# Grades Puzzle vs Slitherlink

The clearest difference is in-app purchases: Grades Puzzle at none against Slitherlink's 3. Grades Puzzle also leads on iOS requirement (13.0 vs 15.1). Slitherlink's advantage is update cadence (every 6 weeks vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. Slitherlink sells 3 one-off in-app purchases. Grades Puzzle asks for nothing beyond the download.

Grades Puzzle ships an update every 5 months, Slitherlink every 6 weeks. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Grades Puzzle | Slitherlink |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Size | 96 MB | 30 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Hieu Hoang](https://appshunter.io/developer/1108291419) | [LUKAS ANDREAS NILSEN](https://appshunter.io/developer/1866243718) |

## What reviewers say

### Grades Puzzle

[App page](https://appshunter.io/ios/app/grades-puzzle/id6748925132)

**Features:** macOS Compatibility

**In-app purchases:** none


### Slitherlink

[App page](https://appshunter.io/ios/app/slitherlink-puzzlemonster/id6790608832)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small tip | $0.99 | one-time |
| Medium tip | $1.99 | one-time |
| Large tip | $7.99 | one-time |


## Frequently asked questions

### Is Grades Puzzle free?

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

### Is Slitherlink free?

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

### Do Grades Puzzle or Slitherlink have ads?

Neither Grades Puzzle nor Slitherlink shows ads.

### Which is updated more often, Grades Puzzle or Slitherlink?

Grades Puzzle ships an update every 5 months, and Slitherlink every 6 weeks. Most recently, Grades Puzzle was updated on October 28, 2026 and Slitherlink on November 5, 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.*