# back number vs Underbeat

The clearest difference is in-app purchases: Underbeat at none against back number's 2. back number's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. back number sells 2 in-app purchases, starting at $3.99 per month. Underbeat asks for nothing beyond the download.

## The numbers

| Metric | back number | Underbeat |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 21.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 161 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Fanplus, Inc.](https://appshunter.io/developer/427785206) | [DAH Optim Consulting SRL](https://appshunter.io/developer/1874274872) |

## What reviewers say

### back number

[App page](https://appshunter.io/ios/app/back-number/id1304228982)

Access the latest news and exclusive content from a popular music artist. Enjoy member-only movies and blog posts, all within a dedicated fan community app.

**Highlights:** Latest artist information, Fan club exclusive movies, Member-only blog posts, Official app content

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 「one room」月額会員 | $3.99 | per month |
| 「back number」 月額会員 | $6.00 | per month |


### Underbeat

[App page](https://appshunter.io/ios/app/underbeat/id6807733944)

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

**In-app purchases:** none


## Frequently asked questions

### Is back number free?

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

### Is Underbeat free?

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

### Do back number or Underbeat have ads?

Neither back number nor Underbeat shows ads.

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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.*