# 4=10 vs Déjà Vu

The clearest difference is in-app purchases: Déjà Vu at none against 4=10's 1. Déjà Vu also leads on update cadence (weekly vs every 2 months). 4=10's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. 4=10 sells 1 one-off in-app purchase. Déjà Vu asks for nothing beyond the download.

4=10 ships an update every 2 months, Déjà Vu weekly. The most recent releases landed on October 10, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | 4=10 | Déjà Vu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (2.6K ratings)](https://appshunter.io/ios/app/410/id1609871477/reviews)** | — |
| Number of ratings | **2.6K** | — |
| Positive reviews | 97.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 10 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Sveinn Steinarsson](https://appshunter.io/developer/1477881290) | [Ozgur Baskin](https://appshunter.io/developer/6784824862) |

## What reviewers say

### 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


### Déjà Vu

[App page](https://appshunter.io/ios/app/deja-vu-same-level/id6786274753)

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

**In-app purchases:** none


## Frequently asked questions

### Is 4=10 free?

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

### Is Déjà Vu free?

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

### Do 4=10 or Déjà Vu have ads?

Déjà Vu shows ads; 4=10 does not.

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

4=10 ships an update every 2 months, and Déjà Vu weekly. Most recently, 4=10 was updated on October 10, 2026 and Déjà Vu on September 29, 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.*