# Odilo@u vs J

The clearest difference is update cadence: Odilo@u at fortnightly against J's every 2 months. J's advantage is iOS requirement (13.4 vs 16.0). 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.

Odilo@u ships an update fortnightly, J every 2 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Odilo@u | J |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | — |
| Size | 71 MB | 25 MB |
| Requires iOS | 16.0 | **13.4** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Odilo](https://appshunter.io/developer/976580041) | [Informatics Publishing Limited](https://appshunter.io/developer/1490108702) |

## What reviewers say

### Odilo@u

[App page](https://appshunter.io/ios/app/odilou-pustaka/id1545885564)

Access thousands of free books from the u-Pustaka Digital Library anytime, anywhere. This intuitive application allows users to discover and borrow titles directly from their smart devices. Registration and login are all that's needed to start reading.

**Highlights:** Discover free books, Borrow titles digitally, Access from multiple devices, Intuitive user interface, Register and login, Read anytime, anywhere

**In-app purchases:** none


### J

[App page](https://appshunter.io/ios/app/j-gate/id1670549103)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Odilo@u free?

Odilo@u is free to download, with no in-app purchases.

### Is J free?

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

### Do Odilo@u or J have ads?

Neither Odilo@u nor J shows ads.

### Which is updated more often, Odilo@u or J?

Odilo@u ships an update fortnightly, and J every 2 months. Most recently, Odilo@u was updated on October 24, 2026 and J on October 22, 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.*