
Problem
Mincha (the afternoon prayer) has a window that shifts every day with sunset, and it is different in every city. Without checking a calendar daily, people miss the window without realizing it.
Approach
We built a location-aware web app that calculates the correct mincha window for wherever the user is and sends an automatic reminder before it closes, with no manual setup per day.
Outcome
The tool is live and handles the calculation and reminder automatically, so users do not have to look up times themselves. A focused scope like this — one calculation, one reminder, no accounts — is what kept it to about a month.

