# Calibre Connector vs TrimPDF

The clearest difference is price: Calibre Connector at Free against TrimPDF's $0.99. Calibre Connector also leads on update cadence (every 4 days vs every 12 months) and iOS requirement (17.2 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Calibre Connector is free to download; TrimPDF costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calibre Connector ships an update every 4 days, TrimPDF every 12 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Calibre Connector | TrimPDF |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[2.4 (13 ratings)](https://appshunter.io/ios/app/calibre-connector/id6477761553/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 23.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 12 months |
| Monetization | Free | — |
| Size | 3 MB | 8 MB |
| Requires iOS | **17.2** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Phillip Walker](https://appshunter.io/developer/1723891603) | [SHIN INABA](https://appshunter.io/developer/800415932) |

## What reviewers say

### Calibre Connector

[App page](https://appshunter.io/ios/app/calibre-connector/id6477761553)

This application facilitates the transfer of book information from the Calibre software to your Apple device. It enables easy access to your digital library on the go.

**Highlights:** Download Calibre information, Sync to iDevice, Access digital library, Supports iPhone and iPad

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

**In-app purchases:** none


### TrimPDF

[App page](https://appshunter.io/ios/app/trimpdf-margin-crop-viewer/id6753140307)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calibre Connector free?

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

### Is TrimPDF free?

TrimPDF costs $0.99, with no in-app purchases.

### Do Calibre Connector or TrimPDF have ads?

Neither Calibre Connector nor TrimPDF shows ads.

### Which is updated more often, Calibre Connector or TrimPDF?

Calibre Connector ships an update every 4 days, and TrimPDF every 12 months. Most recently, Calibre Connector was updated on October 30, 2026 and TrimPDF on October 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.*