# Plusm vs Sigma Notepad Calculator

The clearest difference is update cadence: Sigma Notepad Calculator at every 2 months against Plusm's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Plusm sells 3 in-app purchases, starting at $2.99 per month and Sigma Notepad Calculator sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Plusm ships an update every 5 months, Sigma Notepad Calculator every 2 months. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Plusm | Sigma Notepad Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Size | 4 MB | 15 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Egor Sigaev](https://appshunter.io/developer/1885576306) | [Soules Studio Ltd](https://appshunter.io/developer/1883253392) |

## What reviewers say

### Plusm

[App page](https://appshunter.io/ios/app/plusm-notepad-calculator/id6760660267)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plusm Pro Monthly | $2.99 | per month |
| Plusm Pro Yearly | $17.99 | per year |
| Plusm Pro Lifetime | $24.99 | one-time |


### 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 |


## Frequently asked questions

### Is Plusm free?

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

### Is Sigma Notepad Calculator free?

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

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

Neither Plusm nor Sigma Notepad Calculator shows ads.

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

Plusm ships an update every 5 months, and Sigma Notepad Calculator every 2 months. Most recently, Plusm was updated on September 10, 2026 and Sigma Notepad Calculator on September 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*