# Chakra STEM vs Schaeffer Fellows Network

The clearest difference is device support: Chakra STEM at 3 against Schaeffer Fellows Network's 1. Chakra STEM also leads on iOS requirement (13.0 vs 16.4). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Chakra STEM ships an update monthly, Schaeffer Fellows Network every 3 weeks. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Chakra STEM | Schaeffer Fellows Network |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 57 MB | 101 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Ministry of Environment Cambodia](https://appshunter.io/developer/1727580743) | [University of Southern California Apps](https://appshunter.io/developer/540434445) |

## What reviewers say

### Chakra STEM

[App page](https://appshunter.io/ios/app/chakra-stem/id6504170842)

**Features:** macOS Compatibility

**In-app purchases:** none


### Schaeffer Fellows Network

[App page](https://appshunter.io/ios/app/schaeffer-fellows-network/id6749433709)

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

**In-app purchases:** none


## Frequently asked questions

### Is Chakra STEM free?

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

### Is Schaeffer Fellows Network free?

Schaeffer Fellows Network is free to download, with no in-app purchases.

### Do Chakra STEM or Schaeffer Fellows Network have ads?

Neither Chakra STEM nor Schaeffer Fellows Network shows ads.

### Which is updated more often, Chakra STEM or Schaeffer Fellows Network?

Chakra STEM ships an update monthly, and Schaeffer Fellows Network every 3 weeks. Most recently, Chakra STEM was updated on September 30, 2026 and Schaeffer Fellows Network on October 7, 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.*