# PhysKey Custom vs MathNotes

The clearest difference is in-app purchases: PhysKey Custom at none against MathNotes's 1. PhysKey Custom also leads on ads (none vs shown). MathNotes's advantage is update cadence (every 2 weeks vs every 4 months) and device support (4 vs 2). On price there is nothing between them.

Both are free to download. MathNotes sells 1 one-off in-app purchase. PhysKey Custom asks for nothing beyond the download.

PhysKey Custom ships an update every 4 months, MathNotes every 2 weeks. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | PhysKey Custom | MathNotes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mathnotes-math-and-3d-graphs/id6761740403/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 340 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Ryosuke Asano](https://appshunter.io/developer/1858758761) | [Vladislav Alikov](https://appshunter.io/developer/1603123547) |

## What reviewers say

### PhysKey Custom

[App page](https://appshunter.io/ios/app/physkey-custom/id6757507136)

**In-app purchases:** none


### MathNotes

[App page](https://appshunter.io/ios/app/mathnotes-math-and-3d-graphs/id6761740403)

This app provides an infinite digital canvas for studying and visualizing mathematics. It allows users to create 2D and 3D graphs, take notes with LaTeX formatting, and convert handwritten equations into editable LaTeX using OCR. Ideal for students and professionals needing a comprehensive math workspace.

**Highlights:** Infinite digital canvas, 2D and 3D graph plotting, Formula OCR to LaTeX, LaTeX equation rendering, Interactive animated sliders, Note organization with media

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support the App and remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is PhysKey Custom free?

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

### Is MathNotes free?

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

### Do PhysKey Custom or MathNotes have ads?

MathNotes shows ads; PhysKey Custom does not.

### Which is updated more often, PhysKey Custom or MathNotes?

PhysKey Custom ships an update every 4 months, and MathNotes every 2 weeks. Most recently, PhysKey Custom was updated on September 19, 2026 and MathNotes on September 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.*