# Arrette Scale sketch drafting vs CalibratedNotes

The clearest difference is price: CalibratedNotes at Free against Arrette Scale sketch drafting's $8.99. CalibratedNotes also leads on update cadence (every 2 days vs every 3 months) and device support (3 vs 1). Arrette Scale sketch drafting's advantage is in-app purchases (none vs 1) and iOS requirement (12.4 vs 15.0). On ads there is nothing between them.

CalibratedNotes is free to download; Arrette Scale sketch drafting costs $8.99 up front. CalibratedNotes sells 1 in-app purchase, starting at $2.99 per month. Arrette Scale sketch drafting asks for nothing beyond the download.

Arrette Scale sketch drafting ships an update every 3 months, CalibratedNotes every 2 days. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Arrette Scale sketch drafting | CalibratedNotes |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[2.6 (14 ratings)](https://appshunter.io/ios/app/arrette-scale-sketch-drafting/id730151020/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 53 MB | 50 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Arrette, Inc.](https://appshunter.io/developer/730151023) | [AIDEN JASON SEXTON](https://appshunter.io/developer/6790957568) |

## What reviewers say

### Arrette Scale sketch drafting

[App page](https://appshunter.io/ios/app/arrette-scale-sketch-drafting/id730151020)

This app allows designers to sketch freehand while maintaining precise scale, similar to vector drafting tools. It offers intuitive drawing tools and features for easy sharing and collaboration, simplifying the design process for professionals.

**Highlights:** Freehand drawing pens with vector scaling, Adjustable grid system (metric/decimal feet), Straight edge and circle edge tools, Distance and area measurement tools, Lasso tool for selection and manipulation, Layer support for organized designs, Easy sharing via email or saving to device

**In-app purchases:** none


### CalibratedNotes

[App page](https://appshunter.io/ios/app/calibratednotes/id6790957566)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalibratedNotes Premium | $2.99 | per month |


## Frequently asked questions

### Is Arrette Scale sketch drafting free?

Arrette Scale sketch drafting costs $8.99, with no in-app purchases.

### Is CalibratedNotes free?

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

### Do Arrette Scale sketch drafting or CalibratedNotes have ads?

Neither Arrette Scale sketch drafting nor CalibratedNotes shows ads.

### Which is updated more often, Arrette Scale sketch drafting or CalibratedNotes?

Arrette Scale sketch drafting ships an update every 3 months, and CalibratedNotes every 2 days. Most recently, Arrette Scale sketch drafting was updated on October 29, 2026 and CalibratedNotes on October 24, 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.*