OnSIP

OnSIP

Softphone & Voicemail Manager

67 ratings
26 reviews
Free

Details

  • Released
  • Updated
  • August 2, 2018
  • August 19, 2026

Features

OnSIP screenshot #1 for iPhone
OnSIP screenshot #2 for iPhone
OnSIP screenshot #3 for iPhone
OnSIP screenshot #4 for iPhone
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About

This app extends your business phone system to your mobile device, enabling HD voice and video calls, contact monitoring, and voicemail management. Stay connected with clients and colleagues from anywhere, without needing extra hardware.

✓HD voice and video calls
✓Voicemail management
✓Contact availability monitoring
✓Call history
✓Remote work connectivity
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What's New in OnSIP

2.2.1

August 19, 2026

Bug fixes and stability improvements

User reviews

Junk

Completely unreliable

not great

just does not work when people call so i don't use the phone service w

Good luck

Absolute rubbish. Cannot hear or talk to any calls that make it through. I used to be able to, for the past year at least I have not. Also, unable to stop the ring on my phone without also stopping the ring at my desk. So, if I am away I can avoid getting calls but if I am here I must hear both my cell phone ring and my desk phone ring which is very annoying.
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Near worthless app

I used Bria for years with Onsip and I am going back. The Onsip app crashes all the time and consistently drops calls before I can pickup and when I can answer it gives dead air almost 100% of the time on cellular and 60% of the time on Wifi

App is giving major issues since update

I hate to write a bad review, but feeling compelled after reading the review before me. We’ve been an OnSip customer for over 8 years and for the first time are seriously considering switching because of the disruption to how we do business. The new update to the app is the most problematic. The app has always had issues with iOS but even more so now.

-Can’t hear the incoming caller
-dropped calls while speaking and navigating to transfer
-too many screens to navigate and switch between.
-transfer button is missing 50% of the time. If it says “open OnSip” then there is no way to transfer.
-after transfer button, too many steps to find contact. Not able to enter the extension manually.
-definitely not working with 5g. Less issues when on WiFi but still problematic.

Customer support is doing their best to manage the influx of calls but I know they are frustrated as well.
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FAQ

What does OnSIP do?

OnSIP brings your business phone system to your iPhone, allowing you to make and receive HD voice and video calls, monitor contact availability, and manage your voicemail. It enables seamless business communication from any location.

What are the key features of OnSIP?

Key features include HD voice and video calling, real-time contact availability monitoring, access to recent call history, and a simple interface for managing your voicemail. It provides standard business phone functionalities without requiring additional hardware.

Is OnSIP free to use?

Based on the provided information, the app itself is free to download and use. There are no in-app purchases or advertisements mentioned.

Who is OnSIP for?

This app is designed for business professionals, remote workers, and anyone who needs to maintain their business phone presence and communication capabilities while on the move or away from the office.

How does OnSIP help with remote work?

OnSIP allows you to connect with customers, partners, vendors, and coworkers from your OnSIP account on your iPhone, regardless of your location. It ensures you have access to essential business phone features, making remote work more efficient.