RiverApp vs Flood Alert Watcher
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RiverApp
Access real-time water levels, flows, and temperatures for rivers worldwide. Ideal for sports enthusiasts and professionals, it offers detailed maps, navigability information, and customizable alerts for over 40,000 hydrometric stations.
- Real-time water levels and flows
- Water temperatures
- Hydrometric station maps
- Customizable alerts
- Whitewater course navigability
- User-added hazards and courses
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Get quick access to the latest river levels, flows and conditions across the US and more than 20 other countries worldwide. RiverApp gives you access to one of the world’s most comprehensive hydrometric datasets, with data from over 40,000 monitoring stations. Whether you kayak, canoe, packraft, paddleboard, fly fish, surf rivers, manage irrigation, operate hydropower infrastructure or monitor flood risk, RiverApp helps you stay informed with reliable, easy-to-read river data. FREE FEATURES ‣ Current water levels and flows for over 20,000 rivers ‣ Water temperature data where available ‣ Detailed maps of hydrometric stations and whitewater sections ‣ Custom alerts for each station when a defined level or flow is reached ‣ Favourite stations and whitewater sections for quick access to the latest readings and conditions FREE FEATURES FOR WHITEWATER SPORTS ‣ More than 4,000 referenced whitewater sections ‣ Section conditions based on current water level or flow ‣ Detailed section maps with quick access to put-in and take-out points ‣ Hazards, rapids and other points of interest, including photos where available ‣ Information on difficulty, length and average gradient ‣ Community-based addition and editing of whitewater sections RIVERAPP PREMIUM Unlock additional tools for deeper river monitoring and trip planning: ‣ Historical water level and flow data going back several years ‣ Forecasts for selected stations ‣ Satellite map layers from multiple providers, with comparison tools ‣ Customizable Home Screen Widgets to keep your favourite river gauges visible at a glance ‣ Monthly streamflow statistics to understand seasonal variations and plan river trips at the right time and place DATA SOURCES RiverApp brings together data from over 100 official and public hydrometric sources worldwide, including, among others: NVE California Data Exchange Center Government of Canada — Wateroffice USGS NOAA PEGELONLINE — www.pegelonline.wsv.de HVZ Baden-Württemberg HDN Bayern Kanton Bern Ennskraftwerke Land Kärnten Land Niederösterreich Regione Piemonte HVZ Rheinland-Pfalz Český hydrometeorologický ústav HVZ Sachsen-Anhalt Land Salzburg Scottish Environment Protection Agency Slovak Hydrometeorological Institute Agencija Republike Slovenije za okolje HWZ Steiermark BAFU HNZ Thüringen Land Tirol Shoothill Vigicrues Serveur de données hydrométriques temps réel du bassin Rhône-Méditerranée Land Vorarlberg Bureau of Meteorology — Australia DISCLAIMER RiverApp is an independent application and is not affiliated with the listed organizations unless explicitly stated. RiverApp and the listed data providers shall not be held liable for any errors, omissions, delays or interruptions in the information provided, nor for any loss, injury or damage of any kind resulting from its use. End-user license agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Flood Alert Watcher
Receive real-time flood alerts and weather warnings for the UK. View interactive flood maps, understand warning levels, and get peace of mind with trusted data from the Environment Agency.
