RainCatchRainCatch
Know exactly how many litres the next rain will put in your tank.
Download on the App Store
Screenshots
Features
Rainfall turned into litres
Enter your roof catchment area, collection efficiency and tank capacity, and RainCatch turns the forecast into the water you can realistically expect to collect.
Day-by-day fill forecast
Watch the level climb across the coming days, see which day the tank tops out, and how much simply runs to waste as overflow.
Overflow warnings in advance
If a big downpour is going to fill you past capacity, you'll know beforehand — time enough to draw water down and keep every litre you can.
Track what the garden drinks
Log each watering so your level stays honest. The forecast then reflects what you actually use, not just what falls from the sky.
Compare tanks and roofs
Set up several tanks and catchment surfaces — house, shed, carport, verandah — and see which one really earns its keep after the same downpour.
Widget and no-location mode
Put the next expected collection on your Home Screen. Rather not share your location? Enter the rainfall yourself and everything still works.
Know what the next rain will add to your tank.
RainCatch turns a daily precipitation forecast into a practical estimate for your rainwater tank or water tank. Enter roof catchment area, collection efficiency, tank capacity, and current level to see estimated litres or litres, the level after rain, and overflow.
• Plan collection across a 7-day forecast
• Track each tank and roof catchment
• Record water used in the garden
• Calculate from manual rainfall without location
• Use metric or US customary units
• See the next collection in a Home Screen widget
• No account, advertising, or analytics
Designed for planning non-potable outdoor water use. Actual collection varies with roof shape, gutters, debris, wind, and local conditions.