# Boulder King vs Slide Fit Stack

The clearest difference is in-app purchases: Slide Fit Stack at none against Boulder King's 2. Boulder King's advantage is update cadence (every 2 weeks vs every 47 months) and ratings volume (3 vs 1). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Boulder King sells 2 one-off in-app purchases. Slide Fit Stack asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Boulder King against 5.0 for Slide Fit Stack. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Boulder King ships an update every 2 weeks, Slide Fit Stack every 47 months. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Boulder King | Slide Fit Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/boulder-king/id1565734920/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/slide-fit-stack/id1611059114/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Every 47 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 131 MB | 77 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Allerton Apps](https://appshunter.io/developer/1842438016) | [Fernando Gonzalez Frias](https://appshunter.io/developer/582325220) |

## What reviewers say

### Boulder King

[App page](https://appshunter.io/ios/app/boulder-king/id1565734920)

A relaxing puzzle game where you strategically roll a boulder to smash rocks and clear levels. Master clever routes, use special mechanics, and enjoy a pure puzzle flow without timers or energy systems.

**Highlights:** Strategic boulder rolling, Rock smashing mechanics, Portal and key/lock puzzles, No timers or energy, 40 handcrafted levels, Endless Mode with difficulty options

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add 20 Hints | $0.99 | one-time |
| Remove Ads | $2.99 | one-time |


### Slide Fit Stack

[App page](https://appshunter.io/ios/app/slide-fit-stack/id1611059114)

Stack stone blocks as high as possible in this endless arcade game. Enjoy a simple, elegant design with progressive difficulty and offline play. Challenge friends to beat your world record.

**Highlights:** Infinite gameplay, Progressive difficulty, Simple and elegant UI, Offline play, Challenge friends

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Boulder King free?

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

### Is Slide Fit Stack free?

Slide Fit Stack is free to download, with no in-app purchases.

### Which has better reviews, Boulder King or Slide Fit Stack?

Boulder King and Slide Fit Stack are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do Boulder King or Slide Fit Stack have ads?

Both Boulder King and Slide Fit Stack show ads.

### Which is updated more often, Boulder King or Slide Fit Stack?

Boulder King ships an update every 2 weeks, and Slide Fit Stack every 47 months. Most recently, Boulder King was updated on October 7, 2026 and Slide Fit Stack on October 2, 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.*