RiverApp vs Blue Liner Flows
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/
Blue Liner Flows
Access detailed USGS and NOAA river flow data, including discharge, temperature, and gauge height. Explore rivers with an interactive map, set custom tags for organization, and receive alerts for condition changes. Plan your outdoor activities with integrated weather forecasts.
- River flow data (discharge, temperature, pH)
- Interactive map with directions
- Customizable stream tagging
- Real-time condition alerts
- Home screen widgets
- Integrated weather forecasts
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With Blue Liner Flows, you are only one click away from easy access to detailed and comprehensible river flow information. With data aggregated from both the USGS and NOAA, parameters such as discharge, temperature, turbidity, dissolved oxygen, pH, and gauge height are available for thousands of rivers and streams across the U.S. This simple and easy-to-use app offers endless searching and viewing options, allowing you to effortlessly check in with your favorite streams. And, with an interactive map embedded within the interface, exploring and gaining directions to new rivers has never been made easier. Blue Liner Flows also gives you the ability to categorize any watershed into your own set of personalized tags, making organization a breeze. These features and many more can be available to you and have never been more accessible. - Set up alerts to be directly notified when river conditions change. - Use widgets to gain practical flow information at a glance directly from your Home Screen, Lock Screen, or Today View. - Organize streams under your own array of fully customizable tags. - Along with NOAA river forecasts, use detailed weather information such as barometric pressure, cloud cover, and more to plan your day on the water. - Useful for any activity on the river, whether it be fishing, rafting, kayaking, boating, or even swimming! All river gauge information is provided by the USGS and NOAA. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ratings volume: RiverApp at 5.5K against Blue Liner Flows's 42. RiverApp also leads on review sentiment (79% vs 64%). Blue Liner Flows's advantage is update cadence (weekly vs every 3 weeks). On price, rating, ads 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 Blue Liner Flows sells 2 in-app purchases, starting at $6.99 per year. 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 4.7 for Blue Liner Flows. That said, the two scores are not equally well evidenced: RiverApp has 5.5K ratings behind it against 42, 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 64% of Blue Liner Flows's.
RiverApp ships an update every 3 weeks, Blue Liner Flows weekly. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.
| Parameter | RiverApp | Blue Liner Flows |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5.5K ratings) — better | 4.7 (42 ratings) |
| Positive reviews | 79.3% of reviews — better | 64.3% of reviews |
| Number of ratings | 5.5K — better | 42 |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #117 — better | #191 |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 17.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 56 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Florian Bessiere | Ryan Olson |
Customer experience
RiverApp
Blue Liner Flows
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)
Blue Liner Flows
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
Blue Liner Flows
- Premium Annual Subscription7 Days trial$6.991 Year
- Premium Lifetime Edition$19.99
Questions
Is RiverApp free?
Is Blue Liner Flows free?
Which has better reviews, RiverApp or Blue Liner Flows?
Do RiverApp or Blue Liner Flows have ads?
Which is updated more often, RiverApp or Blue Liner Flows?
Which is more popular, RiverApp or Blue Liner Flows?
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