Saifullah AhadHow I built it
Seven apps, from problem to proof
The plan I wrote, what the testing caught, and how each app reached Google Play. Every fact comes from the app's own build record.
People who stutter practice alone for months. It shows, as they speak, whether the techniques are working — and never shows a number it didn't measure.
The first check said "ready" — the sound engine had never run. Making it run found three bugs, then a controlled tone test proved the fix.
The phone being sold tests itself and hands the buyer a signed result — proven on a real phone, with zero crashes.
Friends and family cancel debts that go in a circle — only when everyone in the loop agrees. Proven with a real two-person test.
Tells you exactly where and when to look for the new crescent, from real astronomy — and says when a sighting was impossible.
Orders a village's one harvester by which field is losing grain fastest — and every phone can check the order is fair.
Shows where a link really goes before you open it. Testing caught two real bugs, fixed with tests that failed first.
Open to work
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Based in Dhaka, Bangladesh (UTC+6) · works any time zone · can start now · ready to relocate with visa sponsorship.