# iO vs 4=10

The clearest difference is rating: 4=10 at 4.9 against iO's 3.7. 4=10 also leads on review sentiment (98% vs 71%) and ratings volume (2.6K vs 19). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. iO sells 1 one-off in-app purchase and 4=10 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

4=10 holds the better App Store score, 4.9 against 3.7. That said, the two scores are not equally well evidenced: 4=10 has 2.6K ratings behind it against 19, so its average is the more settled of the two. Written reviews point the same way: 71% of iO's written reviews are positive against 98% of 4=10's.

iO ships an update every 6 weeks, 4=10 every 2 months. The most recent releases landed on October 15, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | iO | 4=10 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (19 ratings)](https://appshunter.io/ios/app/io-a-physics-platformer/id960831187/reviews) | **[4.9 (2.6K ratings)](https://appshunter.io/ios/app/410/id1609871477/reviews)** |
| Number of ratings | 19 | **2.6K** |
| Positive reviews | 71.1% of reviews | **97.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 466 MB | 33 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gamious B.V.](https://appshunter.io/developer/539181337) | [Sveinn Steinarsson](https://appshunter.io/developer/1477881290) |

## What reviewers say

### iO

[App page](https://appshunter.io/ios/app/io-a-physics-platformer/id960831187)

A physics-based platformer where you manipulate size, speed, and momentum to solve over 225 challenging mazes. Features unique gameplay mechanics like portals and inverted gravity, with global leaderboards for competitive play.

**Highlights:** Size, weight, and mass manipulation, Over 225 challenging mazes, Portals and inverted gravity, Global leaderboards, Unlockable achievements, Intuitive touch controls

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove all advertisements | $0.99 | one-time |

**What reviewers like**

- 👍 Fun and addictive gameplay
- 💡 Challenging puzzles
- 🧠 Good for brain exercise
- ✨ Great design and idea
- 💯 Addictive and engaging

**What reviewers complain about**

- ❌ Unplayable due to ads
- 💸 Paid for ad-free, still shows ads
- 🐛 Game crashes frequently
- 🐞 Buttons cut off on mobile
- 🔇 No audio or sound effects

**Reported bugs**

- Ads not unlocking levels
- Paid ad-free, but ads persist
- Game crashes on startup or during gameplay
- Buttons cut off at screen edges
- Player phasing through walls

**Requested features**

- Fix ad-blocking payment issue
- Improve mobile formatting
- Add audio and sound effects
- Fix ad-related progression blockers
- Address crashing issues


### 4=10

[App page](https://appshunter.io/ios/app/410/id1609871477)

A casual number puzzle game for all ages. Combine four given numbers using basic math operations to reach the target of 10. It offers a relaxing experience that improves mental math skills and number familiarity.

**Highlights:** Combine four numbers to equal 10, Basic math operations, Gradually increasing difficulty, One-handed play, Improves mental math skills, Relaxing and soothing gameplay

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 4≠10 add-on | $3.99 | one-time |

**What reviewers like**

- 👍 Simple and fun
- 🧠 Helps improve math skills
- 🔒 No ads or in-app purchases
- 💡 Challenging yet relaxing

**What reviewers complain about**

- 🤔 Some levels too easy
- 🤯 Can get repetitive at times

**Reported bugs**

- None reported

**Requested features**

- Add more difficulty levels
- Introduce new gameplay modes


## Frequently asked questions

### Is iO free?

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

### Is 4=10 free?

4=10 is free to download, with in-app purchases available.

### Which has better reviews, iO or 4=10?

4=10 is rated higher. iO averages 3.7 out of 5 from 19 ratings, while 4=10 averages 4.9 from 2.6K ratings.

### Do iO or 4=10 have ads?

Neither iO nor 4=10 shows ads.

### Which is updated more often, iO or 4=10?

iO ships an update every 6 weeks, and 4=10 every 2 months. Most recently, iO was updated on October 15, 2026 and 4=10 on October 17, 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.*