# STEM FLEX vs Mergosoft STEM

STEM FLEX and Mergosoft STEM 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 | STEM FLEX | Mergosoft STEM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Size | 30 MB | 34 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FableVision, INC](https://appshunter.io/developer/330019981) | [Mergosoft Private Limited](https://appshunter.io/developer/1895802354) |

## What reviewers say

### STEM FLEX

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Mergosoft STEM

[App page](https://appshunter.io/ios/app/mergosoft-stem/id6765621404)

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

**In-app purchases:** none


## Frequently asked questions

### Is STEM FLEX free?

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

### Is Mergosoft STEM free?

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

### Do STEM FLEX or Mergosoft STEM have ads?

Neither STEM FLEX nor Mergosoft STEM shows ads.

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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.*