# Spine vs StretchFit

The clearest difference is in-app purchases: Spine at none against StretchFit's 1. Spine also leads on update cadence (every 3 weeks vs every 6 weeks). StretchFit's advantage is device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Both are free to download. StretchFit sells 1 in-app purchase, starting at $29.99 per month. Spine asks for nothing beyond the download.

Spine ships an update every 3 weeks, StretchFit every 6 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Spine | StretchFit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 62 MB | 154 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Martin Hermann](https://appshunter.io/developer/1713578524) | [Remote Coach Ltd](https://appshunter.io/developer/1457588518) |

## What reviewers say

### Spine

[App page](https://appshunter.io/ios/app/spine-check/id6449791021)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases:** none


### StretchFit

[App page](https://appshunter.io/ios/app/stretchfit/id6468877120)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $29.99 | per month |


## Frequently asked questions

### Is Spine free?

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

### Is StretchFit free?

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

### Do Spine or StretchFit have ads?

Neither Spine nor StretchFit shows ads.

### Which is updated more often, Spine or StretchFit?

Spine ships an update every 3 weeks, and StretchFit every 6 weeks. Most recently, Spine was updated on November 3, 2026 and StretchFit on October 30, 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.*