# GhostTrail vs 都市伝説図書館

The clearest difference is in-app purchases: 都市伝説図書館 at none against GhostTrail's 3. 都市伝説図書館 also leads on update cadence (every 9 days vs monthly). GhostTrail's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. GhostTrail sells 3 one-off in-app purchases. 都市伝説図書館 asks for nothing beyond the download.

GhostTrail ships an update monthly, 都市伝説図書館 every 9 days. The most recent releases landed on October 14, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | GhostTrail | 都市伝説図書館 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 9 days** |
| Size | 14 MB | 11 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 9+ | 12+ |
| Developer | [Chih Han Lin](https://appshunter.io/developer/1800248325) | [Hiroaki Tajima](https://appshunter.io/developer/6788194651) |

## What reviewers say

### GhostTrail

[App page](https://appshunter.io/ios/app/ghosttrail-emf-ghost-hunter/id6771639973)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Signals | $0.99 | one-time |
| 12 Signals | $2.99 | one-time |
| 30 Signals | $5.99 | one-time |


### 都市伝説図書館

[App page](https://appshunter.io/ios/app/id6789458521)

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

**In-app purchases:** none


## Frequently asked questions

### Is GhostTrail free?

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

### Is 都市伝説図書館 free?

都市伝説図書館 is free to download, with no in-app purchases.

### Do GhostTrail or 都市伝説図書館 have ads?

都市伝説図書館 shows ads; GhostTrail does not.

### Which is updated more often, GhostTrail or 都市伝説図書館?

GhostTrail ships an update monthly, and 都市伝説図書館 every 9 days. Most recently, GhostTrail was updated on October 14, 2026 and 都市伝説図書館 on October 2, 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.*