# Sigma Notepad Calculator vs NoteCalcu

The clearest difference is in-app purchases: NoteCalcu at none against Sigma Notepad Calculator's 3. NoteCalcu also leads on iOS requirement (12.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Sigma Notepad Calculator sells 3 in-app purchases, starting at $1.99 per month. NoteCalcu asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Sigma Notepad Calculator | NoteCalcu |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Size | 16 MB | 2 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Soules Studio Ltd](https://appshunter.io/developer/1883253392) | [献亭 刘](https://appshunter.io/developer/1670077904) |

## What reviewers say

### Sigma Notepad Calculator

[App page](https://appshunter.io/ios/app/sigma-notepad-calculator/id6768903761)

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Annual | $14.99 | per year |
| Lifetime | $29.99 | one-time |


### NoteCalcu

[App page](https://appshunter.io/ios/app/notecalcu-note-calculator/id6775677597)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sigma Notepad Calculator free?

Sigma Notepad Calculator is free to download, with in-app purchases available.

### Is NoteCalcu free?

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

### Do Sigma Notepad Calculator or NoteCalcu have ads?

Neither Sigma Notepad Calculator nor NoteCalcu shows ads.

### Which is updated more often, Sigma Notepad Calculator or NoteCalcu?

Sigma Notepad Calculator ships an update fortnightly, and NoteCalcu fortnightly. Most recently, Sigma Notepad Calculator was updated on October 25, 2026 and NoteCalcu on October 7, 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.*