# MM Go vs Otus Game

The clearest difference is in-app purchases: Otus Game at none against MM Go's 3. Otus Game also leads on review sentiment (67% vs 33%) and update cadence (every 2 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. MM Go sells 3 one-off in-app purchases. Otus Game asks for nothing beyond the download.

MM Go ships an update every 2 months, Otus Game every 2 weeks. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | MM Go | Otus Game |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (22 ratings)](https://appshunter.io/ios/app/mm-go/id1378594859/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 33.3% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 119 MB | 174 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ruey-In Chiou](https://appshunter.io/developer/1378594858) | [EDENLUX Corp.](https://appshunter.io/developer/1443712682) |

## What reviewers say

### MM Go

[App page](https://appshunter.io/ios/app/mm-go/id1378594859)

Practice calculation skills with this math game designed for all ages. Compete against others, unlock levels, and earn rewards. It encourages brain exercise and offers a unique way to engage with mental math.

**Highlights:** Mental math practice, Unlockable levels, Multiplayer battles, User profiles, Avatar customization, Age group selection

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month of Prime Membership | $1.99 | one-time |
| 1.99 per Month | $1.99 | one-time |
| 19.99 per year | $19.99 | one-time |


### Otus Game

[App page](https://appshunter.io/ios/app/otus-game/id6476952932)

Engage in a variety of games designed to improve eye health and vision. Requires membership and eye score measurement through a companion app to begin playing.

**Highlights:** Eye exercise games, Vision improvement focus, Requires Otus Plus membership, Eye score measurement integration, Suitable for tired eyes

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

**In-app purchases:** none


## Frequently asked questions

### Is MM Go free?

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

### Is Otus Game free?

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

### Do MM Go or Otus Game have ads?

Neither MM Go nor Otus Game shows ads.

### Which is updated more often, MM Go or Otus Game?

MM Go ships an update every 2 months, and Otus Game every 2 weeks. Most recently, MM Go was updated on November 2, 2026 and Otus Game on November 4, 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.*