# O'Reilly vs 1Z0

The clearest difference is update cadence: O'Reilly at fortnightly against 1Z0's every 2 months. 1Z0's advantage is iOS requirement (15.0 vs 18.5). On price, ads, in-app purchases and device support 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 ships an update fortnightly, 1Z0 every 2 months. The most recent releases landed on October 20, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | O'Reilly | 1Z0 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (34K ratings)](https://appshunter.io/ios/app/oreilly/id881697395/reviews)** | — |
| Number of ratings | **34K** | — |
| Positive reviews | 46.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Subscription | — |
| Size | 64 MB | 30 MB |
| Requires iOS | 18.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [O'Reilly Media, Inc.](https://appshunter.io/developer/312570215) | [Davy Raitt](https://appshunter.io/developer/1795318281) |

## What reviewers say

### O'Reilly

[App page](https://appshunter.io/ios/app/oreilly/id881697395)

Access a vast library of expert-led books, videos, and courses on business and technology trends. Learn online or offline, sync progress across devices, and personalize your reading experience. Discover and organize content with playlists for easy access.

**Highlights:** Offline access to books, videos, and courses, Cross-device progress syncing, Content discovery and playlist creation, Personalized text display and night mode, Search across all learning materials, External keyboard support

**Features:** iMessage stickers, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Great resource for learning
- 👍 Excellent content and library
- 💡 Helpful features like playlists
- 🚀 Offline reading and downloads

**What reviewers complain about**

- 🐛 Buggy app with crashes and issues
- 👎 Poor reading experience and navigation
- 🔒 Frequent login issues
- 👎 Inconsistent sync across devices

**Reported bugs**

- Frequent crashes and freezes
- Unreliable downloads and offline access
- Login issues and loss of progress
- Inconsistent behavior across updates

**Requested features**

- Improved bookmarking and note-taking
- Customizable text formatting and layout
- Better search and content discovery
- Seamless sync across devices


### 1Z0

[App page](https://appshunter.io/ios/app/1z0-829-java-se-17-exam-prep/id6789257017)

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

**In-app purchases:** none


## Frequently asked questions

### Is O'Reilly free?

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

### Is 1Z0 free?

1Z0 is free to download, with no in-app purchases.

### Do O'Reilly or 1Z0 have ads?

Neither O'Reilly nor 1Z0 shows ads.

### Which is updated more often, O'Reilly or 1Z0?

O'Reilly ships an update fortnightly, and 1Z0 every 2 months. Most recently, O'Reilly was updated on October 20, 2026 and 1Z0 on October 2, 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.*