# Sigma Notepad Calculator vs Numerus

The clearest difference is in-app purchases: Numerus at none against Sigma Notepad Calculator's 3. On price, ads, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | Sigma Notepad Calculator | Numerus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | — |
| Size | 15 MB | 34 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Soules Studio Ltd](https://appshunter.io/developer/1883253392) | [Viento Digital](https://appshunter.io/developer/768009504) |

## 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 |


### Numerus

[App page](https://appshunter.io/ios/app/numerus-calculation-notebook/id6798961056)

**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 Numerus free?

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

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

Neither Sigma Notepad Calculator nor Numerus shows ads.

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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.*