# 블랙홀제이 vs GRACE U

The clearest difference is ads: 블랙홀제이 at none against GRACE U's shown. GRACE U's advantage is update cadence (every 2 months vs every 5 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

블랙홀제이 ships an update every 5 months, GRACE U every 2 months. The most recent releases landed on September 8, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | 블랙홀제이 | GRACE U |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Size | 20 MB | 73 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AE JIN JO](https://appshunter.io/developer/1407602267) | [GRACE U Inc.](https://appshunter.io/developer/1639029266) |

## What reviewers say

### 블랙홀제이

[App page](https://appshunter.io/ios/app/id1160624415)

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

**In-app purchases:** none


### GRACE U

[App page](https://appshunter.io/ios/app/grace-u/id1639029264)

**In-app purchases:** none


## Frequently asked questions

### Is 블랙홀제이 free?

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

### Is GRACE U free?

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

### Do 블랙홀제이 or GRACE U have ads?

GRACE U shows ads; 블랙홀제이 does not.

### Which is updated more often, 블랙홀제이 or GRACE U?

블랙홀제이 ships an update every 5 months, and GRACE U every 2 months. Most recently, 블랙홀제이 was updated on September 8, 2026 and GRACE U on May 18, 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.*