# OpenNotes vs Theory Checklist

The clearest difference is device support: OpenNotes at 3 against Theory Checklist's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

## The numbers

| Metric | OpenNotes | Theory Checklist |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (39 ratings)](https://appshunter.io/ios/app/opennotes-notes-and-pdf-markup/id6771224004/reviews)** | — |
| Number of ratings | **39** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Monetization | Free | — |
| Size | 45 MB | 73 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mark Miller](https://appshunter.io/developer/1836539324) | [Theory Holding SPA](https://appshunter.io/developer/1674784689) |

## What reviewers say

### OpenNotes

[App page](https://appshunter.io/ios/app/opennotes-notes-and-pdf-markup/id6771224004)

A free, open-source note-taking app designed for handwriting and PDF annotation. Organize notes into folders, import documents, and export your work. It prioritizes privacy with local-first storage and optional iCloud backups.

**Highlights:** Handwriting with Apple Pencil, PDF import and annotation, Add images and text, Folder organization, Local-first privacy, Optional iCloud backup, Export notes

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

**In-app purchases:** none


### Theory Checklist

[App page](https://appshunter.io/ios/app/theory-checklist/id6798332442)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenNotes free?

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

### Is Theory Checklist free?

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

### Do OpenNotes or Theory Checklist have ads?

Neither OpenNotes nor Theory Checklist shows ads.

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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.*