# Killer Sudoku 6x6 vs SynapTap

The clearest difference is in-app purchases: SynapTap at none against Killer Sudoku 6x6's 1. SynapTap also leads on iOS requirement (15.0 vs 17.0). Killer Sudoku 6x6's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Killer Sudoku 6x6 sells 1 one-off in-app purchase. SynapTap asks for nothing beyond the download.

Killer Sudoku 6x6 ships an update every 4 days, SynapTap weekly. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Killer Sudoku 6x6 | SynapTap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/killer-sudoku-6x6/id6761444537/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 128 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Isaac Matarasso](https://appshunter.io/developer/1888271852) | [Emirhan Gireniz](https://appshunter.io/developer/1753585493) |

## What reviewers say

### Killer Sudoku 6x6

[App page](https://appshunter.io/ios/app/killer-sudoku-6x6/id6761444537)

Engage in addictive cage-sum puzzles on a compact 6x6 grid, perfect for quick play sessions. Offers multiple difficulty levels, helpful tools, and customization options. Enjoy offline play with no ads or data collection.

**Highlights:** 6x6 grid for quick play, 5 difficulty levels plus random, Built-in beginner guide, Pen & Pencil modes with smart candidates, Integrated calculator, Offline play, Customizable themes and haptic feedback

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Unlimited Play | $2.99 | one-time |


### SynapTap

[App page](https://appshunter.io/ios/app/synaptap/id6793103401)

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

**In-app purchases:** none


## Frequently asked questions

### Is Killer Sudoku 6x6 free?

Killer Sudoku 6x6 is free to download, with in-app purchases available.

### Is SynapTap free?

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

### Do Killer Sudoku 6x6 or SynapTap have ads?

SynapTap shows ads; Killer Sudoku 6x6 does not.

### Which is updated more often, Killer Sudoku 6x6 or SynapTap?

Killer Sudoku 6x6 ships an update every 4 days, and SynapTap weekly. Most recently, Killer Sudoku 6x6 was updated on October 31, 2026 and SynapTap on October 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.*