# Xm Diagrams vs CrankData

The clearest difference is in-app purchases: Xm Diagrams at none against CrankData's 3. Xm Diagrams also leads on iOS requirement (15.6 vs 18.0). CrankData's advantage is update cadence (every 3 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. CrankData sells 3 in-app purchases, starting at $4.99 per month. Xm Diagrams asks for nothing beyond the download.

Xm Diagrams ships an update every 4 months, CrankData every 3 weeks. The most recent releases landed on October 14, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Xm Diagrams | CrankData |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/xm-diagrams/id1537327999/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 32 MB | 9 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [Tramontána Computing LLC](https://appshunter.io/developer/1537327710) | [Cameron Howard](https://appshunter.io/developer/1562404856) |

## What reviewers say

### Xm Diagrams

[App page](https://appshunter.io/ios/app/xm-diagrams/id1537327999)

Access detailed automotive information for the Citroën Xm, including schematic diagrams, wiring layouts, and technical data. Features include an ORGA calculator, error code readouts, and a fuse voltage drop calculator.

**Highlights:** Schematic diagrams and wiring layouts, Wiring harnesses information, Engine, fluids, and filter data, ORGA calculator, Error code readouts with explanations, Fuse voltage drop calculator, Printable circuit diagrams

**Features:** macOS Compatibility

**In-app purchases:** none


### CrankData

[App page](https://appshunter.io/ios/app/crankdata/id6796801718)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CrankData Pro Monthly | $4.99 | per month |
| Pro Yearly | $29.99 | per year |
| CrankData Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Xm Diagrams free?

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

### Is CrankData free?

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

### Do Xm Diagrams or CrankData have ads?

Neither Xm Diagrams nor CrankData shows ads.

### Which is updated more often, Xm Diagrams or CrankData?

Xm Diagrams ships an update every 4 months, and CrankData every 3 weeks. Most recently, Xm Diagrams was updated on October 14, 2026 and CrankData on October 25, 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.*