Rain Tally is a virtual rain gauge application designed for iPhone users. It allows you to track rainfall measurements for your personal rain gauge or access online precipitation forecasts and past rainfall data (subscription required). The app automatically updates forecasted rainfall amounts with actual measurements as weather stations report in.

With Rain Tally, you can monitor precipitation data for multiple locations, making it ideal for managing watering needs in various gardens. Set a weekly rainfall target to easily determine if irrigation is necessary for your lawn or garden. The app also provides insightful trend charts to help you understand drought conditions and compare current rainfall levels to historical data.