# Calculator² vs Plusm

The clearest difference is iOS requirement: Calculator² at 9.0 against Plusm's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Calculator² sells 3 one-off in-app purchases and Plusm sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Calculator² ships an update every 3 months, Plusm every 5 months. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Calculator² | Plusm |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 78 MB | 4 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Richard Walters](https://appshunter.io/developer/1137474748) | [Egor Sigaev](https://appshunter.io/developer/1885576306) |

## What reviewers say

### Calculator²

[App page](https://appshunter.io/ios/app/calculator/id1137474749)

This app offers a suite of specialized calculators, including scientific, financial, programmer, and basic functions. It also features a currency converter and a comprehensive unit converter for various needs.

**Highlights:** Scientific calculator with advanced functions, Financial calculator for loan and tax calculations, Programmer calculator for number base conversions, Currency converter with real-time rates, Unit converter for over 200 units, Basic calculator for everyday use

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Financial Calculator | $0.99 | one-time |
| Currency Converter | $0.99 | one-time |
| Calculator² Premium | $1.99 | one-time |


### 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 |


## Frequently asked questions

### Is Calculator² free?

Calculator² is free to download, with in-app purchases available.

### Is Plusm free?

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

### Do Calculator² or Plusm have ads?

Neither Calculator² nor Plusm shows ads.

### Which is updated more often, Calculator² or Plusm?

Calculator² ships an update every 3 months, and Plusm every 5 months. Most recently, Calculator² was updated on October 16, 2026 and Plusm on October 13, 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.*