# River Rat — Know the river before you go

> Know the river before you go (iPhone/iPad app by Evil Twin Enterprises, LLC.)

- Source: https://appshunter.io/ios/app/river-rat/id6772654363 (this page in markdown: same URL + `.md`)
- Developer: [Evil Twin Enterprises, LLC](https://appshunter.io/developer/6772654365)
- Category: Sports
- Price: Free (on sale, was $4.99)
- Age rating: 4+
- Requires: iOS 15.1 · 53 MB
- Languages: American English
- Released: 2026-06-28
- Data updated: 2026-08-22
- User reviews in markdown: https://appshunter.io/ios/app/river-rat/id6772654363/reviews.md

## What is River Rat?

Montana rivers don't wait. River Rat gives paddlers, fly fishers, and rafters a clean read on 39 rivers across Montana and Idaho – before you load the truck.

Know if it's runnable, not just the CFS number.
Live readings are automatically classified: too low, bony, ideal, pushy, too high. You see the verdict, not just the number.

Plan a trip, not just a day.
Save your rivers. Open the Trip Planner, pick a date, and see which runs will be in shape. The weekend digest gives you the one-line read before you open anything.

Hatches: type, timing, and fly patterns.
Active, approaching, and fading windows by species – salmonflies, PMDs, caddis, and more – with fly patterns and timing notes built around water temperature, not calendar guesses.

What's in the detail view:
• Real-time water temperature + fish thermal stress alerts (67°F stress, 70°F danger)
• Water clarity signal with 24-hour trend
• Gage height
• Rapids and hazards with class ratings
• 7-day weather: air temp highs/lows and precip probability

Set alerts. Stop babysitting gauges.
Set a threshold – "notify me when the Blackfoot hits ideal" – and let it fire when conditions land. No polling required.

Everything saves locally.

39 rivers across Montana and Idaho. Built for the people who actually run them.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/


## Version history (last 5 releases)

### 1.1.1 — 2026-08-13

Updated mobile icon
Ran regression tests on future forecast accuracy

### 1.1.0 — 2026-07-27

minor bug fixes, added a paywall to enable subscriptions which were added several versions ago, also a 7-day trial

### 1.0.3 — 2026-07-01

Added subscriptions + forecast backtesting

### 1.0.2 — 2026-06-29

You can now subscribe monthly or annually to support River Rat and keep live river conditions flowing. Plus minor improvements and bug fixes.

### 1.0.1 — 2026-06-25

No release notes.

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## Related topics

[my sky river](https://appshunter.io/ios/topics/my-sky-river)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*