Catchgrid
Record the positions.
Compare the next test.
Measure equal-container sprinkler depths in a 4–64-position grid. Inspect the exact lowest quarter, then compare another test at the same positions with each duration accounted for.
One-time App Store app purchase. Prepared for App Store review; approval and availability are not confirmed.


The measurement stays inspectable
- Record missing values separately from measured zero; use millimetres or inches.
- Import a strict CSV, keep its original bytes, and edit current readings independently.
- See the selected lowest-quarter positions and the arithmetic behind DU and measured rate.
- Retest a saved grid and compare per-position rates, normalized by each test's duration.
- Export current and baseline CSV, original sources, a report, integrity manifest and restorable JSON backup.

Screens show synthetic demonstration readings, not measured customer results. Catchgrid is an informal worksheet: it does not certify an irrigation audit, control hardware, prescribe a controller schedule or establish water savings.