds me of how Netflix treated their customers by quickly increasing their prices, if I'm not mistaken they are still trying to recover. I have also been reading where they are charging $20 to port your number out. Well I brought MY number to sideline, with that being said if I am charged to port MY number out, I will have to take further actions, because it was my number to begin with. This is one of those apps you have to read the fine print. Be cautious with this app. Update: I decided to try it out. It was ok, not like it was but ok. Since this most recent update, the app crashes ALL the time! This is a business number. Meaning I get paid with my business!!!! If you charge for an app make sure it works! My business is just as important as this app!!

   CassondraMaria · 30 Aug 2026

4. 5/5Doesn’t really do what I hoped

   I used the Sideline app for only about one week. I did the free trial for one week and then I quickly canceled because I didn’t wanted to be charged. Here’s my review: positives and negatives. Positives: Great customer service. They have a live chat with a customer representative. Great user interface. The design is neat, clean, and a beautiful looking app. It could be used as a second phone number for business or for work or even for personal reasons. The sound quality is clear. Negatives: Calls are routed through cell data. The service poses around as being able to route calls through 3g technology (without the need for cell data), but this is not the case. Basically, it’s VoIP (Voice over IP) and pretends to function as a second phone number. You will need cell data to receive incoming calls. Without an internet connection or cell data, the service will not work. If you are looking for a second phone number, you’ll probably need an eSIM with a compatible device or a second SIM card. Costs too much. It should be $5.99 a month but instead it’s $9.99. At that rate, you might as well get a calling card. Also, I wasn’t able to send photos through texts. I am not sure if this is just a bug but I was not able to send pictures of videos, only texts. Overall, I could see this app being used for people who want a second phone number for business purposes. It’s a great way of separating family and friends from work or business related matters. This is my review. The app does deserve 5 stars though, because I love the design.

   Not A Fake Review :) · 30 Aug 2026

5. 2/5Stuck with it

   I gave 2 stars because I actually use it. But only because I have to. A few years ago I signed up when it was still free. Things were fine for a little while and then had to pay to keep it. Not long after that I started having the issues. But I paid and the number is on my business card. So I’m stuck. I’ve talked with multiple customer service reps regarding the issues. I’ve un-installed and re-installed it which caused me to lose 2 years of worth of data. But the problem stays the same. When I open the app, I have to wait at least 5 minutes (yes I have timed it) for it to un-freeze so I can use it. If I get annoyed and close it out to the re-open it, it’ll short out and close out on me anywhere from 5-20 times before it’ll finally pull up and then I wait another 5 minutes minimum for it to unfreeze. The only way to have it instantly work is by doing a soft reset on my phone. Then that first time of opening it usually goes faster until I close out of it, because once I close out of it and then re -open I’m starting over. I used to think it was just sideline but recently I downloaded a couple others and they do it too. Not anywhere near as bad but they do. But my cards have this number so I’m stuck. Unless anyone can recommend something. But I waste a TON of time waiting to be able to use it.

   ailgirl · 30 Aug 2026

3.8 62854 ratings · Google Play

1. 1/5

   works great if you are using it for work in the states, but if you travel at all, you will be logged out and blocked.

   Leshii413 Media (Leshii413) · 1 Aug 2026

2. 4/5

   good app, had it for over 5 years, one improvement i would suggest... when in no service area, have the message que up to send when service is restored. rather then a dead no send message, then it would be near perfect imo

   Gene Pategas · 1 Aug 2026

3. 1/5

   is not even free or a free trial. you got to pay just to get a second number. It is stupid. 👎

   Mattiah Ayesh · 1 Aug 2026

4. 1/5

   For what it provides and then call quality, this app is mid at best. I then tried Textfree and found it equally as bad. I finally had to move to Quo to get call quality as it should be and their app works better and so does the webui

   Kasa del Hallman · 1 Aug 2026

5. 1/5

   I used it for a couple months and then I started getting weird holds on my account unable to make outbound calls. and then the account was blocked. I used it for a business line so I wouldnt have to give my personal number out, and now im completely screwed, with clients having that number to contact me... thank you for terrible service and ruining my business! why am I paying for a monthly service and unable to use it... dont waste your time or money on this terrible app. I need a refund

   Sonia Portell · 1 Aug 2026

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