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Free messaging and video call app, built to work on weak connections.
imo is a free messaging and video calling app from Pagebites, Inc. in Palo Alto. It is still live, and its Android app was last updated in October 2026.
imo started in 2005 as a web app that connected several chat networks at once. It dropped support for third-party networks such as Facebook Messenger, Google Talk, Yahoo Messenger and Skype in March 2014, and is now its own network, with accounts tied to a phone number. Today it focuses on voice and video calls that work on 2G, 3G, 4G and Wi-Fi, group video calls, chats with files, and voice rooms. The Android app has over 1 billion downloads and shows ads.
Bottom line: imo is a fair pick for calling family or friends where the connection is poor. If you want a messenger with no ads, look at the alternatives.
Voice and video calls that the app says work over 2G, 3G, 4G and Wi-Fi, aimed at places with limited connectivity.
Call several people at once by video, as well as one to one.
Send text, photos, videos, voice messages and files in one to one and group chats.
Join group audio chats in voice rooms. The listing also says personal chats and calls are end-to-end encrypted.
| Plan | Price | What you get |
|---|---|---|
| imo app | Free | Messaging, voice and video calls, group video calls and voice rooms. The app shows ads. |
| Paid plans | None listed | We found no paid plan to list. |
Based on the Google Play listing, which marks imo as free with ads. Mobile data charges from your carrier may apply.