# iMammalia vs Nexio

The clearest difference is in-app purchases: iMammalia at none against Nexio's 3. iMammalia also leads on iOS requirement (14.0 vs 18.0). Nexio's advantage is update cadence (every 4 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Nexio sells 3 in-app purchases, starting at $0.99 per 7 days. iMammalia asks for nothing beyond the download.

iMammalia ships an update every 3 weeks, Nexio every 4 days. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | iMammalia | Nexio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/imammalia/id1480199644/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 51 MB | 340 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Centre for Ecology and Hydrology](https://appshunter.io/developer/986306797) | [YeeHaw IT & Webb AB](https://appshunter.io/developer/1729368795) |

## What reviewers say

### iMammalia

[App page](https://appshunter.io/ios/app/imammalia/id1480199644)

Record wild mammal sightings across Europe with this app. Submit your observations, with or without photos, for expert verification and contribute to mammal distribution mapping. All records can be managed and updated online.

**Highlights:** Record mammal sightings, Photo uploads optional, Expert verification of records, Contribute to distribution mapping, Online record management, Supports European countries

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

**In-app purchases:** none


### Nexio

[App page](https://appshunter.io/ios/app/nexio/id6670177819)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 week Subscription | $0.99 | per 7 days |
| 1 Year Subscription | $2.99 | per year |
| Lifetime - One-Time Purchase | $39.99 | one-time |


## Frequently asked questions

### Is iMammalia free?

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

### Is Nexio free?

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

### Do iMammalia or Nexio have ads?

Neither iMammalia nor Nexio shows ads.

### Which is updated more often, iMammalia or Nexio?

iMammalia ships an update every 3 weeks, and Nexio every 4 days. Most recently, iMammalia was updated on November 7, 2026 and Nexio on November 8, 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.*