# Sudoku Professional vs Killer Aid

The clearest difference is in-app purchases: Killer Aid at none against Sudoku Professional's 3. Killer Aid also leads on ads (none vs shown) and review sentiment (100% vs 75%). Sudoku Professional's advantage is update cadence (every 6 weeks vs every 7 months). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. Sudoku Professional sells 3 one-off in-app purchases. Killer Aid asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Sudoku Professional against 4.9 for Killer Aid. That said, the two scores are not equally well evidenced: Killer Aid has 43 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 75% of Sudoku Professional's written reviews are positive against 100% of Killer Aid's.

Sudoku Professional ships an update every 6 weeks, Killer Aid every 7 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | Sudoku Professional | Killer Aid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sudoku-professional/id873896639/reviews)** | [4.9 (43 ratings)](https://appshunter.io/ios/app/killer-aid/id921229517/reviews) |
| Number of ratings | 2 | **43** |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 7 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 40 MB | 1 MB |
| Requires iOS | **12** | 12.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chris Guyler](https://appshunter.io/developer/687318530) | [Trevor Butler](https://appshunter.io/developer/921229516) |

## What reviewers say

### Sudoku Professional

[App page](https://appshunter.io/ios/app/sudoku-professional/id873896639)

This app offers an extensive collection of free Sudoku puzzles for all skill levels. It features an advanced help system, auto-note taking, and a user-friendly interface with pencil mode and a hint system. Save and resume multiple games, and enjoy daily challenges.

**Highlights:** Unlimited free Sudoku puzzles, Advanced help system, Auto Note feature, Pencil mode, Hint system, Save and resume multiple games, Daily games

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 Coins | $2.99 | one-time |
| 10000 Coins | $8.99 | one-time |
| Advert Free | $19.99 | one-time |


### Killer Aid

[App page](https://appshunter.io/ios/app/killer-aid/id921229517)

This app assists players in solving challenging Killer Sudoku puzzles by providing tools to calculate and filter number combinations for cages. It helps identify duplicate numbers and offers a calculator optimized for specific solving strategies.

**Highlights:** Cage combination calculation, Duplicate number highlighting, Filter tools (Exclude, Include AND, Include OR), Optimized calculator for Killer Sudoku, Help and strategy resources

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sudoku Professional free?

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

### Is Killer Aid free?

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

### Which has better reviews, Sudoku Professional or Killer Aid?

Sudoku Professional is rated higher. Sudoku Professional averages 5.0 out of 5 from 2 ratings, while Killer Aid averages 4.9 from 43 ratings.

### Do Sudoku Professional or Killer Aid have ads?

Sudoku Professional shows ads; Killer Aid does not.

### Which is updated more often, Sudoku Professional or Killer Aid?

Sudoku Professional ships an update every 6 weeks, and Killer Aid every 7 months. Most recently, Sudoku Professional was updated on November 1, 2026 and Killer Aid on November 1, 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.*