# Calculator⁻ vs Drastic Calc

The clearest difference is update cadence: Drastic Calc at weekly against Calculator⁻'s every 2 months. Calculator⁻'s advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calculator⁻ ships an update every 2 months, Drastic Calc weekly. The most recent releases landed on October 18, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Calculator⁻ | Drastic Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (3.6K ratings)](https://appshunter.io/ios/app/calculator/id1327796464/reviews)** | — |
| Number of ratings | **3.6K** | — |
| Positive reviews | 52.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 4 MB | 15 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [UniCom Technology](https://appshunter.io/developer/1270764210) | [Tatsuro Furuya](https://appshunter.io/developer/1865297357) |

## What reviewers say

### Calculator⁻

[App page](https://appshunter.io/ios/app/calculator/id1327796464)

A straightforward calculator app designed for simplicity, offering basic arithmetic operations and percentage calculations. It allows users to record and recall past results, customize colors, and enable touch sounds for a personalized experience.

**Highlights:** Basic arithmetic operations, Percentage calculations, Record and recall results, Customizable colors, Touch sound option

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Efficient calculations
- 💡 Retro design
- 👍 Simple and straightforward

**What reviewers complain about**

- 🐛 Decimal point issues
- 🐛 Incorrect calculations
- 🐛 Broken buttons
- 🔍 Confusing button layout

**Reported bugs**

- Decimal point problem: .5 becomes 5
- Button that should be 7 shows as 9 and gives 9 when used
- Percentage button does not work correctly

**Requested features**

- Backspace button
- Percentage button that works properly
- Arrange buttons in standard calculator layout


### Drastic Calc

[App page](https://appshunter.io/ios/app/drastic-calc/id6757259289)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculator⁻ free?

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

### Is Drastic Calc free?

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

### Do Calculator⁻ or Drastic Calc have ads?

Both Calculator⁻ and Drastic Calc show ads.

### Which is updated more often, Calculator⁻ or Drastic Calc?

Calculator⁻ ships an update every 2 months, and Drastic Calc weekly. Most recently, Calculator⁻ was updated on October 18, 2026 and Drastic Calc on October 1, 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.*