
Free
About
When did you last wash the car, play tennis, go to the gym, water the plants, call family, or have coffee?
WhenDid gives everyday moments a simple timeline. Create a tracker for anything worth remembering, log it in seconds, and add a date, time, intensity, or note whenever context matters.
SEE YOUR HISTORY CLEARLY
• Review every occurrence in one place
• Correct the date, time, intensity, or note at any time
• Explore timelines, monthly frequency, and typical gaps
• Archive old trackers without losing their history
SPOT RECURRING PATTERNS
After enough history is available, WhenDid estimates when a recurring event may happen next. Forecasts use only your own on-device history and include a reliability signal and estimated time window. They are pattern estimates, never certainties.
PRIVATE BY DEFAULT
• No account
• No ads or analytics
• No cloud service or internet dependency
• Your tracker content stays on your device unless you export or share it
OWN YOUR DATA
Export a readable JSON backup whenever you like. Restore it later with validated import, edit or delete individual entries, or erase all WhenDid data from Settings.
WhenDid is a memory and lifestyle tool. Its forecasts are not medical advice and should not be used for diagnosis, treatment, emergencies, or safety-critical decisions.
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What's New in WhenDid
1.0
August 22, 2026





