Seneca, as a wise friend.
Seneca's letters are the most readable Stoic book ever written: practical, warm, often funny, never preachy. The Seneca AI guide in Virtue Guide brings that voice into a conversation you can actually have, about the things you actually face.
Virtue Guide — the Stoic practice companion app within the StoicOs.ai ecosystem — is officially available in the Apple App Store and the Google Play Store. Free to download.