# Observer HD vs O'Reilly Pro

The clearest difference is review sentiment: O'Reilly Pro at 61% against Observer HD's 0%. O'Reilly Pro also leads on rating (4.4 vs 1.3) and ratings volume (375 vs 16). Observer HD's advantage is iOS requirement (8.0 vs 16.0). 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 holds the better App Store score, 4.4 against 1.3. That said, the two scores are not equally well evidenced: O'Reilly Pro has 375 ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 0% of Observer HD's written reviews are positive against 61% of O'Reilly Pro's.

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

## The numbers

| Metric | Observer HD | O'Reilly Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.3 (16 ratings)](https://appshunter.io/ios/app/observer-hd/id933290800/reviews) | **[4.4 (375 ratings)](https://appshunter.io/ios/app/oreilly-pro/id6467030803/reviews)** |
| Number of ratings | 16 | **375** |
| Positive reviews | 0.0% of reviews | **61.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | Free | Free |
| Best chart rank | — | **#89** |
| Size | 14 MB | 53 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [JSW PACIFIC CORPORATION](https://appshunter.io/developer/999731327) | [O'Reilly Auto Parts](https://appshunter.io/developer/867284451) |

## What reviewers say

### Observer HD

[App page](https://appshunter.io/ios/app/observer-hd/id933290800)

Monitor your properties and loved ones with this easy-to-install wireless security camera system. Access live video feeds and playback recorded events remotely via 3G or Wi-Fi from your iOS device. Enjoy peace of mind with simple setup and control.

**Highlights:** View wireless security camera system, Access via 3G or Wi-Fi, Live video streaming from iOS, Select and playback event video, Supports 3 remote viewers

**Features:** macOS Compatibility

**In-app purchases:** none


### O'Reilly Pro

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

**Currently charting:** #89 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


## Frequently asked questions

### Is Observer HD free?

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

### Is O'Reilly Pro free?

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

### Which has better reviews, Observer HD or O'Reilly Pro?

O'Reilly Pro is rated higher. Observer HD averages 1.3 out of 5 from 16 ratings, while O'Reilly Pro averages 4.4 from 375 ratings.

### Do Observer HD or O'Reilly Pro have ads?

Neither Observer HD nor O'Reilly Pro shows ads.

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

Observer HD ships an update every 3 weeks, and O'Reilly Pro every 4 weeks. Most recently, Observer HD was updated on June 3, 2026 and O'Reilly Pro on September 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.*