# GTPool.io vs GrBubble

The clearest difference is in-app purchases: GTPool.io at none against GrBubble's 3. GrBubble's advantage is update cadence (every 2 days vs every 5 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. GrBubble sells 3 in-app purchases, starting at $3.99 per 7 days. GTPool.io asks for nothing beyond the download.

GTPool.io ships an update every 5 days, GrBubble every 2 days. The most recent releases landed on September 17, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | GTPool.io | GrBubble |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 2 days** |
| Size | 39 MB | 10 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Alexey Khrameev](https://appshunter.io/developer/1788930221) | [Chatmuu AI](https://appshunter.io/developer/1888388490) |

## What reviewers say

### GTPool.io

[App page](https://appshunter.io/ios/app/gtpoolio/id6740208645)

**Features:** macOS Compatibility

**In-app purchases:** none


### GrBubble

[App page](https://appshunter.io/ios/app/grbubble-ai-image-art/id6773016835)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| week vip | $3.99 | per 7 days |
| year vip | $14.99 | per year |
| lifetime vip | $19.99 | one-time |


## Frequently asked questions

### Is GTPool.io free?

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

### Is GrBubble free?

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

### Do GTPool.io or GrBubble have ads?

Neither GTPool.io nor GrBubble shows ads.

### Which is updated more often, GTPool.io or GrBubble?

GTPool.io ships an update every 5 days, and GrBubble every 2 days. Most recently, GTPool.io was updated on September 17, 2026 and GrBubble on September 15, 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.*