# Number Slide Puzzle Challenge vs Equation =

The clearest difference is in-app purchases: Equation = at none against Number Slide Puzzle Challenge's 1. Equation = also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Number Slide Puzzle Challenge sells 1 one-off in-app purchase. Equation = asks for nothing beyond the download.

Number Slide Puzzle Challenge ships an update every 4 months, Equation = every 5 months. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Number Slide Puzzle Challenge | Equation = |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (66 ratings)](https://appshunter.io/ios/app/number-slide-puzzle-challenge/id1478371907/reviews)** | — |
| Number of ratings | **66** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 98 MB | 91 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [CHENGDU MIAOZHI TECHNOLOGY CO., LTD.](https://appshunter.io/developer/1465440799) | [Beijing Ningdom Technology Co., Ltd.](https://appshunter.io/developer/434217018) |

## What reviewers say

### Number Slide Puzzle Challenge

[App page](https://appshunter.io/ios/app/number-slide-puzzle-challenge/id1478371907)

Engage your mind with a classic number sliding puzzle. Arrange numbered tiles in order by sliding them into an empty space. Offers various grid sizes for endless challenges and brain stimulation.

**Highlights:** Classic number sliding puzzle gameplay, Tap and slide tile mechanics, Endless challenge mode, Multiple grid sizes (3x3 to 15x15), Brain stimulation and logic challenge, User-friendly controls and simple interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $5.99 | one-time |


### Equation =

[App page](https://appshunter.io/ios/app/equation/id6737338940)

**In-app purchases:** none


## Frequently asked questions

### Is Number Slide Puzzle Challenge free?

Number Slide Puzzle Challenge is free to download, with in-app purchases available.

### Is Equation = free?

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

### Do Number Slide Puzzle Challenge or Equation = have ads?

Both Number Slide Puzzle Challenge and Equation = show ads.

### Which is updated more often, Number Slide Puzzle Challenge or Equation =?

Number Slide Puzzle Challenge ships an update every 4 months, and Equation = every 5 months. Most recently, Number Slide Puzzle Challenge was updated on November 3, 2026 and Equation = on November 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*