# Professional Spares vs Composants Diffusion

Professional Spares and Composants Diffusion are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Professional Spares ships an update every 3 weeks, Composants Diffusion every 2 weeks. The most recent releases landed on September 8, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Professional Spares | Composants Diffusion |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 63 MB | 45 MB |
| Requires iOS | **15.5** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Professional Spares](https://appshunter.io/developer/1709663385) | [Composants Diffusion](https://appshunter.io/developer/1089863409) |

## What reviewers say

### Professional Spares

[App page](https://appshunter.io/ios/app/professional-spares/id6468263576)

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

**In-app purchases:** none


### Composants Diffusion

[App page](https://appshunter.io/ios/app/composants-diffusion/id6499010013)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Professional Spares free?

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

### Is Composants Diffusion free?

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

### Do Professional Spares or Composants Diffusion have ads?

Neither Professional Spares nor Composants Diffusion shows ads.

### Which is updated more often, Professional Spares or Composants Diffusion?

Professional Spares ships an update every 3 weeks, and Composants Diffusion every 2 weeks. Most recently, Professional Spares was updated on September 8, 2026 and Composants Diffusion on September 23, 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.*