Reckon

Meet Reckon

Reckon is a decision journal for iPhone and iPad that records a prediction, a confidence estimate, and a future review date before the outcome is known. Dated check-ins preserve changes in confidence, and resolved decisions feed a calibration view showing how stated probabilities compare with actual results.

The app keeps original predictions and outcomes on the record, separates satisfaction from correctness, and schedules a later second look at whether you would make the same decision again. Reliability diagrams, hit rates, and Brier scores become more informative as entries accumulate. Data stays on the device and syncs through personal iCloud; users grade their own outcomes.