# Unit Converter Max vs Optio

The clearest difference is rating: Unit Converter Max at 5.0 against Optio's 3.0. Unit Converter Max also leads on monetization model (free vs freemium) and ratings volume (26 vs 2). Optio's advantage is update cadence (every 9 days vs every 3 weeks). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Unit Converter Max sells 1 one-off in-app purchase and Optio sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Unit Converter Max holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Unit Converter Max has 26 ratings behind it against 2, so its average is the more settled of the two.

Unit Converter Max ships an update every 3 weeks, Optio every 9 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | Unit Converter Max | Optio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (26 ratings)](https://appshunter.io/ios/app/unit-converter-max/id6747881604/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/optio-ai-decision-maker-wheel/id6757300918/reviews) |
| Number of ratings | **26** | 2 |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | **Free** | Freemium |
| Size | 36 MB | 20 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rich Soft Co., Ltd](https://appshunter.io/developer/1499019813) | [HAKAN OZGER](https://appshunter.io/developer/1855495033) |

## What reviewers say

### Unit Converter Max

[App page](https://appshunter.io/ios/app/unit-converter-max/id6747881604)

This app offers fast and accurate conversions for over 30 unit categories and 150 world currencies. It features a clean interface, offline functionality, and light/dark modes, designed for travel, work, and everyday calculations.

**Highlights:** 30+ unit categories, 150+ world currencies, Offline unit conversion, Clean, easy-to-read interface, Light and dark mode, Fast and accurate results

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Converter Lifetime | $4.99 | one-time |


### Optio

[App page](https://appshunter.io/ios/app/optio-ai-decision-maker-wheel/id6757300918)

This app helps you make decisions with customizable wheels and quick random tools like coin flips and dice rolls. Enjoy a unique cyberpunk aesthetic and share results via QR codes. It offers a fun and fair way to resolve everyday choices.

**Highlights:** Customizable decision wheels, Random number generator, Coin flip and dice roll tools, Secret magic mode for influencing outcomes, Cyberpunk and neon aesthetics, QR code sharing of results

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Optio Pro (Monthly) | $2.99 | per month |
| Optio Pro (Yearly) | $17.99 | per year |
| 50 Neural Energy | $2.99 | one-time |
| 50 Neural Energy | $5.99 | one-time |


## Frequently asked questions

### Is Unit Converter Max free?

Unit Converter Max is free to download, with in-app purchases available.

### Is Optio free?

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

### Which has better reviews, Unit Converter Max or Optio?

Unit Converter Max is rated higher. Unit Converter Max averages 5.0 out of 5 from 26 ratings, while Optio averages 3.0 from 2 ratings.

### Do Unit Converter Max or Optio have ads?

Neither Unit Converter Max nor Optio shows ads.

### Which is updated more often, Unit Converter Max or Optio?

Unit Converter Max ships an update every 3 weeks, and Optio every 9 days. Most recently, Unit Converter Max was updated on November 5, 2026 and Optio on November 5, 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.*