Monitor rivers and streams on the go.

Full iOS support

User interfaces take full advantage of iPhone / iPod, and iPad devices.

Apple Watch

With our watchOS app, take a quick glimpse at gauge height, 24-hour precipitation total, and current discharge values of your favorite gauges right on your wrist. Also take a quick peek at height status and flood stage summary data from the Glance.

Real-time data

Leverages US Geological Survey's real-time data to offer the most recent and accurate stream gauge data available.

Flood stage visibility

Is your gauge nearing or at a flood stage level? FloodWatch leverages National Weather Service data so you can identify gauges approaching or at flood stage levels.

Long-term data

Looking for trends over time? View gauge height, precipitation, and discharge values over the past seven to 120 days.


Free and ad-supported on iOS platforms! In-app purchases available to remove ads and support continued development via a "tip jar" model.