# Notes Notepad Notebook vs DiagramFlow Studio

The clearest difference is ads: DiagramFlow Studio at none against Notes Notepad Notebook's shown. DiagramFlow Studio also leads on update cadence (every 5 weeks vs every 4 months). Notes Notepad Notebook's advantage is iOS requirement (13.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Notes Notepad Notebook sells 2 in-app purchases, starting at $1.99 per month and DiagramFlow Studio sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Notes Notepad Notebook ships an update every 4 months, DiagramFlow Studio every 5 weeks. The most recent releases landed on September 11, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Notes Notepad Notebook | DiagramFlow Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Size | 31 MB | 5 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [JanoGroup LLC](https://appshunter.io/developer/1781461557) | [Yu Shiung Jiang](https://appshunter.io/developer/612234939) |

## What reviewers say

### Notes Notepad Notebook

[App page](https://appshunter.io/ios/app/notes-notepad-notebook/id6745029072)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly - Premium | $1.99 | per month |
| Annual - Premium | $14.99 | per year |


### DiagramFlow Studio

[App page](https://appshunter.io/ios/app/diagramflow-studio/id6780979641)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 圖流 DiagramFlow Studio Pro 解鎖 | $2.99 | one-time |


## Frequently asked questions

### Is Notes Notepad Notebook free?

Notes Notepad Notebook is free to download, with in-app purchases available.

### Is DiagramFlow Studio free?

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

### Do Notes Notepad Notebook or DiagramFlow Studio have ads?

Notes Notepad Notebook shows ads; DiagramFlow Studio does not.

### Which is updated more often, Notes Notepad Notebook or DiagramFlow Studio?

Notes Notepad Notebook ships an update every 4 months, and DiagramFlow Studio every 5 weeks. Most recently, Notes Notepad Notebook was updated on September 11, 2026 and DiagramFlow Studio on September 14, 2026.

---

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