# Environmental Observer vs Cheyenne River Sioux Tribe

Environmental Observer and Cheyenne River Sioux Tribe are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Environmental Observer ships an update weekly, Cheyenne River Sioux Tribe every 2 weeks. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Environmental Observer | Cheyenne River Sioux Tribe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cheyenne-river-sioux-tribe/id6756069230/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | — | Free |
| Size | 31 MB | 372 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UCPM](https://appshunter.io/developer/1852819653) | [Jeremy Little Thunder](https://appshunter.io/developer/1858276737) |

## What reviewers say

### Environmental Observer

[App page](https://appshunter.io/ios/app/environmental-observer/id6755249283)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cheyenne River Sioux Tribe

[App page](https://appshunter.io/ios/app/cheyenne-river-sioux-tribe/id6756069230)

Access information about the Cheyenne River Sioux Tribe's government and programs. Stay updated on news and events happening within the CRST reservation and surrounding areas.

**Highlights:** Tribal government information, Tribal programs details, News updates, Event notifications, CRST reservation information

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

**In-app purchases:** none


## Frequently asked questions

### Is Environmental Observer free?

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

### Is Cheyenne River Sioux Tribe free?

Cheyenne River Sioux Tribe is free to download, with no in-app purchases.

### Do Environmental Observer or Cheyenne River Sioux Tribe have ads?

Neither Environmental Observer nor Cheyenne River Sioux Tribe shows ads.

### Which is updated more often, Environmental Observer or Cheyenne River Sioux Tribe?

Environmental Observer ships an update weekly, and Cheyenne River Sioux Tribe every 2 weeks. Most recently, Environmental Observer was updated on October 25, 2026 and Cheyenne River Sioux Tribe on October 28, 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.*