There are apps similar to Onion browser that prioritize online anonymity and privacy. Here are some examples:- Orfox - a mobile web browser for Android devices that is based on the same source code as Tor. It provides similar anonymity and privacy features as the desktop version. Brave - a privacy-focused web browser that offers built-in ad-blocking and anti-tracking measures to safeguard online privacy. It has a Tor-powered private browsing mode and uses encryption to secure browsing activity. Firefox Focus - a mobile web browser that prioritizes privacy and security. It blocks ads and tracking cookies and deletes browsing history automatically. I2P - an anonymous network that uses encryption and routing to protect the online activity, similar to Tor. It has a built-in web browser and access to websites hosted on the I2P network.