# STEM JUNIOR vs Treebii

The clearest difference is in-app purchases: Treebii at none against STEM JUNIOR's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. STEM JUNIOR sells 4 one-off in-app purchases. Treebii asks for nothing beyond the download.

STEM JUNIOR ships an update every 3 weeks, Treebii every 2 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | STEM JUNIOR | Treebii |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 291 MB | 89 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [INSTITUTE VIETSTEM COMPANY LIMITED](https://appshunter.io/developer/1484787821) | [Dai Su Quach](https://appshunter.io/developer/1862073797) |

## What reviewers say

### STEM JUNIOR

[App page](https://appshunter.io/ios/app/stem-junior/id1484787823)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6 Months | $26.99 | one-time |
| 6 Months | $29.99 | one-time |
| 12 Months | $34.99 | one-time |
| 12 Months | $36.99 | one-time |


### Treebii

[App page](https://appshunter.io/ios/app/treebii-master-english/id6756645532)

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

**In-app purchases:** none


## Frequently asked questions

### Is STEM JUNIOR free?

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

### Is Treebii free?

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

### Do STEM JUNIOR or Treebii have ads?

Neither STEM JUNIOR nor Treebii shows ads.

### Which is updated more often, STEM JUNIOR or Treebii?

STEM JUNIOR ships an update every 3 weeks, and Treebii every 2 weeks. Most recently, STEM JUNIOR was updated on October 25, 2026 and Treebii on October 24, 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.*