Habo

Habo is an open-source habit tracker for iOS and Android built around one idea: your habit data belongs to you and no one else. Habo Sync uses zero-knowledge end-to-end encryption - your data is encrypted locally with your Master Password before it ever leaves your device. The server stores and syncs ciphertext only. Not habits, not notes, not streaks. Not even if someone asked. Prefer to run your own backend? Self-hosting is fully supported via Supabase and is free forever. What you get: Cross-device sync with E2EE zero-knowledge encryption Automatic encrypted cloud backups Yes/no, numeric, and skip completion types Streaks, statistics, and calendar view Reminders, biometric lock, dark/OLED themes Full data export Self-hostable - GPL-3.0 open source