Any kit, no camera required
Photo reading depends on light, focus and the angle of the strip. Pool Calc skips that step. Choose your kit during setup (strips, a drop kit or a digital meter) and the entry screen matches it: strip readings snap to the steps a strip can show, drop tests take finer values. One screen, no keyboard for readings.
Amounts, in order
Pool Calc turns the readings into a plan: what to add first, how much of each product on your shelf, and how long to wait before the next step. Large doses are split. "Mark as added" logs each one and sets a retest reminder.
A history you can chart
Every test, dose and maintenance task goes into the log, with charts from 7 days to all time and each chemical addition marked. For one pool, that's free and backed up to your iCloud.