# Concentrate! IQ Trainer vs Stroopy

The clearest difference is ads: Concentrate! IQ Trainer at none against Stroopy's shown. Concentrate! IQ Trainer also leads on update cadence (monthly vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Concentrate! IQ Trainer ships an update monthly, Stroopy every 3 months. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Concentrate! IQ Trainer | Stroopy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 3 months |
| Size | 31 MB | 28 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [christoph joshua BOLL](https://appshunter.io/developer/1631352653) | [OLE WebDesign](https://appshunter.io/developer/511936821) |

## What reviewers say

### Concentrate! IQ Trainer

[App page](https://appshunter.io/ios/app/concentrate-iq-trainer/id6738403503)

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

**In-app purchases:** none


### Stroopy

[App page](https://appshunter.io/ios/app/stroopy-mind-challenge/id6758552931)

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

**In-app purchases:** none


## Frequently asked questions

### Is Concentrate! IQ Trainer free?

Concentrate! IQ Trainer is free to download, with no in-app purchases.

### Is Stroopy free?

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

### Do Concentrate! IQ Trainer or Stroopy have ads?

Stroopy shows ads; Concentrate! IQ Trainer does not.

### Which is updated more often, Concentrate! IQ Trainer or Stroopy?

Concentrate! IQ Trainer ships an update monthly, and Stroopy every 3 months. Most recently, Concentrate! IQ Trainer was updated on September 8, 2026 and Stroopy on September 9, 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.*