# Blue Liner Flows vs UseDryTrails

The clearest difference is review sentiment: UseDryTrails at 100% against Blue Liner Flows's 64%. UseDryTrails also leads on in-app purchases (none vs 2) and rating (5.0 vs 4.7). Blue Liner Flows's advantage is update cadence (weekly vs every 15 months) and ratings volume (42 vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Blue Liner Flows sells 2 in-app purchases, starting at $6.99 per year. UseDryTrails asks for nothing beyond the download.

UseDryTrails holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Blue Liner Flows has 42 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 64% of Blue Liner Flows's written reviews are positive against 100% of UseDryTrails's.

Blue Liner Flows ships an update weekly, UseDryTrails every 15 months. The most recent releases landed on October 21, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Blue Liner Flows | UseDryTrails |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (42 ratings)](https://appshunter.io/ios/app/blue-liner-flows/id6464350766/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/usedrytrails/id6474069841/reviews)** |
| Number of ratings | **42** | 2 |
| Positive reviews | 64.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 15 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 4 MB | 1 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ryan Olson](https://appshunter.io/developer/605279068) | [Mike Whaley](https://appshunter.io/developer/1720535901) |

## What reviewers say

### Blue Liner Flows

[App page](https://appshunter.io/ios/app/blue-liner-flows/id6464350766)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Annual Subscription | $6.99 | per year |
| Premium Lifetime Edition | $19.99 | one-time |


### UseDryTrails

[App page](https://appshunter.io/ios/app/usedrytrails/id6474069841)

This app offers essential weather data for outdoor enthusiasts, including current conditions, temperature, sunrise/sunset times, and precipitation forecasts. It also provides soil moisture and temperature, with options for metric or standard units and saved locations.

**Highlights:** Current weather conditions, Temperature highs and lows, Sunrise and sunset times, Precipitation forecasts, Soil moisture and temperature, Metric/Standard unit options, Saved location functionality

**In-app purchases:** none


## Frequently asked questions

### Is Blue Liner Flows free?

Blue Liner Flows is free to download, with in-app purchases available.

### Is UseDryTrails free?

UseDryTrails is free to download, with no in-app purchases.

### Which has better reviews, Blue Liner Flows or UseDryTrails?

UseDryTrails is rated higher. Blue Liner Flows averages 4.7 out of 5 from 42 ratings, while UseDryTrails averages 5.0 from 2 ratings.

### Do Blue Liner Flows or UseDryTrails have ads?

Neither Blue Liner Flows nor UseDryTrails shows ads.

### Which is updated more often, Blue Liner Flows or UseDryTrails?

Blue Liner Flows ships an update weekly, and UseDryTrails every 15 months. Most recently, Blue Liner Flows was updated on October 21, 2026 and UseDryTrails on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*