Free: up to 5 habits, yes/no and numeric types, stats page for every habit, 60 days of stats, multi-device sync. Pro monthly: $3.99/month (7 days free). Pro yearly: $29.99/year (37% savings, 7 days free). Lifetime: single payment for all Pro features forever.
Not given
Key features
Four habit types: checkmarks, numbers, times of day, and select lists
Correlation charts overlay multiple metrics to show patterns
Apple Health auto-fill for steps, weight, and health metrics on iOS
AI integration via Claude or ChatGPT through MCP protocol
Offline-first sync across iOS and web
Skips pause streaks instead of breaking them
CSV and JSON data export on all tiers
Color-coded habit pages with stats, streaks, and heatmaps
Public REST API at /api/v1 with user-generated keys
No ads, no tracking, no gamification, and no social feed
Three-coin casting method for generating six-line charts
Rule-based chart calculation with stem-branch assignment
Optional AI-assisted interpretation of results
AI follow-up questions and conversation feature
Local browser storage for reading history
Hexagram judgments and images reference
Multi-language support including English, Chinese and Spanish
What makes it different
Tracks real times of day, not checkboxes, so 07:15 wake-ups are stored as actual times
Correlation charts show how habits move together on one overlay
Data owned by user: export anytime, delete immediately with no waiting period
Offline-first mobile app syncs when reconnected, never loses data
Built by one solo developer focused on calm, private design with no nagging
Transparent rule-based chart calculation that AI cannot alter
All charting happens locally in your browser for privacy