# Sigma Notepad Calculator vs Notepad Calculator

The clearest difference is update cadence: Notepad Calculator at every 2 days against Sigma Notepad Calculator's fortnightly. On price, ads, in-app purchases 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 and Notepad Calculator sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Sigma Notepad Calculator ships an update fortnightly, Notepad Calculator every 2 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Sigma Notepad Calculator | Notepad Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 16 MB | 62 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Soules Studio Ltd](https://appshunter.io/developer/1883253392) | [Preet Jariwala](https://appshunter.io/developer/6793531856) |

## 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 |


### Notepad Calculator

[App page](https://appshunter.io/ios/app/notepad-calculator-calcen/id6793531853)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalcEn Weekly-Pro | $3.99 | per 7 days |
| Yearly Pro | $14.99 | per year |
| CalcEn Lifetime-Pro | $34.99 | one-time |


## Frequently asked questions

### Is Sigma Notepad Calculator free?

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

### Is Notepad Calculator free?

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

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

Neither Sigma Notepad Calculator nor Notepad Calculator shows ads.

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

Sigma Notepad Calculator ships an update fortnightly, and Notepad Calculator every 2 days. Most recently, Sigma Notepad Calculator was updated on October 25, 2026 and Notepad Calculator on October 25, 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.*