# Envirothon25 vs STEM Exchange 2025

Envirothon25 and STEM Exchange 2025 are too close to call on the numbers: across 3 compared parameters — price, in-app purchases and iOS requirement 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 | Envirothon25 | STEM Exchange 2025 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Size | 22 MB | 21 MB |
| Requires iOS | 16.1 | 16.1 |
| Age rating | 4+ | 4+ |
| Developer | [National Conservation Foundation, Inc.](https://appshunter.io/developer/1692980168) | [RTI International](https://appshunter.io/developer/549719529) |

## What reviewers say

### Envirothon25

[App page](https://appshunter.io/ios/app/envirothon25/id6746054246)

**In-app purchases:** none


### STEM Exchange 2025

[App page](https://appshunter.io/ios/app/stem-exchange-2025/id6749871299)

**In-app purchases:** none


## Frequently asked questions

### Is Envirothon25 free?

Envirothon25 is free to download, with no in-app purchases.

### Is STEM Exchange 2025 free?

STEM Exchange 2025 is free to download, with no in-app purchases.

---

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