# Удмуртия vs River Ruler

The clearest difference is in-app purchases: Удмуртия at none against River Ruler's 2. Удмуртия also leads on iOS requirement (12.0 vs 17.0). River Ruler's advantage is review sentiment (33% vs 0%). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. River Ruler sells 2 one-off in-app purchases. Удмуртия asks for nothing beyond the download.

Удмуртия ships an update every 9 days, River Ruler weekly. The most recent releases landed on October 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Удмуртия | River Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/river-ruler-length-and-map/id6793469300/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | — | Free |
| Size | 94 MB | 14 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ТО Парсуна](https://appshunter.io/developer/1677414462) | [Alex Pupko](https://appshunter.io/developer/1891763444) |

## What reviewers say

### Удмуртия

[App page](https://appshunter.io/ios/app/id6446329472)

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

**In-app purchases:** none


### River Ruler

[App page](https://appshunter.io/ios/app/river-ruler-length-and-map/id6793469300)

Measure river lengths precisely by following the actual riverbed, not a straight line. Get detailed trip data like flow, gradient, and estimated travel times for various watercraft and on foot. Export your measurements in multiple formats for GPS devices and mapping software.

**Highlights:** Measure river length along riverbed, View river source to mouth, Find rivers by name or coordinates, Analyze sinuosity, gradient, and discharge, Estimate travel time for kayak, SUP, or walking, Export measurements as GPX, KML, or PDF, Save measurement logs

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Unlock | $5.99 | one-time |
| RiverRuler lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Удмуртия free?

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

### Is River Ruler free?

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

### Do Удмуртия or River Ruler have ads?

Neither Удмуртия nor River Ruler shows ads.

### Which is updated more often, Удмуртия or River Ruler?

Удмуртия ships an update every 9 days, and River Ruler weekly. Most recently, Удмуртия was updated on October 4, 2026 and River Ruler 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.*