# Tower Builder vs Gravity OB1

The clearest difference is ads: Gravity OB1 at none against Tower Builder's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Tower Builder sells 9 one-off in-app purchases and Gravity OB1 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Tower Builder ships an update every 3 days, Gravity OB1 every 5 days. The most recent releases landed on September 19, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Tower Builder | Gravity OB1 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tower-builder-stack-and-build/id6762039643/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 251 MB | 25 MB |
| Requires iOS | 14.0 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZENBYTE DIJITAL TEKNOLOJILER LIMITED SIRKETI](https://appshunter.io/developer/1751368688) | [Q8blog](https://appshunter.io/developer/380669318) |

## What reviewers say

### Tower Builder

[App page](https://appshunter.io/ios/app/tower-builder-stack-and-build/id6762039643)

Test your balance and precision in this addictive tower-building game. Strategically stack blocks to reach new heights, but be careful, one wrong move can cause it all to collapse. Unlock unique themes and master increasingly challenging levels.

**Highlights:** Realistic physics-based gameplay, Addictive stacking mechanics, Unlockable visual themes, Level-based progression, Increasing difficulty, Smooth controls

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Lives (30 min) | $0.99 | one-time |
| NoAds | $0.99 | one-time |
| Small Pack 1000 Stars | $0.99 | one-time |
| Victory FX Pack | $1.99 | one-time |
| Luxury Skins Pack | $1.99 | one-time |
| Architect Pack | $1.99 | one-time |
| Medium 3000 Stars | $1.99 | one-time |
| Large 5000 Stars | $2.99 | one-time |
| Premium Pack | $4.99 | one-time |


### Gravity OB1

[App page](https://appshunter.io/ios/app/gravity-ob1/id6788852525)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Game | $3.99 | one-time |


## Frequently asked questions

### Is Tower Builder free?

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

### Is Gravity OB1 free?

Gravity OB1 is free to download, with in-app purchases available.

### Do Tower Builder or Gravity OB1 have ads?

Tower Builder shows ads; Gravity OB1 does not.

### Which is updated more often, Tower Builder or Gravity OB1?

Tower Builder ships an update every 3 days, and Gravity OB1 every 5 days. Most recently, Tower Builder was updated on September 19, 2026 and Gravity OB1 on September 28, 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.*