# FLEX vs Evo by Ozobot

The clearest difference is review sentiment: Evo by Ozobot at 66% against FLEX's 0%. Evo by Ozobot also leads on update cadence (every 2 months vs every 19 months). FLEX's advantage is iOS requirement (9.3 vs 13.0). On price, ads, in-app purchases and monetization model 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, Evo by Ozobot every 2 months. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | FLEX | Evo by Ozobot |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (1.1K ratings)](https://appshunter.io/ios/app/evo-by-ozobot/id1145978152/reviews)** |
| Number of ratings | — | **1.1K** |
| Positive reviews | 0.0% of reviews | **66.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 7 MB | 239 MB |
| Requires iOS | **9.3** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Leripa AB](https://appshunter.io/developer/454449587) | [Evollve, Inc.](https://appshunter.io/developer/910831870) |

## 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


### Evo by Ozobot

[App page](https://appshunter.io/ios/app/evo-by-ozobot/id1145978152)

This app serves as a companion for learning and creating with a robot companion. It provides access to coding tools, classroom resources, and support to maximize the robot's capabilities for educational and home use.

**Highlights:** Learn with robot companion, Create with robot companion, Connect with robot companion, Ozobot Blockly access, Classroom resources, FAQs and support

**In-app purchases:** none

**What reviewers like**

- 🤩 Fun and engaging app
- 👍 User-friendly interface
- 💡 Innovative features like Ozoblockly programming
- 🤖 Great for learning about robotics and coding

**What reviewers complain about**

- 🐛 Frequent app crashes and bugs
- 🔧 Stripped of many features after recent update
- 🔋 Poor battery life for the Ozobot Evo
- 📱 Connectivity issues with the app and Ozobot

**Reported bugs**

- Firmware update bricking Ozobot devices
- Inability to connect and calibrate Ozobot with the app
- Saved programs not working after app updates

**Requested features**

- Bring back removed features like customization, tricks, and accounts
- Add battery percentage indicator for Ozobot Evo
- Improve app navigation and make key functions more accessible
- Expand programming and coding capabilities


## Frequently asked questions

### Is FLEX free?

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

### Is Evo by Ozobot free?

Evo by Ozobot is free to download, with no in-app purchases.

### Do FLEX or Evo by Ozobot have ads?

Neither FLEX nor Evo by Ozobot shows ads.

### Which is updated more often, FLEX or Evo by Ozobot?

FLEX ships an update every 19 months, and Evo by Ozobot every 2 months. Most recently, FLEX was updated on October 29, 2026 and Evo by Ozobot on October 21, 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.*