# NineGaps vs Mathris

The clearest difference is ads: NineGaps at none against Mathris's shown. NineGaps also leads on iOS requirement (10.3 vs 15.0). Mathris's advantage is update cadence (every 5 weeks vs every 26 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NineGaps ships an update every 26 months, Mathris every 5 weeks. The most recent releases landed on October 22, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | NineGaps | Mathris |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (10 ratings)](https://appshunter.io/ios/app/ninegaps/id317223443/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 88.1% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 26 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 72 MB | 204 MB |
| Requires iOS | **10.3** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Quadion Technologies LLC](https://appshunter.io/developer/317223446) | [Nikita Ivanov](https://appshunter.io/developer/1681714188) |

## What reviewers say

### NineGaps

[App page](https://appshunter.io/ios/app/ninegaps/id317223443)

This is a challenging puzzle game where you place numbers 1-9 into gaps, matching operations. It offers a unique twist on number puzzles with multiple difficulty levels and endless replayability.

**Highlights:** Unique puzzle gameplay, Cute graphics, 5 difficulty levels, Unlimited puzzles, Leaderboards and achievements, GameCenter integration

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🧠 Excellent brain training and mental math improvement
- 🎮 Simple yet challenging gameplay mechanics
- 🎨 Clean, polished, and attractive visual design
- ⏱️ Quick games perfect for short waiting periods
- 👨‍👩‍👧‍👦 Suitable for multiple age groups and skill levels

**What reviewers complain about**

- 🔊 Loud sound effects that cannot be controlled properly
- 💾 No game saving feature when closing app
- 🧮 Does not follow proper order of operations (PEMDAS)
- 🔴 Occasional crashes or app not opening
- 🎮 Limited replay value after extended play

**Reported bugs**

- Sound effects stop working intermittently
- App crashes or fails to open on launch
- Sound volume settings not saving between sessions
- OpenFeint achievements not awarding properly
- Mathematical calculation errors in some puzzles

**Requested features**

- Solution/reveal button to show answers when stuck
- Hint system for difficult puzzles
- Game auto-save functionality
- Persistent sound settings across sessions
- Global leaderboards for competition


### Mathris

[App page](https://appshunter.io/ios/app/mathris-number-puzzle-game/id6447547073)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NineGaps free?

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

### Is Mathris free?

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

### Do NineGaps or Mathris have ads?

Mathris shows ads; NineGaps does not.

### Which is updated more often, NineGaps or Mathris?

NineGaps ships an update every 26 months, and Mathris every 5 weeks. Most recently, NineGaps was updated on October 22, 2026 and Mathris on October 15, 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.*