# Spineworks Chiropractic vs 21Studio

The clearest difference is device support: 21Studio at 3 against Spineworks Chiropractic's 1. 21Studio also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Spineworks Chiropractic ships an update every 3 weeks, 21Studio every 6 weeks. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Spineworks Chiropractic | 21Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 98 MB | 21 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Spineworks Chiropractic Ltd](https://appshunter.io/developer/1822260046) | [Ali Ather](https://appshunter.io/developer/1848166219) |

## What reviewers say

### Spineworks Chiropractic

[App page](https://appshunter.io/ios/app/spineworks-chiropractic/id6747667401)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### 21Studio

[App page](https://appshunter.io/ios/app/21studio/id6754393185)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spineworks Chiropractic free?

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

### Is 21Studio free?

21Studio is free to download, with no in-app purchases.

### Do Spineworks Chiropractic or 21Studio have ads?

Neither Spineworks Chiropractic nor 21Studio shows ads.

### Which is updated more often, Spineworks Chiropractic or 21Studio?

Spineworks Chiropractic ships an update every 3 weeks, and 21Studio every 6 weeks. Most recently, Spineworks Chiropractic was updated on September 30, 2026 and 21Studio on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*