# US Ecotopia vs Doubtfolio

The clearest difference is in-app purchases: US Ecotopia at none against Doubtfolio's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Doubtfolio sells 4 one-off in-app purchases. US Ecotopia asks for nothing beyond the download.

US Ecotopia ships an update every 10 days, Doubtfolio every 5 days. The most recent releases landed on November 7, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | US Ecotopia | Doubtfolio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 5 days** |
| Size | 137 MB | 32 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Druid Tech, LLC](https://appshunter.io/developer/1683282655) | [Andreas Fetscher](https://appshunter.io/developer/1871941871) |

## What reviewers say

### US Ecotopia

[App page](https://appshunter.io/ios/app/us-ecotopia-animal-tracker/id6448024917)

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

**In-app purchases:** none


### Doubtfolio

[App page](https://appshunter.io/ios/app/doubtfolio/id6770167655)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Share Card | $0.99 | one-time |
| Full Case Report (PDF) | $2.99 | one-time |
| Report Card 10-Pack | $6.99 | one-time |
| Reality Scan Premium | $9.99 | one-time |


## Frequently asked questions

### Is US Ecotopia free?

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

### Is Doubtfolio free?

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

### Do US Ecotopia or Doubtfolio have ads?

Neither US Ecotopia nor Doubtfolio shows ads.

### Which is updated more often, US Ecotopia or Doubtfolio?

US Ecotopia ships an update every 10 days, and Doubtfolio every 5 days. Most recently, US Ecotopia was updated on November 7, 2026 and Doubtfolio on November 13, 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.*