imo has built its user base largely in regions where data costs are high and bandwidth is limited, and its design reflects that. Video and voice calls compress aggressively and maintain reasonable quality at low bitrates, which is the single thing that explains its billion-plus installs better than any other factor. For international calls between users in South Asia, the Middle East, and Southeast Asia, it often outperforms larger alternatives on constrained connections.
The trade-off is privacy. imo has faced scrutiny for data collection practices and its ownership structure, and the app requests a wide range of permissions. The interface is functional but dated, and the non-communication features — stories, nearby users, the explore feed — add social-network elements that feel mismatched with what most users actually want from the app.
If you need a reliable low-bandwidth video calling option for international communication and aren’t handling sensitive conversations, it does its primary job well. If privacy is a concern, there are better-audited alternatives.
Verdict: A pragmatic choice for low-bandwidth international calling, but carry real awareness of the privacy trade-offs.
