Antidote ー Private Messenger is a free application available on the iPhone platform. It falls under the Social & Communication category, specifically social networking. The program offers a range of features tailored for private messaging, including one-to-one conversations, typing notifications, and push message support through Apple Push Notification.

Additionally, users can enhance their conversations with emoticons, spell check, and file transfer capabilities. Antidote ー Private Messenger also supports reading/scanning Tox ID via QR code, read receipts, and the convenience of multiple profiles. Users can import/export tox_save, set avatars, and engage in audio and video calls for a comprehensive messaging experience.