Antox is described as 'Android client for Tox. It aims to bring the full multimedia support Tox offers to your device, although it's still currently in heavy development' and is an app in the Social & Communications category. There are more than 25 alternatives to Antox for a variety of platforms, including Android, Linux, iPhone, Mac and Windows. The best alternative is Signal, which is both free and Open Source. Other great apps like Antox are Tox (Free, Open Source), FluffyChat (Free, Open Source), qTox (Free, Open Source) and Status (Free, Open Source).
Signal is a messaging app with an unexpected focus on privacy, combined with all the features expected from a modern IM app. Signal has received a lot of praise from all around the world for its security and privacy-respecting technologies.
FluffyChat is an open, nonprofit and cute matrix messenger app for Ubuntu Touch, Android and iOS. Open Opensource and open development where everyone can join. Nonprofit FluffyChat is donation funded. Cute ? Cute design and many theme settings including a dark mode.
Olvid, the most secure messaging app in the world. Olvid guarantees the total and definitive confidentiality of exchanges, relying solely on the mutual trust of interlocutors. For the first time, security does not rely on trusted servers.