RainLab
See where the rain goes.
Change one catchment assumption, then follow water into infiltration, surface runoff, storage, outlet flow, and overflow in a tactile offline experiment lab for iPhone and iPad.
A transparent educational model—not a live flood forecast or drainage design tool.
Offline learning tool
Change one thing. Watch water move.
RainLab keeps the first experiment small enough to understand: labeled assumptions, deterministic outputs, and a visible boundary around what the model can say.
Start with a storm
Compare a gentle shower, a peaking event, or dry weather as a limiting case.
Try the surface
Switch between a dense street, mixed lot, and porous park to see infiltration and runoff partition differently.
Inspect the balance
Follow basin storage, outlet limits, overflow flags, and mass-balance residuals. Export the experiment as CSV or JSON.
Clear limits
Useful for intuition, bounded by design.
RainLab is an independent reduced-order model. It does not use live weather, maps, location, a full SWMM runtime, calibrated site data, or professional drainage and flood prediction claims.
Privacy
Runs on your device.
No account, network service, advertising, analytics, tracking, microphone, camera, or collected personal data is needed for the lab.