# LaboratoryMonitoring vs Simple PDF

The clearest difference is iOS requirement: LaboratoryMonitoring at 9.0 against Simple PDF's 16.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

LaboratoryMonitoring ships an update monthly, Simple PDF every 3 weeks. The most recent releases landed on September 17, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | LaboratoryMonitoring | Simple PDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/simple-pdf-pdf-reader/id6746363157/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 28 MB | 12 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Wuhan Huchuang Technology Co., Ltd.](https://appshunter.io/developer/1221193605) | [Chang Keun Jung](https://appshunter.io/developer/1813307401) |

## What reviewers say

### LaboratoryMonitoring

[App page](https://appshunter.io/ios/app/laboratorymonitoring/id6447594996)

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple PDF

[App page](https://appshunter.io/ios/app/simple-pdf-pdf-reader/id6746363157)

This application allows users to view, annotate, and edit PDF documents with ease. Features include document management, OCR capabilities, and a built-in scanner. It's designed for students and professionals to stay productive on the go.

**Highlights:** View, annotate, and edit PDFs, Full-text search and navigation, Free-draw and text box annotation, Page reordering and PDF merging, Scan documents with built-in camera, OCR for text extraction, Home screen widget for quick access

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

**In-app purchases:** none


## Frequently asked questions

### Is LaboratoryMonitoring free?

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

### Is Simple PDF free?

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

### Do LaboratoryMonitoring or Simple PDF have ads?

Neither LaboratoryMonitoring nor Simple PDF shows ads.

### Which is updated more often, LaboratoryMonitoring or Simple PDF?

LaboratoryMonitoring ships an update monthly, and Simple PDF every 3 weeks. Most recently, LaboratoryMonitoring was updated on September 17, 2026 and Simple PDF on September 19, 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.*