# Zombie Math vs FLEX

The clearest difference is price: FLEX at Free against Zombie Math's $0.99. FLEX also leads on iOS requirement (9.3 vs 15.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

FLEX is free to download; Zombie Math costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Zombie Math ships an update every 27 months, FLEX every 19 months. The most recent releases landed on September 23, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Zombie Math | FLEX |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zombie-math/id813038993/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 19 months** |
| Monetization | Paid | **Free** |
| Size | 49 MB | 7 MB |
| Requires iOS | 15.6 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Leripa AB](https://appshunter.io/developer/454449587) |

## What reviewers say

### Zombie Math

[App page](https://appshunter.io/ios/app/zombie-math/id813038993)

Embark on a math adventure where you guide a zombie to the correct answers. Solve addition, subtraction, multiplication, and division problems that increase in difficulty. This engaging app makes practicing math skills fun and exciting for young learners.

**Highlights:** Zombie-themed math challenges, Tap to select correct answers, Addition, subtraction, multiplication, division, Increasing difficulty levels, Playful visuals and interactive gameplay, Builds math confidence

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Zombie Math free?

Zombie Math costs $0.99, with no in-app purchases.

### Is FLEX free?

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

### Do Zombie Math or FLEX have ads?

Neither Zombie Math nor FLEX shows ads.

### Which is updated more often, Zombie Math or FLEX?

Zombie Math ships an update every 27 months, and FLEX every 19 months. Most recently, Zombie Math was updated on September 23, 2026 and FLEX on September 29, 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.*