Cleanlet vs FloodNotice
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cleanlet
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Cleanlet is a unique, gamified platform designed to encourage community participation in maintaining clean storm drains and preventing flooding. This initiative, brought to you with NSF funding for Drexel University's College of Civil, Environmental, and Architectural Engineering, empowers every individual to contribute to environmental research on climate change. Create an account, locate nearby storm drains using our easy-to-navigate map, and sign up for notifications about upcoming cleaning jobs. Before an adverse weather event, you'll receive a push notification to clear debris from your chosen storm drain. Snap before and after photos of your hard work to earn points and level up. While the points may be for bragging rights, the real reward is a safer, cleaner neighborhood and a healthier environment. Join Cleanlet, contribute to crucial climate change research, and take a hands-on role in protecting your community from storm drain flooding. Cleanlet: changing the world, one storm drain at a time.
FloodNotice
Access real-time streamflow, river levels, and flood forecasts from over 6,000 locations across the U.S. Save your favorite streamgages for quick access to critical waterbody information.
- Real-time streamflow observations
- River level monitoring
- Flood condition alerts
- Streamflow forecasts
- Save favorite streamgages
- Coverage across 50 U.S. states and Puerto Rico
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FloodNotice, the streamlined way to view real-time streamflow observations, river levels, and flood conditions, along with streamflow forecasts published by the National Weather Service's National Water Prediction Service (NWPS). Mark your favorite streamgages for easy access when heading out to your favorite waterbody. Highlights: - View stream/river conditions and forecasts from over 6,000 streamgages - Covers all 50 U.S. states and Puerto Rico - Save favorite streamgages for quick reference
Screenshots
Verdict
The clearest difference is update cadence: Cleanlet at every 6 weeks against FloodNotice's every 7 months. Cleanlet also leads on iOS requirement (14.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Cleanlet ships an update every 6 weeks, FloodNotice every 7 months. The most recent releases landed on September 11, 2026 and July 23, 2026 respectively.
| Parameter | Cleanlet | FloodNotice |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (9 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 9 — better |
| Update frequency | Every 6 weeks — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 72 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Drexel University | Nathaniel Copeland |
In-app purchases
Cleanlet
No in-app purchases
FloodNotice
No in-app purchases









