Writing
Everything we have published, newest first. Teardowns are what we found wrong with apps that already exist. Rebuild notes are what we changed and what we got wrong doing it.
- Guide
pyzk on a real ZKTeco K40, and what the library does not tell you
pyzk driven against a ZKTeco K40 (firmware Ver 6.60, platform ZLM60_TFT) since 15 September, enrolments watched with a person at the terminal, a 258 student push timed six times, and three faults found on the device in the MIT alternative. - Guide
ZKTeco terminal not connecting to the PC, and the five checks that find why
A ZKTeco K40 on a direct cable to a Windows 11 laptop since 15 September, a connection check that walks five steps in order, a 30.2 second check cut to 2.2 seconds, and the first laptop outside the studio, which stopped at step two, was then set up from the program with one Windows prompt, and still reached the terminal after a restart. - Rebuild note
Twenty-three names cleared for trademark, none for a domain
Twenty-three names through four rounds of clearance, two finalists whose domains were registered in 2011 and 2023, and 140 replacement domains tested by RDAP. - Rebuild note
Four tests that could not fail
Four guards in Quilore that passed while unable to fail, a suite of 409 that stayed green against a file that would not parse, and 68 that passed on a share card printing two lines in the same place. - Teardown
Five Spotify stats apps, 1,439 reviews, two complaints
1,439 Google Play reviews across five apps, read on 6 September 2026, and the fifty-item Spotify endpoint that makes the biggest complaint structural rather than incidental. - Rebuild note
Spotify's timestamp is the end of a play, not the start
137,153 back-to-back plays from a real 160,634-record Spotify export, and the 83.5 per cent against 0.3 per cent that settled which end of the song the timestamp marks. - Teardown
Five Pomodoro apps, two thousand reviews, one complaint
Two thousand Google Play reviews across five apps, read on 24 August 2026, and the negative-countdown bug we shipped in an early StudyPomo build and had to fix. - Rebuild note
Android notification channels do not change their mind
Two sound failures in StudyPomo, five selectable chimes, and the channel id that encodes the choice. - Rebuild note
The part of Ponderanda that will never carry an advertisement
Ponderanda, live on Google Play since 17 August 2026. The daily ladder carries no advertising, the back catalogue is uncapped, and both are checkable by installing it. - Rebuild note
A foreground service, a wake lock, and a TECNO that ignores both
Sixteen builds of StudyPomo 1.0.0, and a foreground service measured dying on a TECNO KM7. - Rebuild note
The release build is not the app you tested
Two release-only failures in StudyPomo, and the keep rules that are still in the shipped 1.0.0 mapping.