# Adopt vs EarthPi

The clearest difference is rating: Adopt at 5.0 against EarthPi's 4.4. Adopt also leads on in-app purchases (none vs 1) and review sentiment (100% vs 67%). EarthPi's advantage is update cadence (every 3 months vs every 40 months) and ratings volume (14 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. EarthPi sells 1 one-off in-app purchase. Adopt asks for nothing beyond the download.

Adopt holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: EarthPi has 14 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Adopt's written reviews are positive against 67% of EarthPi's.

Adopt ships an update every 40 months, EarthPi every 3 months. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Adopt | EarthPi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/adopt-a-float/id1473875623/reviews)** | [4.4 (14 ratings)](https://appshunter.io/ios/app/earthpi/id6741358020/reviews) |
| Number of ratings | 1 | **14** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 116 MB |
| Requires iOS | 17.5 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Frederik Simons](https://appshunter.io/developer/1687712314) | [Othman Alzahrani](https://appshunter.io/developer/1664580679) |

## What reviewers say

### Adopt

[App page](https://appshunter.io/ios/app/adopt-a-float/id1473875623)

Access real-time data from autonomous oceanographic floats that record seismic activity. View instrument locations, trajectories, and health parameters. This app provides a low-cost method for oceanic data collection.

**Highlights:** View MERMAID instrument locations, Access recent trajectories, Obtain ocean depth information, View instrumental metadata, Identify instruments by name and institution

**Features:** macOS Compatibility

**In-app purchases:** none


### EarthPi

[App page](https://appshunter.io/ios/app/earthpi/id6741358020)

Explore Earth with 27 interactive map projections. Visualize the planet from different angles, adjust time to see sunlight, and track celestial bodies. Save your discoveries with screenshot functionality.

**Highlights:** 27 Earth projections, Smooth projection transitions, Time control for sunlight simulation, Celestial tracking (sun and moon), Screenshot functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EarthPi Premium | $3.99 | one-time |


## Frequently asked questions

### Is Adopt free?

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

### Is EarthPi free?

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

### Which has better reviews, Adopt or EarthPi?

Adopt is rated higher. Adopt averages 5.0 out of 5 from 1 ratings, while EarthPi averages 4.4 from 14 ratings.

### Do Adopt or EarthPi have ads?

Neither Adopt nor EarthPi shows ads.

### Which is updated more often, Adopt or EarthPi?

Adopt ships an update every 40 months, and EarthPi every 3 months. Most recently, Adopt was updated on October 12, 2026 and EarthPi on October 15, 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.*