Wet Months

Wet Months tells you whether a rainwater tank will carry you through the dry months. Enter your roof, your tank, what you use and twelve months of average rainfall, and it works through a typical year one day at a time. It runs entirely on your phone. THE TANK YEAR The home screen is a year of your tank: how full it is each day, the days it cannot cover, and the days it spills over the top. Above it, the share of days the tank covers and how much mains water you would need. RAIN IN SHOWERS, NOT AVERAGES Each month's rainfall is spread over its rain days, with a few heavy showers and more light ones. Two storms fill a tank. Twelve drizzles with the same total mostly go down the first-flush diverter. Most rules of thumb treat those as the same month. FIRST FLUSH, PER SHOWER A diverter wastes the start of every shower. Wet Months takes that off each rain event, so a dry month of light showers can deliver almost nothing. WHICH TANK SIZE IS ENOUGH See the share of days covered for sixteen tank sizes on your roof. The knee on the curve shows where a bigger tank stops buying much more water. If your roof catches less in a year than you use, the app says so: no tank fixes that. DAYS OF WATER LEFT Log what the gauge reads. With two readings the app measures what you actually draw, adds back the rain each coming day usually brings, and tells you roughly when the tank runs dry. IT WILL NOT GUESS Until all twelve months of rainfall are in, the app names the missing months instead of showing a number. SITES The house, the shed, the barn. Search, star, archive what-if setups, select several at once, and restore anything from the trash. ALSO Extra garden use in the months you water. A slider to try another tank size. A weekly reading streak and a few milestones. Metric or US units. A mains water price in your currency, to put the saving in money. BACKUPS AND CSV Save a JSON backup and restore it on a new phone. Export sites, rainfall and readings as CSV. PRIVACY No account, no sign-in, no cloud sync, no analytics, no ads, no third-party SDK. Records are kept in encrypted storage on the phone. Wet Months asks for one Android permission, INTERNET, and uses it only to open the privacy policy from Settings. Our Data safety declaration says no data collected. Results are planning estimates from average rainfall. Real years vary. Free, with no ads and no purchases.

First release of Wet Months. - A typical year of your tank, day by day - Rain spread over rain days, with first-flush loss per shower - Tank-size curve with the knee, and a warning when the roof is the limit - Dip readings with a days-of-water-left forecast - Sites, search, trash with undo, JSON and CSV export, all offline