# Killer Sudoku by Sudoku.com vs Tower Clock

The clearest difference is price: Killer Sudoku by Sudoku.com at Free against Tower Clock's $1.99. Killer Sudoku by Sudoku.com also leads on rating (4.7 vs 1.0) and update cadence (every 2 months vs every 23 months). Tower Clock's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Killer Sudoku by Sudoku.com is free to download; Tower Clock costs $1.99 up front. Killer Sudoku by Sudoku.com sells 1 one-off in-app purchase. Tower Clock asks for nothing beyond the download.

Killer Sudoku by Sudoku.com holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Killer Sudoku by Sudoku.com has 219K ratings behind it against 1, so its average is the more settled of the two.

Killer Sudoku by Sudoku.com ships an update every 2 months, Tower Clock every 23 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Killer Sudoku by Sudoku.com | Tower Clock |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.7 (219K ratings)](https://appshunter.io/ios/app/killer-sudoku-by-sudokucom/id1505735640/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/tower-clock/id1620700280/reviews) |
| Number of ratings | **219K** | 1 |
| Positive reviews | 44.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 23 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 237 MB | 5 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Easybrain Ltd](https://appshunter.io/developer/1190815537) | [Adam Kopec](https://appshunter.io/developer/1484248382) |

## What reviewers say

### Killer Sudoku by Sudoku.com

[App page](https://appshunter.io/ios/app/killer-sudoku-by-sudokucom/id1505735640)

Engage your mind with this number puzzle game, offering thousands of levels and daily challenges. It provides a unique twist on classic sudoku with cage-based sum puzzles, suitable for all skill levels. Hints and notes are available to help you master the game.

**Highlights:** Thousands of Killer Sudoku levels, Daily challenges with unique trophies, Seasonal events for special medals, Hints and notes for assistance, Enhanced gameplay for all skill levels, Brain-training puzzles

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Killer Sudoku No Ads | $14.99 | one-time |

**What reviewers like**

- 👍 Challenging game
- 🚀 Great time-filler
- 💡 Unique take on Sudoku
- 👍 Enjoyable experience
- 👍 Solid game play

**What reviewers complain about**

- 🔍 Too many ads
- 🔍 Ads interrupt gameplay
- 🐛 Bugs and glitches
- 🔍 Excessive ads for free version
- 🔍 Ads disrupt concentration

**Reported bugs**

- Incorrect puzzle solutions
- Scoring and stats issues
- Screen orientation problems
- Game freezing and crashing
- Unresponsive controls

**Requested features**

- Option to toggle number combinations
- Ability to lock correct numbers
- Improved hint system
- Customizable font and color options
- Progress sync between devices


### Tower Clock

[App page](https://appshunter.io/ios/app/tower-clock/id1620700280)

A digital companion for physical brick-stacking games, this app introduces new rules and time-based challenges. Compete against friends and the clock in a fun, interactive way.

**Highlights:** Companion app for physical games, New game rules, Timed challenges, Multiplayer support, Stacking gameplay

**In-app purchases:** none


## Frequently asked questions

### Is Killer Sudoku by Sudoku.com free?

Killer Sudoku by Sudoku.com is free to download, with in-app purchases available.

### Is Tower Clock free?

Tower Clock costs $1.99, with no in-app purchases.

### Which has better reviews, Killer Sudoku by Sudoku.com or Tower Clock?

Killer Sudoku by Sudoku.com is rated higher. Killer Sudoku by Sudoku.com averages 4.7 out of 5 from 219K ratings, while Tower Clock averages 1.0 from 1 ratings.

### Do Killer Sudoku by Sudoku.com or Tower Clock have ads?

Killer Sudoku by Sudoku.com shows ads; Tower Clock does not.

### Which is updated more often, Killer Sudoku by Sudoku.com or Tower Clock?

Killer Sudoku by Sudoku.com ships an update every 2 months, and Tower Clock every 23 months. Most recently, Killer Sudoku by Sudoku.com was updated on November 7, 2026 and Tower Clock on November 3, 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.*