# STEM FLEX vs Science Bites

The clearest difference is in-app purchases: STEM FLEX at none against Science Bites's 2. STEM FLEX also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Science Bites sells 2 in-app purchases, starting at $0.99 per month. STEM FLEX asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on May 19, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | STEM FLEX | Science Bites |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 days | Every 5 days |
| Size | 30 MB | 49 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [FableVision, INC](https://appshunter.io/developer/330019981) | [Burak Arslan](https://appshunter.io/developer/1863855391) |

## What reviewers say

### STEM FLEX

[App page](https://appshunter.io/ios/app/stem-flex/id6744830195)

**Features:** macOS Compatibility

**In-app purchases:** none


### Science Bites

[App page](https://appshunter.io/ios/app/science-bites/id6756946276)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $0.99 | per month |
| Yearly Premium | $9.99 | per year |


## Frequently asked questions

### Is STEM FLEX free?

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

### Is Science Bites free?

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

### Do STEM FLEX or Science Bites have ads?

Science Bites shows ads; STEM FLEX does not.

### Which is updated more often, STEM FLEX or Science Bites?

STEM FLEX ships an update every 5 days, and Science Bites every 5 days. Most recently, STEM FLEX was updated on May 19, 2026 and Science Bites on September 11, 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.*