# Knife Master vs Gridsum

The clearest difference is in-app purchases: Knife Master at none against Gridsum's 1. Knife Master also leads on update cadence (every 2 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Gridsum sells 1 one-off in-app purchase. Knife Master asks for nothing beyond the download.

Knife Master ships an update every 2 days, Gridsum every 3 weeks. The most recent releases landed on September 30, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Knife Master | Gridsum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gridsum/id6770373881/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 206 MB | 64 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [3A YAPIM VE YAZILIM DANISMANLIK LIMITED SIRKETI](https://appshunter.io/developer/1493049868) | [Tyler Lewis](https://appshunter.io/developer/1896737710) |

## What reviewers say

### Knife Master

[App page](https://appshunter.io/ios/app/knife-master/id6760545929)

**Features:** Vision Pro support

**In-app purchases:** none


### Gridsum

[App page](https://appshunter.io/ios/app/gridsum/id6770373881)

Engage your mind with a pure logic number puzzle. Swap tiles to match target sums in distinct regions. Hundreds of handcrafted levels and daily challenges await, with global leaderboards to test your skills.

**Highlights:** Logic-based tile swapping, Target sum matching, Hundreds of handcrafted levels, Daily challenges, Global leaderboards, Distraction-free design, Accessibility options

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is Knife Master free?

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

### Is Gridsum free?

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

### Do Knife Master or Gridsum have ads?

Both Knife Master and Gridsum show ads.

### Which is updated more often, Knife Master or Gridsum?

Knife Master ships an update every 2 days, and Gridsum every 3 weeks. Most recently, Knife Master was updated on September 30, 2026 and Gridsum on October 9, 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.*