# Hole Busters 3D vs Stack 21

The clearest difference is in-app purchases: Stack 21 at none against Hole Busters 3D's 20. Stack 21 also leads on ads (none vs shown). Hole Busters 3D's advantage is chart position (#52 vs unranked) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Hole Busters 3D sells 20 one-off in-app purchases. Stack 21 asks for nothing beyond the download.

## The numbers

| Metric | Hole Busters 3D | Stack 21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (18K ratings)](https://appshunter.io/ios/app/hole-busters-3d/id6740718591/reviews)** | — |
| Number of ratings | **18K** | — |
| Positive reviews | 38.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 days | — |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#52** | — |
| Size | 726 MB | 3 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [FUNSEA LIMITED](https://appshunter.io/developer/1895255203) | [Doleman Enterprises](https://appshunter.io/developer/1453418600) |

## What reviewers say

### Hole Busters 3D

[App page](https://appshunter.io/ios/app/hole-busters-3d/id6740718591)

**Currently charting:** #52 Top Grossing · Casual, #61 Top Grossing · Puzzle, #162 Top Grossing · Games (US App Store)

Control a powerful black hole to swallow objects in various themed environments. Grow your black hole by devouring more items to overcome challenges. This game offers a relaxing yet brain-exercising experience with strategic puzzle-solving.

**Highlights:** Control a powerful black hole, Shuttle through different theme maps, Rationally arrange swallowing order, Black hole grows larger with each swallow, Richer theme maps and models, Upgrade your black hole indefinitely, Excellent physics and graphics

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

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CoinBundle1 | $1.99 | one-time |
| Endless Treasure03 | $2.99 | one-time |
| Endless Treasure10 | $4.99 | one-time |
| RemoveAds | $4.99 | one-time |
| BeginnerBundle | $4.99 | one-time |
| Merge Bundle | $7.99 | one-time |
| CoinBundle2 | $8.99 | one-time |
| Merge Bundle Silver | $9.99 | one-time |
| Silver Treasure Bundle | $9.99 | one-time |
| Hole Pass | $9.99 | one-time |
| RemoveAds2 | $9.99 | one-time |
| MasterBundle | $9.99 | one-time |
| CoinBundle3 | $13.99 | one-time |
| MegaBundle | $19.99 | one-time |
| CoinBundle4 | $27.99 | one-time |
| GiantBundle | $39.99 | one-time |
| CoinBundle5 | $54.99 | one-time |
| UltraBundle | $79.99 | one-time |
| LegendaryBundle | $99.99 | one-time |
| CoinBundle6 | $99.99 | one-time |

**What reviewers like**

- 🚀 Fun and satisfying gameplay
- 👍 Challenging levels
- 💡 Innovative mechanics

**What reviewers complain about**

- 🐛 Glitches and bugs in certain levels
- 🔍 Difficulty in reaching suspended items

**Reported bugs**

- Items suspended too high to collect in levels 198, 434, and 906
- Impossible to progress in level 198 due to suspended items

**Requested features**

- Fix level 198 glitch
- Fix level 434 bug
- Fix level 906 suspended items


### Stack 21

[App page](https://appshunter.io/ios/app/stack-21/id6819406129)

**In-app purchases:** none


## Frequently asked questions

### Is Hole Busters 3D free?

Hole Busters 3D is free to download, with in-app purchases available.

### Is Stack 21 free?

Stack 21 is free to download, with no in-app purchases.

### Do Hole Busters 3D or Stack 21 have ads?

Hole Busters 3D shows ads; Stack 21 does not.

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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.*