# Back Pain Centre vs Chum

The clearest difference is in-app purchases: Back Pain Centre at none against Chum's 3. Chum's advantage is update cadence (every 3 weeks vs every 19 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Chum sells 3 in-app purchases, starting at $12.99 per month. Back Pain Centre asks for nothing beyond the download.

Back Pain Centre ships an update every 19 months, Chum every 3 weeks. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Back Pain Centre | Chum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 3 weeks** |
| Size | 45 MB | 9 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Vasily Enterprises Ltd](https://appshunter.io/developer/1773055750) | [Chum App Limited](https://appshunter.io/developer/1886776466) |

## What reviewers say

### Back Pain Centre

[App page](https://appshunter.io/ios/app/back-pain-centre/id6736685111)

**Features:** macOS Compatibility

**In-app purchases:** none


### Chum

[App page](https://appshunter.io/ios/app/chum/id6760918409)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chum Plus | $12.99 | per month |
| Chum Plus | $30.99 | per 3 months |
| Chum Plus | $105.99 | per year |


## Frequently asked questions

### Is Back Pain Centre free?

Back Pain Centre is free to download, with no in-app purchases.

### Is Chum free?

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

### Do Back Pain Centre or Chum have ads?

Neither Back Pain Centre nor Chum shows ads.

### Which is updated more often, Back Pain Centre or Chum?

Back Pain Centre ships an update every 19 months, and Chum every 3 weeks. Most recently, Back Pain Centre was updated on October 3, 2026 and Chum on October 8, 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.*