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Sideline.: 2nd Phone Number.:

Sideline.: 2nd Phone Number.:

Receive SMS active online

630 ratings
166 reviews
💼 Business
📊 Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • January 3, 2023
  • June 24, 2026

Features

Developer

Second Phone Number & Texting LLC
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🧾$5.99 - $119.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐166
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❓5 answered
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About

This app provides a private, secondary phone number on your existing device, allowing for unlimited calls and texts without an extra SIM. Protect your primary number from spam and manage work-life balance effectively with flexible calling and messaging features.

✓Get verified USA phone numbers
✓Unlimited local and international calls
✓Send SMS and view message history
✓Send FAX worldwide
✓Block undesirable phone numbers
✓Name Number feature for identification
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What users say

Summarized from real user reviews of Sideline.. Based on 630 reviews and a 4.6/5 average, it highlights the 7 positives and 4 negatives reviewers mention most about this Business app.

Positive things

  • 🚀Efficient and reliable
  • 🔒Keeps personal information private
  • 👍User-friendly and intuitive
  • 🚀Seamless call and text experience
  • 💰Affordable international calls
  • 🌐Convenient for travel and remote work
  • 🔑Secure second line for sensitive activities

Negative things

  • 🐛Occasional connectivity issues
  • ⚠️Unreliable customer support
  • 💰Subscription fees may be a concern for some
  • 🔍Limited feature customization options
See all reviews

What's New in Sideline.

1.4.27

June 24, 2026

updated backend for better voice connection

Subscription plans

1 phone number

1 number for one month for calls, SMS and FAX

$9.991 Month
3 Days trial
How to cancel Sideline. subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Totally worth it

If you want to keep your personal and professional calls separated on one iPhone, this app is a game changer that cuts out the cost of extra SIMs and hardware. It keeps your private number private while offering dirt-cheap rates for calling the US and Canada, making dual-line communication completely effortless.
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ItsSeniItsSeni

DO NOT BUY

SUPPORT TEAM DOES NOT EXIST.

THEY ARE UNRESPONSIVE. ATTEMPTING TO CHANGE A NUMBER AND IT GIVES ME AN ERROR MESSAGE AND TELLS ME TO CONTACT SUPPORT EVERYTIME!!

PAYING A SUBSCRIPTION FOR A USELESS APP I CANT EVEN USE.
Steven291Steven291

Convenient

This application makes it easy to separate work and personal calls without carrying a second phone or paying for an additional SIM. The app's strong privacy features and low-cost calling to the US and Canada offer a convenient, budget-friendly way to manage multiple numbers on one Device.
FinnAllynFinnAllyn

It is very Useful

This is the perfect solution for anyone needing a reliable second phone line without the hassle of carrying an extra device or paying for another SIM card. Its privacy-focused features and incredible savings on outbound US and Canada calls make managing business and personal communications on a single iPhone seamless and affordable.
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ImFabin08ImFabin08

Very helpful

Sideline is the perfect pocket sized solution for anyone needing a verified USA phone number without an extra SIM card. It protects your personal privacy and cuts outbound calling costs to the USA and Canada by up to 72 percent. You can seamlessly manage business calls, texts, and faxes on your primary device over WiFi or cellular data.
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DerekMRussDerekMRuss
See 161 more reviews

User experience

🐞

Reported Bugs

3 issues

Login and account management problems

Bug

Inconsistent call quality in low signal areas

Bug

Billing and subscription issues

Bug
✨

Requested Features

4 requests

Improved call blocking and spam filtering

Feature

Integration with popular messaging apps

Feature

Expanded number selection options

Feature

Enhanced voicemail and call forwarding features

Feature

FAQ

What does this app do?

This app provides you with a private, secondary phone number directly on your existing device. It allows you to make and receive unlimited local and international calls, send SMS messages, and even send faxes worldwide without needing an extra SIM card or physical device.

What are the key features of this second phone number app?

Key features include obtaining verified USA phone numbers, unlimited calling and texting, the ability to send faxes globally, blocking unwanted numbers, and a 'Name Number' feature for easy identification of your contacts. It also supports light and dark modes.

How much does this second phone number service cost?

The service operates on a subscription model. Options include monthly subscriptions for one phone number at $9.99, weekly subscriptions for one phone number at $5.99, and annual subscriptions for up to three phone numbers at $74.99, offering significant savings.

Is this app compatible with my device?

The description does not explicitly state device compatibility. However, it is designed to work on your 'same personal device' and offers features like light and dark mode, suggesting it is a standard mobile application.

What are the common use cases for a second phone number?

Common use cases include protecting your primary number's privacy, reducing spam and harassment, enhancing work-life balance by separating personal and business communications, and managing different aspects of your life with distinct phone lines without purchasing additional hardware.