# STEM FLEX vs Brainza

The clearest difference is in-app purchases: STEM FLEX at none against Brainza's 2. STEM FLEX also leads on update cadence (every 5 days vs fortnightly) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Brainza sells 2 in-app purchases, starting at $7.99 per 7 days. STEM FLEX asks for nothing beyond the download.

STEM FLEX ships an update every 5 days, Brainza fortnightly. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | STEM FLEX | Brainza |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/brainza-iq-training-and-tests/id6759095437/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 67 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [FableVision, INC](https://appshunter.io/developer/330019981) | [PL-CON LTD](https://appshunter.io/developer/1651205498) |

## What reviewers say

### STEM FLEX

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Brainza

[App page](https://appshunter.io/ios/app/brainza-iq-training-and-tests/id6759095437)

Enhance memory, logic, and focus with engaging games and tests. This app offers structured mental workouts to challenge different cognitive skills and help you understand your brain's strengths. Suitable for anyone seeking to stay mentally sharp and enjoy intellectual challenges.

**Highlights:** Memory improvement games, Logic puzzles and tests, Focus and attention exercises, IQ-style assessments, Daily mental workouts, Cognitive skill development

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week Trial subscription | $7.99 | per 7 days |
| Yearly Subscription | $39.99 | per year |


## Frequently asked questions

### Is STEM FLEX free?

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

### Is Brainza free?

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

### Do STEM FLEX or Brainza have ads?

Neither STEM FLEX nor Brainza shows ads.

### Which is updated more often, STEM FLEX or Brainza?

STEM FLEX ships an update every 5 days, and Brainza fortnightly. Most recently, STEM FLEX was updated on October 28, 2026 and Brainza on October 31, 2026.

---

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