# Thunderbird Strike vs Not Evil Sudoku

The clearest difference is in-app purchases: Thunderbird Strike at none against Not Evil Sudoku's 1. Thunderbird Strike also leads on iOS requirement (7.0 vs 15). Not Evil Sudoku's advantage is rating (4.6 vs 4.2) and review sentiment (75% vs 53%). On price, ads and device support there is nothing between them.

Both are free to download. Not Evil Sudoku sells 1 one-off in-app purchase. Thunderbird Strike asks for nothing beyond the download.

Not Evil Sudoku holds the better App Store score, 4.6 against 4.2. That said, the two scores are not equally well evidenced: Not Evil Sudoku has 1.1K ratings behind it against 39, so its average is the more settled of the two. Written reviews point the same way: 53% of Thunderbird Strike's written reviews are positive against 75% of Not Evil Sudoku's.

## The numbers

| Metric | Thunderbird Strike | Not Evil Sudoku |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (39 ratings)](https://appshunter.io/ios/app/thunderbird-strike/id1324427411/reviews) | **[4.6 (1.1K ratings)](https://appshunter.io/ios/app/not-evil-sudoku/id1614071642/reviews)** |
| Number of ratings | 39 | **1.1K** |
| Positive reviews | 52.9% of reviews | **74.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Monetization | **Free** | Freemium |
| Size | 614 MB | 23 MB |
| Requires iOS | **7.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Elizabeth LaPensee](https://appshunter.io/developer/1036628855) | [Ashish Selvaraj](https://appshunter.io/developer/1614070948) |

## What reviewers say

### Thunderbird Strike

[App page](https://appshunter.io/ios/app/thunderbird-strike/id1324427411)

Fly as a thunderbird in this 2D sidescroller, defending Turtle Island from a destructive snake. Use searing lightning to protect the lands and waters from the Great Lakes to the Tar Sands.

**Highlights:** 2D sidescrolling gameplay, Play as a thunderbird, Defend Turtle Island, Use lightning attacks, Protect lands and waters

**Features:** macOS Compatibility

**In-app purchases:** none


### Not Evil Sudoku

[App page](https://appshunter.io/ios/app/not-evil-sudoku/id1614071642)

Enjoy a distraction-free Sudoku experience with helpful features like hints and real-time validation. Track your progress, compete globally, and customize the app with themes. Play daily puzzles for free or upgrade for unlimited games and advanced statistics.

**Highlights:** Fully offline play, No ads or distractions, Real-time move validation, Shake for hints, Daily puzzles with leaderboards, Customizable themes and icons, Notes and auto-clear notes

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |

**What reviewers like**

- 🚀 Clean, minimalistic design
- 🔒 No ads or tracking
- 👍 Customizable features
- 👍 Good puzzle difficulty
- 👍 Helpful community

**What reviewers complain about**

- 🐛 Disappearing numbers glitch
- 🐛 App icon doesn't change for dark mode
- ⏱️ Limit of one game per day on free version
- 💰 Paid version considered expensive by some

**Reported bugs**

- Disappearing numbers when closing the app
- Numbers swapping to incorrect spots

**Requested features**

- Add auto-clear notes option without move validation
- Provide more theme color options
- Implement a 'warm' mode similar to other sudoku apps
- Add ability to remove notes after number is placed
- Highlight all instances of a number in the puzzle


## Frequently asked questions

### Is Thunderbird Strike free?

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

### Is Not Evil Sudoku free?

Not Evil Sudoku is free to download, with in-app purchases available.

### Which has better reviews, Thunderbird Strike or Not Evil Sudoku?

Not Evil Sudoku is rated higher. Thunderbird Strike averages 4.2 out of 5 from 39 ratings, while Not Evil Sudoku averages 4.6 from 1.1K ratings.

### Do Thunderbird Strike or Not Evil Sudoku have ads?

Neither Thunderbird Strike nor Not Evil Sudoku shows ads.

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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.*