# Lectra Notes vs Pocket Experiments Science Lab

The clearest difference is in-app purchases: Lectra Notes at none against Pocket Experiments Science Lab's 1. Lectra Notes also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Pocket Experiments Science Lab sells 1 one-off in-app purchase. Lectra Notes asks for nothing beyond the download.

Lectra Notes ships an update weekly, Pocket Experiments Science Lab every 9 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Lectra Notes | Pocket Experiments Science Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/lectra-notes-pdf-annotator/id6759754531/reviews)** | — |
| Number of ratings | **9** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Free | — |
| Size | 51 MB | 12 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Noel Sason](https://appshunter.io/developer/1880486957) | [MIZOU, CO., LTD.](https://appshunter.io/developer/1542553141) |

## What reviewers say

### Lectra Notes

[App page](https://appshunter.io/ios/app/lectra-notes-pdf-annotator/id6759754531)

This app provides a private workspace for reading, annotating, and organizing PDF documents. It helps users understand dense texts faster with on-device intelligence for summaries and suggested tags. Designed for a calmer document workflow, it ensures your files remain private.

**Highlights:** Read and mark up PDFs, Highlight key passages and add notes, Organize documents with folders and tags, Generate summaries and suggested tags, Private by design with on-device intelligence, Backup and sync library

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

**In-app purchases:** none


### Pocket Experiments Science Lab

[App page](https://appshunter.io/ios/app/pocket-experiments-science-lab/id6810875310)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $29.99 | one-time |


## Frequently asked questions

### Is Lectra Notes free?

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

### Is Pocket Experiments Science Lab free?

Pocket Experiments Science Lab is free to download, with in-app purchases available.

### Do Lectra Notes or Pocket Experiments Science Lab have ads?

Pocket Experiments Science Lab shows ads; Lectra Notes does not.

### Which is updated more often, Lectra Notes or Pocket Experiments Science Lab?

Lectra Notes ships an update weekly, and Pocket Experiments Science Lab every 9 days. Most recently, Lectra Notes was updated on November 5, 2026 and Pocket Experiments Science Lab on October 31, 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.*