Email linsizhen@gmail.com — questions, bug reports, and feature requests all welcome. You'll hear back within a couple of days.
Labels assume a generic pool. The app sizes doses to the volume you entered and the reading you logged. When they disagree, follow the more conservative number, add, circulate 30 minutes, and retest. The label always wins over any app.
Export your test history as CSV from the other app, then open your pool in this app and choose Import Tests (CSV) from the menu. Files with a Date column and standard column names (FC, pH, TA, CH, CYA, Salt) import directly; duplicates are skipped automatically, so importing twice is safe.
Check Settings → Notifications and make sure notifications are allowed for the app. Reminders are counted from your last logged test, at 9 AM local time.
The app collects nothing. See the privacy policy.