- Real-time flood alerts
- Interactive flood maps
- Environment Agency data
- Three warning levels
- Instant notification alerts (premium)
- Ad-free experience (premium)
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Flood Alert Watcher – Stay Ahead of the Floods Stay one step ahead of flooding with Flood Alert Watcher for the UK, your trusted companion for real-time flood alerts and weather warnings. Whether you're at home, at work, or on the go, our app keeps you informed and prepared for any potential flood risks in your area. Key Features - Interactive Flood Maps View live, dynamic maps that show affected areas and potential flood zones near your location. - User-Friendly Design Navigate effortlessly with a clean, intuitive interface that helps you find key information quickly. - Accurate, Trusted Data All flood and river level data come directly from the Environment Agency, ensuring you receive the most reliable and up-to-date information. - Peace of Mind With Flood Alert Watcher, you can feel confident knowing you’re always informed and ready for any flood emergency. Warning Levels Flood Alert Watcher uses three clear warning levels: - Alert - Warning - Severe The app shows how many active alerts exist for each level. Tap on any alert to see its location highlighted on the map, or tap directly on a map alert for full details. Upgrade for More Subscribe to unlock powerful premium features: - Notification Alerts – Receive instant alerts for new flood warnings in your area, so you can act fast. - Home Screen Flood Map – View flood risks for your current location at a glance. - Ad-Free Experience – Enjoy the app without interruptions. Stay informed, stay safe — and get peace of mind with Flood Alert Watcher Premium. Data Sources This app uses Environment Agency flood and river level data from the Real-Time Data API (Beta). Contains public sector information licensed under the Open Government Licence v3.0. Important Information Flood Alert Disclaimer: Flood data is provided via the Environment Agency’s Flood Monitoring API (environment.data.gov.uk/flood-monitoring). We aim to deliver accurate and timely alerts, but data may change or be delayed. Always verify with official sources before making safety decisions. For the latest official updates and advice, visit: https://check-for-flooding.service.gov.uk Use of this app is at your own risk. Neither this app nor the Environment Agency accepts responsibility for any loss, damage, or injury resulting from reliance on the information provided. EULA: https://mushroomapps.co.uk/licensed-application-end-user-license-agreement Privacy Policy: https://mushroomapps.co.uk/privacy-policy
Screenshots
Verdict
RiverApp and Flood Alert Watcher both sit at 4.8 stars, but that hides the real split: 79% of RiverApp's written reviews are positive against 13% of Flood Alert Watcher's. RiverApp also leads on ads (none vs shown) and ratings volume (5.6K vs 5). On price, rating, update cadence and in-app purchases 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. RiverApp sells 3 in-app purchases, starting at $0.99 per month and Flood Alert Watcher sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.8 for RiverApp against 4.8 for Flood Alert Watcher. That said, the two scores are not equally well evidenced: RiverApp has 5.6K ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 79% of RiverApp's written reviews are positive against 13% of Flood Alert Watcher's.
RiverApp ships an update every 2 weeks, Flood Alert Watcher every 3 weeks. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.
| Parameter | RiverApp | Flood Alert Watcher |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5.6K ratings) | 4.8 (5 ratings) — better |
| Positive reviews | 79.4% of reviews — better | 13.3% of reviews |
| Number of ratings | 5.6K — better | 5 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #112 — better | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 56 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Florian Bessiere | John Benson |
Customer experience
RiverApp
Flood Alert Watcher
Bugs and requests
RiverApp
Reported bugs
3 issues- Map feature not working due to internet connection issues
- Horizontal lines and color indicators disappearing from graphs
- Inconsistent or unreliable data updates
Requested features
5 requests- Add more river coverage, especially in underserved regions
- Improve forecast and prediction capabilities
- Implement a journaling or note-taking feature
- Allow for customizable alerts and notifications
- Add support for additional measurement units (e.g., millimeters)
Flood Alert Watcher
Not enough reviews yet to summarise bugs or requests.
In-app purchases
RiverApp
- Premium - 1 month subscription$0.991 Month
- Premium - 1 year subscription$6.991 Year
- RiverApp Premium$29.99
Flood Alert Watcher
- Monthly3 Days trial$0.991 Month
- Annual$1.991 Year
- Annual3 Days trial$2.991 Year
Questions
Is RiverApp free?
Is Flood Alert Watcher free?
Which has better reviews, RiverApp or Flood Alert Watcher?
Do RiverApp or Flood Alert Watcher have ads?
Which is updated more often, RiverApp or Flood Alert Watcher?
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