# FLEX vs Kattalo

The clearest difference is update cadence: Kattalo at every 9 days against FLEX's every 19 months. FLEX's advantage is device support (3 vs 1) and iOS requirement (9.3 vs 15.0). On price, ads and in-app purchases there is nothing between them.

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

FLEX ships an update every 19 months, Kattalo every 9 days. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | FLEX | Kattalo |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 7 MB | 64 MB |
| Requires iOS | **9.3** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Leripa AB](https://appshunter.io/developer/454449587) | [Kattalo AB](https://appshunter.io/developer/1530561419) |

## What reviewers say

### FLEX

[App page](https://appshunter.io/ios/app/flex-math-tools/id977115416)

This interactive educational tool helps teachers visualize basic math concepts like fractions and number lines. It allows for the creation of independent student projects and supplements math training programs. Enhance understanding of mathematical skills with various visual aids.

**Highlights:** Number lines visualization, Fraction tools, Number bonds, Number blocks, Create student projects, Mathematical symbols

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

**In-app purchases:** none


### Kattalo

[App page](https://appshunter.io/ios/app/kattalo/id1530561417)

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

**In-app purchases:** none


## Frequently asked questions

### Is FLEX free?

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

### Is Kattalo free?

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

### Do FLEX or Kattalo have ads?

Neither FLEX nor Kattalo shows ads.

### Which is updated more often, FLEX or Kattalo?

FLEX ships an update every 19 months, and Kattalo every 9 days. Most recently, FLEX was updated on October 16, 2026 and Kattalo on October 24, 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.*