# Unit Convert Master vs Notebook

The clearest difference is in-app purchases: Unit Convert Master at none against Notebook's 2. Notebook's advantage is ads (none vs shown) and update cadence (every 10 days vs every 4 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Notebook sells 2 in-app purchases, starting at $1.99 per month. Unit Convert Master asks for nothing beyond the download.

Unit Convert Master ships an update every 4 months, Notebook every 10 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Unit Convert Master | Notebook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/unit-convert-master/id6743671551/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | Ad-supported | — |
| Size | 4 MB | 20 MB |
| Requires iOS | **18.2** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mizuki Hoshida](https://appshunter.io/developer/1797942917) | [Kerols Naguib](https://appshunter.io/developer/1828810327) |

## What reviewers say

### Unit Convert Master

[App page](https://appshunter.io/ios/app/unit-convert-master/id6743671551)

Easily convert between over 100 measurement units across 15 categories. This app offers a user-friendly interface, offline functionality, and a history of your conversions for quick access. Ideal for students, professionals, and everyday users needing precise calculations.

**Highlights:** 15+ conversion categories, 100+ measurement units, Intuitive interface with themes, Custom keyboard for input, Conversion history with search, Offline functionality

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

**In-app purchases:** none


### Notebook

[App page](https://appshunter.io/ios/app/notebook-planner-and-sketchbook/id6744011144)

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

**In-app purchases (2)**

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


## Frequently asked questions

### Is Unit Convert Master free?

Unit Convert Master is free to download, with no in-app purchases.

### Is Notebook free?

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

### Do Unit Convert Master or Notebook have ads?

Unit Convert Master shows ads; Notebook does not.

### Which is updated more often, Unit Convert Master or Notebook?

Unit Convert Master ships an update every 4 months, and Notebook every 10 days. Most recently, Unit Convert Master was updated on October 24, 2026 and Notebook on October 28, 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.*