# PeakFlows vs River Rat

The clearest difference is update cadence: River Rat at every 10 days against PeakFlows's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PeakFlows ships an update monthly, River Rat every 10 days. The most recent releases landed on September 20, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | PeakFlows | River Rat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Size | 15 MB | 53 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mark Sheils](https://appshunter.io/developer/1885196448) | [Evil Twin Enterprises, LLC](https://appshunter.io/developer/6772654365) |

## What reviewers say

### PeakFlows

[App page](https://appshunter.io/ios/app/peakflows-river-levels/id6760589612)

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

**In-app purchases:** none


### River Rat

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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PeakFlows free?

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

### Is River Rat free?

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

### Do PeakFlows or River Rat have ads?

Neither PeakFlows nor River Rat shows ads.

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

PeakFlows ships an update monthly, and River Rat every 10 days. Most recently, PeakFlows was updated on September 20, 2026 and River Rat on August 22, 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.*