# Stack Tower vs Knotless

The clearest difference is update cadence: Knotless at every 3 weeks against Stack Tower's every 2 months. Stack Tower's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stack Tower sells 4 one-off in-app purchases and Knotless sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Stack Tower ships an update every 2 months, Knotless every 3 weeks. The most recent releases landed on October 29, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Stack Tower | Knotless |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/knotless-untangle-rope-3d/id6804435718/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 79 MB | 28 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Percy Ng'uni](https://appshunter.io/developer/1788450936) | [Ly Truong](https://appshunter.io/developer/1687270362) |

## What reviewers say

### Stack Tower

[App page](https://appshunter.io/ios/app/stack-tower-brick-builder/id6792844354)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coin Pouch | $0.99 | one-time |
| stack_tower_coins_1500 | $2.99 | one-time |
| Remove Ads Forever | $4.99 | one-time |
| Skyscraper Vault | $6.99 | one-time |


### Knotless

[App page](https://appshunter.io/ios/app/knotless-untangle-rope-3d/id6804435718)

Untangle ropes on a board by moving their ends to pegs. Solve puzzles with unlimited levels and multiple game modes. Customize your experience with different themes and rope styles.

**Highlights:** Unlimited levels, Campaign, Zen, Bundle, and Time Attack modes, Customizable themes and rope styles, Offline play, Hint and undo features, Colorblind patterns and left-handed layout

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 Coins | $0.99 | one-time |
| 1500 Coins | $1.99 | one-time |
| 4,000 Coins | $3.99 | one-time |
| 9,000 Coins | $4.99 | one-time |
| Remove Ads and 500 Coins | $5.99 | one-time |


## Frequently asked questions

### Is Stack Tower free?

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

### Is Knotless free?

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

### Do Stack Tower or Knotless have ads?

Both Stack Tower and Knotless show ads.

### Which is updated more often, Stack Tower or Knotless?

Stack Tower ships an update every 2 months, and Knotless every 3 weeks. Most recently, Stack Tower was updated on October 29, 2026 and Knotless on October 22, 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.*