# CFSWater vs River Rat

The clearest difference is in-app purchases: CFSWater at none against River Rat's 2. CFSWater also leads on iOS requirement (11.0 vs 15.1). River Rat's advantage is update cadence (every 10 days vs every 13 months). On price, ads and device support there is nothing between them.

Both are free to download. River Rat sells 2 in-app purchases, starting at $4.99 per month. CFSWater asks for nothing beyond the download.

CFSWater ships an update every 13 months, River Rat every 10 days. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | CFSWater | River Rat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (9 ratings)](https://appshunter.io/ios/app/cfswater/id1660268618/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 28 MB | 53 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Keyhole Software LLC](https://appshunter.io/developer/537643862) | [Evil Twin Enterprises, LLC](https://appshunter.io/developer/6772654365) |

## What reviewers say

### CFSWater

[App page](https://appshunter.io/ios/app/cfswater/id1660268618)

Provides real-time and scheduled water release and power generation data for specific Army Corps of Engineer tailwaters. Includes current weather information for affected areas. Data is subject to change and may not always match estimated schedules.

**Highlights:** Water release reporting, Power generation data, Weather information, Army Corps of Engineer tailwaters, Scheduled and current data

**Features:** macOS Compatibility

**In-app purchases:** none


### River Rat

[App page](https://appshunter.io/ios/app/river-rat/id6772654363)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Annual | $39.99 | per year |


## Frequently asked questions

### Is CFSWater free?

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

### Is River Rat free?

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

### Do CFSWater or River Rat have ads?

Neither CFSWater nor River Rat shows ads.

### Which is updated more often, CFSWater or River Rat?

CFSWater ships an update every 13 months, and River Rat every 10 days. Most recently, CFSWater was updated on October 24, 2026 and River Rat on October 21, 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.*