# PDF Cropper vs Hydrostatic Pressure Calc

The clearest difference is rating: Hydrostatic Pressure Calc at 5.0 against PDF Cropper's 3.1. PDF Cropper's advantage is update cadence (every 2 months vs every 31 months) and ratings volume (18 vs 1). On ads, in-app purchases, monetization model and device support there is nothing between them.

PDF Cropper costs $1.99 and Hydrostatic Pressure Calc $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hydrostatic Pressure Calc holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: PDF Cropper has 18 ratings behind it against 1, so its average is the more settled of the two.

PDF Cropper ships an update every 2 months, Hydrostatic Pressure Calc every 31 months. The most recent releases landed on September 19, 2026 and June 25, 2026 respectively.

## The numbers

| Metric | PDF Cropper | Hydrostatic Pressure Calc |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | [3.1 (18 ratings)](https://appshunter.io/ios/app/pdf-cropper/id721151706/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydrostatic-pressure-calc/id1420384357/reviews)** |
| Number of ratings | **18** | 1 |
| Positive reviews | 40.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 31 months |
| Monetization | Paid | Paid |
| Size | 26 MB | 1 MB |
| Requires iOS | 13.5 | **13** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [实 许](https://appshunter.io/developer/681075194) | [Tan Chia Ling](https://appshunter.io/developer/321121189) |

## What reviewers say

### PDF Cropper

[App page](https://appshunter.io/ios/app/pdf-cropper/id721151706)

Easily crop the edges of PDF files with this utility app. Import, crop using preset or custom modes, and export your modified documents. Supports iPhone, iPad, and macOS with a one-time purchase.

**Highlights:** Crop PDF edges, Preset crop modes for devices, Custom crop mode, Parity page symmetry, Single page cropping, Drag & drop import/export

**Features:** Vision Pro support

**In-app purchases:** none


### Hydrostatic Pressure Calc

[App page](https://appshunter.io/ios/app/hydrostatic-pressure-calc/id1420384357)

Quickly calculate hydrostatic pressure at any depth with this physics tool. It offers instant results, supports various units, and displays the relevant formulas for reference. Optimized for ease of use and accuracy.

**Highlights:** Instant hydrostatic pressure calculation, Supports multiple input units, Includes hydrostatic pressure formulas, Results are copyable, High precision up to 16 decimal places, Lightweight and optimized

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF Cropper free?

PDF Cropper costs $1.99, with no in-app purchases.

### Is Hydrostatic Pressure Calc free?

Hydrostatic Pressure Calc costs $2.99, with no in-app purchases.

### Which has better reviews, PDF Cropper or Hydrostatic Pressure Calc?

Hydrostatic Pressure Calc is rated higher. PDF Cropper averages 3.1 out of 5 from 18 ratings, while Hydrostatic Pressure Calc averages 5.0 from 1 ratings.

### Do PDF Cropper or Hydrostatic Pressure Calc have ads?

Neither PDF Cropper nor Hydrostatic Pressure Calc shows ads.

### Which is updated more often, PDF Cropper or Hydrostatic Pressure Calc?

PDF Cropper ships an update every 2 months, and Hydrostatic Pressure Calc every 31 months. Most recently, PDF Cropper was updated on September 19, 2026 and Hydrostatic Pressure Calc on June 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.*