The Business Mobile App Built for Work

With the OnSIP business mobile app for iOS and Android, your work phone goes with you. Make calls, send SMS/MMS, and handle voicemail from your smartphone—just like you would in the office.

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One Mobile VoIP App for Every Feature Your Business Needs

Built for Business. Designed for Mobile

Stay connected to your business phone system with the OnSIP mobile app. Call, text, and listen to voicemails on any iOS or Android device.

Start Mobile Calling
Empower your workforce
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All-in-One Mobile VoIP App for Calling, SMS, and Video

Use one app to manage calls, SMS messaging, and video communication. Stay productive with a single mobile VoIP solution designed for business on the go.

Manage Calls Anywhere
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Call Handling and Contact Management

Manage transfers, multiple calls, and in-call controls with ease. Whether you're accessing recent calls or looking up a colleague, everything you need is right at your fingertips.

Explore Mobile Features
Calls, voicemails, and contacts in one app
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Send Business SMS from Your VoIP Number

Send and receive business SMS and MMS straight from your mobile device. Keep conversations organized, accessible, and easy to review.

Start Business Texting
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Extend Your Cloud VoIP System to Mobile

 Access your cloud phone system instantly by logging in with your SIP credentials. No hardware or setup is required to turn your smartphone into a business phone 

Connect Your Phone System
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Secure Mobile VoIP App for Remote Teams

Give your workforce a secure, reliable way to communicate across locations. This mobile VoIP solution keeps remote and hybrid teams connected and productive.

Enable Remote Teams
Globe - Communicate from anywhere
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See, Tap, and Play Your Voicemail

Play, delete, and manage voicemail messages directly from the business mobile app interface. No dial-in, no PINs—just tap and listen whenever it's convenient for you.

Get the Mobile App
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Want more details?

We're sorry--it looks like you are located in a country that OnSIP doesn't service. If you are located in the U.S. and you received this message, please contact us at (800) 801-3381.