Comparison

River Levels & Flows vs Blue Liner Flows

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

River Levels & Flows

Access real-time USGS and AHPS river level and flow data, including flood status notifications. View weather prediction center charts for outlooks on precipitation and river flooding.

Highlights
  • USGS/AHPS river levels and flows
  • Flood status push notifications
  • Weather Prediction Center charts
  • Interactive gauge map
  • Gauge history and statistics
Features
Currently charting
Read full description

Main Features Include: + USGS / AHPS River Levels & Flows + Gauge Flood Status Push Notifications + Weather Prediction Center Charts Interactive USGS / AHPS Gauge Map The USGS maintains a national network of stream gauges that provide hydrological observations. In addition, AHPS collects real-time water level information from other federal, state, and local stream gauge networks. USGS / AHPS Hydrological Data Includes: + Water Level & Flow Observations + Gauge Levels, Flows & Volume Forecast + Gauge History & Statistics + Flood Status Push Notifications Weather Prediction Center Charts + Significant River Flood Outlook + Quantitative Precipitation Forecasts + Excessive Rainfall Outlook + U.S Hazards Outlook + Risk of Heavy Precipitation Enjoy!

About

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.

Highlights
  • River flow data (discharge, temperature, pH)
  • Interactive map with directions
  • Customizable stream tagging
  • Real-time condition alerts
  • Home screen widgets
  • Integrated weather forecasts
Read full description

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

River Levels & Flows4 screens
Blue Liner Flows4 screens

Verdict

The call

The clearest difference is price: Blue Liner Flows at Free against River Levels & Flows's $2.99. Blue Liner Flows also leads on update cadence (weekly vs every 3 months). River Levels & Flows's advantage is in-app purchases (none vs 2) and ratings volume (2.7K vs 42). On rating, review sentiment, ads 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

CostPrice · In-app purchases · Ads · Monetization

Blue Liner Flows is free to download; River Levels & Flows costs $2.99 up front. Blue Liner Flows sells 2 in-app purchases, starting at $6.99 per year. River Levels & Flows asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for River Levels & Flows against 4.7 for Blue Liner Flows. That said, the two scores are not equally well evidenced: River Levels & Flows has 2.7K ratings behind it against 42, so its average is the more settled of the two. Written reviews are what separate them: 59% of River Levels & Flows's written reviews are positive against 64% of Blue Liner Flows's.

UpkeepUpdate frequency

River Levels & Flows ships an update every 3 months, Blue Liner Flows weekly. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

Scorecard7 real differences · 4 level
River Levels & Flows versus Blue Liner Flows: the parameters behind the verdict, then further details
ParameterRiver Levels & FlowsBlue Liner Flows
Price$2.99Free — better
Rating4.6 (2.7K ratings)4.7 (42 ratings) — better
Positive reviews59.2% of reviews64.3% of reviews — better
Number of ratings2.7K — better42
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#39 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.6 — better17.6
Further details — not scored
Size29 MB4 MB
Age rating12+4+
DeveloperLW Brands, LLCRyan Olson

Customer experience

River Levels & Flows

All ratings2,655 ratings
Positive90.5%
Neutral4.2%
Negative5.2%
Written reviews76 reviews
Positive59.2%
Neutral7.9%
Negative32.9%

Blue Liner Flows

All ratings39 ratings
Positive89.7%
Neutral2.6%
Negative7.7%
Written reviews14 reviews
Positive64.3%
Neutral14.3%
Negative21.4%

Bugs and requests

River Levels & Flows

Reported bugs

2 issues
  • Saved gauges disappearing
  • Inability to add desired gauge stations

Requested features

5 requests
  • Add more river gauge stations
  • Allow sorting and organizing of favorite gauges
  • Provide option to switch between USGS and NOAA data
  • Implement customizable alert thresholds
  • Add water temperature data

Blue Liner Flows

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

River Levels & Flows

No in-app purchases

2 purchases

Blue Liner Flows

Subscriptions1
  • Premium Annual Subscription7 Days trial$6.991 Year
One-time1
  • Premium Lifetime Edition$19.99

Questions

Is River Levels & Flows free?
River Levels & Flows costs $2.99, with no in-app purchases.
Is Blue Liner Flows free?
Blue Liner Flows is free to download, with in-app purchases available.
Which has better reviews, River Levels & Flows or Blue Liner Flows?
Blue Liner Flows is rated higher. River Levels & Flows averages 4.6 out of 5 from 2.7K ratings, while Blue Liner Flows averages 4.7 from 42 ratings.
Do River Levels & Flows or Blue Liner Flows have ads?
Neither River Levels & Flows nor Blue Liner Flows shows ads.
Which is updated more often, River Levels & Flows or Blue Liner Flows?
River Levels & Flows ships an update every 3 months, and Blue Liner Flows weekly. Most recently, River Levels & Flows was updated on November 7, 2026 and Blue Liner Flows on November 3, 2026.

Other comparisons