# Purify the World vs BubbleBlockBlast

The clearest difference is in-app purchases: BubbleBlockBlast at none against Purify the World's 7. BubbleBlockBlast also leads on update cadence (every 2 weeks vs every 5 weeks). Purify the World's advantage is review sentiment (25% vs 0%) and iOS requirement (13.0 vs 15.0). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Purify the World sells 7 one-off in-app purchases. BubbleBlockBlast asks for nothing beyond the download.

Purify the World ships an update every 5 weeks, BubbleBlockBlast every 2 weeks. The most recent releases landed on September 17, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Purify the World | BubbleBlockBlast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/purify-the-world/id6739110940/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **25.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 301 MB | 305 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Eureka Studio Inc.](https://appshunter.io/developer/1418633832) | [xpup](https://appshunter.io/developer/1896676871) |

## What reviewers say

### Purify the World

[App page](https://appshunter.io/ios/app/purify-the-world/id6739110940)

Survive a zombie-infested world by collecting DNA, developing a vaccine, and collaborating with other survivors. Your mission is to cleanse the contaminated land and rebuild society.

**Highlights:** Zombie DNA collection and study, Vaccine creation and deployment, Contaminated surface purification, Cooperative survival gameplay, Post-apocalyptic world exploration

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Handful of Tickets | $1.99 | one-time |
| World Pack 1 | $2.99 | one-time |
| Remove Ads | $3.99 | one-time |
| Bundle of Tickets | $4.99 | one-time |
| World Pack 1 - Before Discount | $9.99 | one-time |
| Stack of Tickets | $14.99 | one-time |
| Mountain of Tickets | $49.99 | one-time |


### BubbleBlockBlast

[App page](https://appshunter.io/ios/app/bubbleblockblast/id6770799023)

Engage in a refreshing puzzle game where you strategically place falling blocks to clear lines and achieve high scores. Enjoy daily rewards and two distinct game modes for endless brain-training fun.

**Highlights:** Random bubble block placement, Easy drag-and-drop controls, Combo and high score mechanics, Ocean-themed visual design, Classic and Mission game modes, Daily rewards and lucky roulette

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

**In-app purchases:** none


## Frequently asked questions

### Is Purify the World free?

Purify the World is free to download, with in-app purchases available.

### Is BubbleBlockBlast free?

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

### Do Purify the World or BubbleBlockBlast have ads?

Both Purify the World and BubbleBlockBlast show ads.

### Which is updated more often, Purify the World or BubbleBlockBlast?

Purify the World ships an update every 5 weeks, and BubbleBlockBlast every 2 weeks. Most recently, Purify the World was updated on September 17, 2026 and BubbleBlockBlast on September 26, 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.*