# NoteApp, Mindmap, PDF vs Cairn

The clearest difference is iOS requirement: NoteApp, Mindmap, PDF at 17.6 against Cairn's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. NoteApp, Mindmap, PDF sells 12 in-app purchases, starting at $2.99 per month and Cairn sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | NoteApp, Mindmap, PDF | Cairn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (7 ratings)](https://appshunter.io/ios/app/noteapp-mindmap-pdf-inknode/id6762065103/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Freemium | — |
| Size | 133 MB | 35 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 9+ | 4+ |
| Developer | [Jiakai Wei](https://appshunter.io/developer/1868257230) | [Pham Van Hai](https://appshunter.io/developer/6805783484) |

## What reviewers say

### NoteApp, Mindmap, PDF

[App page](https://appshunter.io/ios/app/noteapp-mindmap-pdf-inknode/id6762065103)

This app combines handwriting, structured templates, and PDF editing for note-taking and collaboration. It offers AI assistance for summaries and quizzes, with local and cloud-based features. Ideal for students and teams who prefer a pen-first approach.

**Highlights:** Handwriting and sketching, Structured templates, PDF import and editing, Real-time collaboration, AI-powered chat, summaries, and quizzes, Local and cloud sync, Reminders and calendars

**Features:** macOS Compatibility

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly Subscription | $2.99 | per month |
| Premium Yearly Offer | $5.99 | per year |
| InkNode Pro Monthly Subscription | $6.99 | per month |
| InkNode Premium Yearly Subscription | $14.99 | per year |
| Premium Yearly Offer 2 | $14.99 | per year |
| InkNode Ultra Monthly Subscription | $19.99 | per month |
| InkNode Pro Yearly Subscription | $25.99 | per year |
| InkNode Ultra Yearly Subscription | $79.99 | per year |
| Premium Lifetime Offer | $23.99 | one-time |
| InkNode Lifetime Premium | $39.99 | one-time |
| InkNode Pro Lifetime | $59.99 | one-time |
| InkNode Ultra Lifetime | $99.99 | one-time |


### Cairn

[App page](https://appshunter.io/ios/app/cairn-focus-and-study-timer/id6811870112)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cairn Pro · Lifetime Unlock | $1.99 | one-time |


## Frequently asked questions

### Is NoteApp, Mindmap, PDF free?

NoteApp, Mindmap, PDF is free to download, with in-app purchases available.

### Is Cairn free?

Cairn is free to download, with in-app purchases available.

### Do NoteApp, Mindmap, PDF or Cairn have ads?

Neither NoteApp, Mindmap, PDF nor Cairn shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*