# O'Reilly Pro vs ATRA Pro

The clearest difference is chart position: O'Reilly Pro at #83 against ATRA Pro's unranked. 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.

O'Reilly Pro ships an update every 4 weeks, ATRA Pro every 3 weeks. The most recent releases landed on September 25, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | O'Reilly Pro | ATRA Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (375 ratings)](https://appshunter.io/ios/app/oreilly-pro/id6467030803/reviews)** | — |
| Number of ratings | **375** | — |
| Positive reviews | 61.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Best chart rank | **#83** | — |
| Size | 53 MB | 43 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [O'Reilly Auto Parts](https://appshunter.io/developer/867284451) | [Automatic Transmission Rebuilders Association](https://appshunter.io/developer/1828459736) |

## What reviewers say

### O'Reilly Pro

[App page](https://appshunter.io/ios/app/oreilly-pro/id6467030803)

**Currently charting:** #83 Top Free · Business (US App Store)

Streamline vehicle service and parts management with this app designed for automotive repair professionals. Features include VIN scanning, parts lookup, ordering, and customer quoting. Supports English and Spanish.

**Highlights:** VIN scanner and license plate decoder, Parts lookup and ordering, Real-time inventory access, Part number interchange, Order placement and tracking, Customer quoting via text/email, Bilingual support (English/Spanish)

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and quick
- 👍 Smooth and quick research
- 👍 Keeps cars rotating off lifts
- 👍 Simple to use, parts categorized
- 👍 Wonderful app, made job easier

**What reviewers complain about**

- 🔒 Cannot use without making an account, no guest mode
- ⚠️ Invoices on web and app do not include tax, inconvenient

**Reported bugs**

- Cannot get into app past login screen after 8 pm

**Requested features**

- Vehicle data/spec like Google
- Print invoices with tax


### ATRA Pro

[App page](https://appshunter.io/ios/app/atra-pro/id6749012675)

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

**In-app purchases:** none


## Frequently asked questions

### Is O'Reilly Pro free?

O'Reilly Pro is free to download, with no in-app purchases.

### Is ATRA Pro free?

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

### Do O'Reilly Pro or ATRA Pro have ads?

Neither O'Reilly Pro nor ATRA Pro shows ads.

### Which is updated more often, O'Reilly Pro or ATRA Pro?

O'Reilly Pro ships an update every 4 weeks, and ATRA Pro every 3 weeks. Most recently, O'Reilly Pro was updated on September 25, 2026 and ATRA Pro on September 8, 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.*