# Block Tower vs Space Sum

The clearest difference is in-app purchases: Space Sum at none against Block Tower's 10. Space Sum also leads on ads (none vs shown) and update cadence (daily vs every 6 weeks). On price and device support there is nothing between them.

Both are free to download. Block Tower sells 10 in-app purchases, starting at $1.99 per 7 days. Space Sum asks for nothing beyond the download.

Block Tower ships an update every 6 weeks, Space Sum daily. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Block Tower | Space Sum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/block-tower-stack-builder/id1146253957/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Daily** |
| Monetization | Freemium | — |
| Size | 97 MB | 54 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sandeep Bhandari](https://appshunter.io/developer/794284640) | [sunshine software solution limited liability company](https://appshunter.io/developer/1569563959) |

## What reviewers say

### Block Tower

[App page](https://appshunter.io/ios/app/block-tower-stack-builder/id1146253957)

Build a towering structure by precisely dropping blocks one at a time. Master perfect landings to recover width and achieve new heights. Enjoy quick stacking rounds with local best tracking and customizable themes.

**Highlights:** One-tap block dropping, Perfect landing rewards, Local high score tracking, Multiple game modes, Seasonal themes, Widget integration

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Pro Weekly | $4.99 | per 7 days |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription Discount | $14.99 | per year |
| Yearly Subscription Sale | $14.99 | per year |
| Yearly Subscription Special | $19.99 | per year |
| Pro Annual | $29.99 | per year |
| Yearly Subscription | $29.99 | per year |
| Forever Pro Discount | $79.99 | one-time |
| Forever Pro | $99.99 | one-time |


### Space Sum

[App page](https://appshunter.io/ios/app/space-sum/id6447391627)

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

**In-app purchases:** none


## Frequently asked questions

### Is Block Tower free?

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

### Is Space Sum free?

Space Sum is free to download, with no in-app purchases.

### Do Block Tower or Space Sum have ads?

Block Tower shows ads; Space Sum does not.

### Which is updated more often, Block Tower or Space Sum?

Block Tower ships an update every 6 weeks, and Space Sum daily. Most recently, Block Tower was updated on October 2, 2026 and Space Sum on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*