# Calculator° HD vs HelixNotes

The clearest difference is update cadence: HelixNotes at every 3 weeks against Calculator° HD's every 74 months. HelixNotes also leads on device support (3 vs 1). Calculator° HD's advantage is iOS requirement (9.0 vs 14.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Calculator° HD against 5.0 for HelixNotes. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Calculator° HD ships an update every 74 months, HelixNotes every 3 weeks. The most recent releases landed on September 10, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | Calculator° HD | HelixNotes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/calculator-hd/id590208623/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/helixnotes/id6788490726/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 74 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 20 MB | 18 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [宗明 杨](https://appshunter.io/developer/854194764) | [Yuri Karamian](https://appshunter.io/developer/6788490728) |

## What reviewers say

### Calculator° HD

[App page](https://appshunter.io/ios/app/calculator-hd/id590208623)

This utility app offers a user-friendly and aesthetically pleasing calculator experience specifically designed for iPads. It supports handwriting input and includes a range of scientific functions for complex calculations.

**Highlights:** Handwriting support, Scientific functions, iPad optimized design, User-friendly interface, Aesthetic design

**In-app purchases:** none


### HelixNotes

[App page](https://appshunter.io/ios/app/helixnotes/id6788490726)

A private, open-source Markdown note-taking app that keeps your data on your device. Organize notes with notebooks, tags, and wiki links, and utilize advanced features like mathematical notation and diagrams.

**Highlights:** Local Markdown storage, Visual and source code editor, Notebooks, tags, and wiki links, Task management and calendar views, KaTeX and Mermaid diagram support, Version history and backups, Optional WebDAV sync

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculator° HD free?

Calculator° HD is free to download, with no in-app purchases.

### Is HelixNotes free?

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

### Which has better reviews, Calculator° HD or HelixNotes?

Calculator° HD and HelixNotes are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do Calculator° HD or HelixNotes have ads?

Neither Calculator° HD nor HelixNotes shows ads.

### Which is updated more often, Calculator° HD or HelixNotes?

Calculator° HD ships an update every 74 months, and HelixNotes every 3 weeks. Most recently, Calculator° HD was updated on September 10, 2026 and HelixNotes on September 4, 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.*