# SOS Explorer vs Watershed School

SOS Explorer and Watershed School are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support 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.

## The numbers

| Metric | SOS Explorer | Watershed School |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (20 ratings)](https://appshunter.io/ios/app/sos-explorer/id1358724422/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | — |
| Monetization | Free | — |
| Size | 249 MB | 31 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [University of Colorado Boulder](https://appshunter.io/developer/972210292) | [The Watershed School, Inc.](https://appshunter.io/developer/6776973133) |

## What reviewers say

### SOS Explorer

[App page](https://appshunter.io/ios/app/sos-explorer/id1358724422)

Explore interactive animated datasets of Earth and space phenomena, from planetary rings to climate change models. This app brings complex environmental processes to life in an intuitive and captivating way, making learning accessible anywhere.

**Highlights:** Streaming high-resolution datasets, Educational videos, User-guided tours, Analysis tools, 100+ datasets, Global and flat map views

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

**In-app purchases:** none


### Watershed School

[App page](https://appshunter.io/ios/app/watershed-school/id6776973131)

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

**In-app purchases:** none


## Frequently asked questions

### Is SOS Explorer free?

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

### Is Watershed School free?

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

### Do SOS Explorer or Watershed School have ads?

Neither SOS Explorer nor Watershed School shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*