# Light PDF vs Shelves Book Tracker

The clearest difference is in-app purchases: Light PDF at none against Shelves Book Tracker's 2. Light PDF also leads on update cadence (every 5 days vs every 3 weeks). Shelves Book Tracker's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Shelves Book Tracker sells 2 in-app purchases, starting at $0.99 per 7 days. Light PDF asks for nothing beyond the download.

Light PDF ships an update every 5 days, Shelves Book Tracker every 3 weeks. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Light PDF | Shelves Book Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Size | 33 MB | 50 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [其达 林](https://appshunter.io/developer/1781276360) | [Francis KOUAHO](https://appshunter.io/developer/1806660718) |

## What reviewers say

### Light PDF

[App page](https://appshunter.io/ios/app/light-pdf-lite-pdf-reader/id6739862474)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shelves Book Tracker

[App page](https://appshunter.io/ios/app/shelves-book-tracker/id6760184205)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shelves Pro Hebdomadaire | $0.99 | per 7 days |
| Shelves Pro Annuel | $24.99 | per year |


## Frequently asked questions

### Is Light PDF free?

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

### Is Shelves Book Tracker free?

Shelves Book Tracker is free to download, with in-app purchases available.

### Do Light PDF or Shelves Book Tracker have ads?

Light PDF shows ads; Shelves Book Tracker does not.

### Which is updated more often, Light PDF or Shelves Book Tracker?

Light PDF ships an update every 5 days, and Shelves Book Tracker every 3 weeks. Most recently, Light PDF was updated on October 2, 2026 and Shelves Book Tracker on October 10, 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.*