# Core Quality vs FlexApp Katwijk

The clearest difference is price: FlexApp Katwijk at Free against Core Quality's $4.99. Core Quality's advantage is iOS requirement (8.0 vs 11.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

FlexApp Katwijk is free to download; Core Quality costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Core Quality ships an update every 16 months, FlexApp Katwijk every 19 months. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Core Quality | FlexApp Katwijk |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 16 months** | Every 19 months |
| Monetization | Paid | — |
| Size | 10 MB | 37 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Core Quality International](https://appshunter.io/developer/662106636) | [Approxx B.V.](https://appshunter.io/developer/1340312349) |

## What reviewers say

### Core Quality

[App page](https://appshunter.io/ios/app/core-quality/id402438821)

Explore your strengths, weaknesses, learning points, and personal judgments through a self-analysis tool. This app helps you translate initial insights into daily practice for increased self-awareness and more meaningful interactions.

**Highlights:** 16-step self-analysis, Build and store core quadrants, Daily reflection module, Correlation analysis, Feedback on daily interactions, Translate insights into practice

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

**In-app purchases:** none


### FlexApp Katwijk

[App page](https://appshunter.io/ios/app/flexapp-katwijk/id1588364368)

**In-app purchases:** none


## Frequently asked questions

### Is Core Quality free?

Core Quality costs $4.99, with no in-app purchases.

### Is FlexApp Katwijk free?

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

### Do Core Quality or FlexApp Katwijk have ads?

Neither Core Quality nor FlexApp Katwijk shows ads.

### Which is updated more often, Core Quality or FlexApp Katwijk?

Core Quality ships an update every 16 months, and FlexApp Katwijk every 19 months. Most recently, Core Quality was updated on September 23, 2026 and FlexApp Katwijk on September 22, 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.*