# FLEX vs Instrulio

The clearest difference is in-app purchases: FLEX at none against Instrulio's 1. FLEX also leads on iOS requirement (9.3 vs 17.0). Instrulio's advantage is update cadence (every 2 days vs every 19 months). On price, ads and device support there is nothing between them.

Both are free to download. Instrulio sells 1 one-off in-app purchase. FLEX asks for nothing beyond the download.

FLEX ships an update every 19 months, Instrulio every 2 days. The most recent releases landed on September 29, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | FLEX | Instrulio |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 7 MB | 5 MB |
| Requires iOS | **9.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Leripa AB](https://appshunter.io/developer/454449587) | [MALIN BIRGITTA BROBERG](https://appshunter.io/developer/6804937085) |

## 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


### Instrulio

[App page](https://appshunter.io/ios/app/instrulio/id6811355485)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Creation | $5.99 | one-time |


## Frequently asked questions

### Is FLEX free?

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

### Is Instrulio free?

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

### Do FLEX or Instrulio have ads?

Neither FLEX nor Instrulio shows ads.

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

FLEX ships an update every 19 months, and Instrulio every 2 days. Most recently, FLEX was updated on September 29, 2026 and Instrulio on October 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.*