# Quad OPMS vs DOCFIX

The clearest difference is in-app purchases: Quad OPMS at none against DOCFIX's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DOCFIX sells 3 one-off in-app purchases. Quad OPMS asks for nothing beyond the download.

Quad OPMS ships an update every 3 months, DOCFIX every 2 months. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Quad OPMS | DOCFIX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/docfix-auto-repair-guide/id6742226234/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 36 MB | 77 MB |
| Requires iOS | **12.0** | 13 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Autosys Industrial Solutions Private Limited](https://appshunter.io/developer/1703269777) | [Nam Nguyen Tien](https://appshunter.io/developer/1785840657) |

## What reviewers say

### Quad OPMS

[App page](https://appshunter.io/ios/app/quad-opms/id6470180247)

**In-app purchases:** none


### DOCFIX

[App page](https://appshunter.io/ios/app/docfix-auto-repair-guide/id6742226234)

Access comprehensive automotive repair manuals, wiring diagrams, and diagnostic procedures for a wide range of vehicles. Quickly find solutions for engine, electrical, and maintenance issues with step-by-step guides and expert recommendations.

**Highlights:** Comprehensive repair manuals, Wiring diagrams and schematics, Diagnostic trouble codes (DTCs) and fixes, Component location and specifications, Maintenance schedules and fluid capacities, Fast and accurate search, Regular updates

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DOCFIX 1 MONTH | $4.00 | one-time |
| DOCFIX 6 MONTHS | $20.00 | one-time |
| DOCFIX 12 MONTHS | $38.00 | one-time |


## Frequently asked questions

### Is Quad OPMS free?

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

### Is DOCFIX free?

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

### Do Quad OPMS or DOCFIX have ads?

Neither Quad OPMS nor DOCFIX shows ads.

### Which is updated more often, Quad OPMS or DOCFIX?

Quad OPMS ships an update every 3 months, and DOCFIX every 2 months. Most recently, Quad OPMS was updated on October 16, 2026 and DOCFIX on October 13, 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.*