# Sherlock PRO vs Nonograms Katana

The clearest difference is price: Nonograms Katana at Free against Sherlock PRO's $0.99. Nonograms Katana also leads on ratings volume (6.8K vs 17) and update cadence (every 3 months vs every 12 months). Sherlock PRO's advantage is in-app purchases (none vs 3) and iOS requirement (8.0 vs 14.0). On rating, review sentiment, ads and device support there is nothing between them.

Nonograms Katana is free to download; Sherlock PRO costs $0.99 up front. Nonograms Katana sells 3 one-off in-app purchases. Sherlock PRO asks for nothing beyond the download.

Sherlock PRO holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Nonograms Katana has 6.8K ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 85% of Sherlock PRO's written reviews are positive against 83% of Nonograms Katana's.

Sherlock PRO ships an update every 12 months, Nonograms Katana every 3 months. The most recent releases landed on October 24, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Sherlock PRO | Nonograms Katana |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (17 ratings)](https://appshunter.io/ios/app/sherlock-pro/id626273932/reviews)** | [4.8 (6.8K ratings)](https://appshunter.io/ios/app/nonograms-katana/id1037710023/reviews) |
| Number of ratings | 17 | **6.8K** |
| Positive reviews | **85.0% of reviews** | 82.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 6 MB | 27 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Everett Kaser Software](https://appshunter.io/developer/383644089) | [Ucdevs Interaction DOO](https://appshunter.io/developer/1037710022) |

## What reviewers say

### Sherlock PRO

[App page](https://appshunter.io/ios/app/sherlock-pro/id626273932)

Engage your deductive reasoning skills with this logic puzzle game. Solve intricate puzzles by deciphering clues to determine the exact placement of images within a grid. Offers hundreds of unique challenges across multiple grid sizes.

**Highlights:** Logic puzzle gameplay, Deductive reasoning challenges, Multiple grid sizes (4x4, 5x5, 6x6), Hundreds of unique puzzles, Graphical clue system

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

**In-app purchases:** none


### Nonograms Katana

[App page](https://appshunter.io/ios/app/nonograms-katana/id1037710023)

Engage in logic puzzles where you fill cells based on numerical clues to reveal hidden pictures. This app offers a vast collection of puzzles, tools for marking cells, and options to create and share your own challenges.

**Highlights:** 1001 nonogram puzzles, Create and share custom puzzles, Black-and-white and colored puzzles, Puzzles sorted by size, Hints and undo/redo functionality, Cloud save and achievements

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 80 Hints | $0.99 | one-time |
| 200 Hints | $1.99 | one-time |
| VIP version | $5.99 | one-time |

**What reviewers like**

- 👍 Lots of puzzles
- 👍 Customizable settings
- 👍 Minimal ads
- 👍 Challenging puzzles
- 👍 User-created puzzles

**What reviewers complain about**

- 🐛 Occasional crashes
- 🐛 Puzzle progress loss
- 🐛 Ads not working
- 🐛 Freezing issues
- 🐛 Compatibility problems

**Reported bugs**

- Puzzle progress not saving
- Puzzle images not loading
- Freezing/crashing on larger puzzles
- Ads not playing properly
- Compatibility issues with newer iOS versions

**Requested features**

- Dark mode option
- Ability to rearrange/move puzzle pieces
- Difficulty ratings for puzzles
- Automatic line/row completion
- Ability to follow/subscribe to users


## Frequently asked questions

### Is Sherlock PRO free?

Sherlock PRO costs $0.99, with no in-app purchases.

### Is Nonograms Katana free?

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

### Which has better reviews, Sherlock PRO or Nonograms Katana?

Sherlock PRO is rated higher. Sherlock PRO averages 5.0 out of 5 from 17 ratings, while Nonograms Katana averages 4.8 from 6.8K ratings.

### Do Sherlock PRO or Nonograms Katana have ads?

Neither Sherlock PRO nor Nonograms Katana shows ads.

### Which is updated more often, Sherlock PRO or Nonograms Katana?

Sherlock PRO ships an update every 12 months, and Nonograms Katana every 3 months. Most recently, Sherlock PRO was updated on October 24, 2026 and Nonograms Katana on November 2, 2026.

---

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