# FloodWatch vs Blue Liner Flows

The clearest difference is ads: Blue Liner Flows at none against FloodWatch's shown. Blue Liner Flows also leads on update cadence (weekly vs every 2 months) and chart position (#191 vs unranked). FloodWatch's advantage is ratings volume (328 vs 42). On price, rating, review sentiment and in-app purchases there is nothing between them.

Both are free to download. FloodWatch sells 5 one-off in-app purchases 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 — 4.7 for FloodWatch against 4.7 for Blue Liner Flows. That said, the two scores are not equally well evidenced: FloodWatch has 328 ratings behind it against 42, so its average is the more settled of the two. Written reviews are what separate them: 58% of FloodWatch's written reviews are positive against 64% of Blue Liner Flows's.

FloodWatch ships an update every 2 months, Blue Liner Flows weekly. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | FloodWatch | Blue Liner Flows |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (328 ratings)](https://appshunter.io/ios/app/floodwatch/id386505889/reviews) | **[4.7 (42 ratings)](https://appshunter.io/ios/app/blue-liner-flows/id6464350766/reviews)** |
| Number of ratings | **328** | 42 |
| Positive reviews | 58.3% of reviews | **64.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | — | **#191** |
| Size | 16 MB | 4 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Brian Deshong](https://appshunter.io/developer/386505892) | [Ryan Olson](https://appshunter.io/developer/605279068) |

## What reviewers say

### FloodWatch

[App page](https://appshunter.io/ios/app/floodwatch/id386505889)

Monitor real-time river and flood data across the United States. Track river height, discharge, precipitation, and water temperature with data from USGS and NWS. Ideal for property owners, outdoor enthusiasts, and anyone needing flood awareness.

**Highlights:** Real-time river data, Historical trends and graphs, Favorites list for gauges, Nationwide US coverage, Flood awareness alerts, Recreation water condition checks

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip Level 1 | $0.99 | one-time |
| Tip Level 2 | $2.99 | one-time |
| Tip Level 3 | $5.99 | one-time |
| Ad Removal | $8.99 | one-time |
| Tip Level 4 | $9.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 👍 Great information
- 👍 Useful tool
- 👍 Works as advertised
- 👍 Responsive developer

**What reviewers complain about**

-  anúncios Intrusive ads
-  anúncios Loud and disruptive ads
-  anúncios Full-page ads
-  anúncios Ads prevent app usage
- 💰 Expensive ad-free option

**Reported bugs**

- App crashes on opening
- App crashes when updating levels
- App crashes when scrolling through favorites
- App crashes a lot
- App kicks out when viewing favorites

**Requested features**

- Add alerts for flood stage
- Add Lock Screen widgets
- Add search bar for gauges
- Add CFS readings
- Add alerts for flow rate


### Blue Liner Flows

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

**Currently charting:** #191 Top Grossing · Weather (US App Store)

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 |


## Frequently asked questions

### Is FloodWatch free?

FloodWatch is free to download, with in-app purchases available.

### Is Blue Liner Flows free?

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

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

Blue Liner Flows is rated higher. FloodWatch averages 4.7 out of 5 from 328 ratings, while Blue Liner Flows averages 4.7 from 42 ratings.

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

FloodWatch shows ads; Blue Liner Flows does not.

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

FloodWatch ships an update every 2 months, and Blue Liner Flows weekly. Most recently, FloodWatch was updated on October 27, 2026 and Blue Liner Flows on October 25, 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.*