You are worse at predicting time
than you think.
Everyone is. Plannacy turns a few everyday guesses into small, locked predictions against reality — and shows you the gap.
Make your first CallFree · no account needed · works in your browser
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In the study that named the planning fallacy, students predicted 34 days to finish their thesis and took 56. Only about 30% finished by the date they had chosen themselves.
Buehler, Griffin & Ross (1994), Journal of Personality and Social PsychologyHow it works
- 1
Call it
“Home by 17:00.” “This will take 30 minutes.” Three seconds, once or twice a day. Not a to-do list.
- 2
Lock it
Press and hold. Once sealed the prediction cannot be edited — which is the whole point. You cannot learn from a guess you were allowed to revise.
- 3
Meet reality
Close it when it actually happens. See predicted against actual, and watch your score become more trustworthy as the evidence builds.
One number, honestly earned
Your Plannacy Score starts from a prior rather than from zero, so a single lucky prediction cannot make you look calibrated. It moves slowly, on evidence, and it can go down.
100 is not the goal — it is not even reachable. Real life reschedules, and a score that demanded perfection would be lying to you about what calibration is.
What it refuses to do
No leaderboard
Ranking people by accuracy rewards easy predictions and cancelled ones. There is nobody to beat here.
No streaks to protect
Missing a day is not a failure. This is a skill you are building, not a habit you are being nagged into.
No shame in a miss
A bad prediction is the interesting one. It is where the learning is, and the app says so.
No numbers we cannot support
No score until there is evidence for one. No pattern claimed from three data points. The app says it is still learning instead.
Your predictions are yours
Plannacy does not pool your data to tell other people how they compare. When the app shows you a benchmark, it is a published study, cited — not a number quietly built from other users’ lives.
Today everything is stored in your own browser. There is no account and no server holding your calls.