# Basic Calculator Pro vs Obelus Calculator

The clearest difference is price: Obelus Calculator at Free against Basic Calculator Pro's $1.99. Obelus Calculator also leads on update cadence (weekly vs every 3 months). Basic Calculator Pro's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On ads and in-app purchases there is nothing between them.

Obelus Calculator is free to download; Basic Calculator Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Basic Calculator Pro ships an update every 3 months, Obelus Calculator weekly. The most recent releases landed on October 2, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Basic Calculator Pro | Obelus Calculator |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.8 (699 ratings)](https://appshunter.io/ios/app/basic-calculator-pro/id821421514/reviews)** | — |
| Number of ratings | **699** | — |
| Positive reviews | 89.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free | — |
| Size | 23 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SuperDG Inc.](https://appshunter.io/developer/635709768) | [Chris Wang](https://appshunter.io/developer/1723706836) |

## What reviewers say

### Basic Calculator Pro

[App page](https://appshunter.io/ios/app/basic-calculator-pro/id821421514)

This app provides a straightforward calculation system, focusing on essential functions without complex engineering features. It offers a clean design, calculation history, and displays current modifications for ease of use.

**Highlights:** Basic calculation system, Calculation history, Intuitive design, Shows present modifications, No ads

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

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 📚 Keeps a history of calculations
- 🚀 Fast and efficient
- 💻 Works well across devices
- 🧠 Intuitive interface

**What reviewers complain about**

- 🙄 Frequent review prompts interrupting usage
- 👀 Low contrast/visibility of numbers
- 🔒 Questionable Bluetooth permission request

**Reported bugs**

- Numpad enter key not working on Mac
- Screen moving up/down when typing one-handed on iPhone

**Requested features**

- Dark mode option
- Ability to edit past calculations
- Split-screen support on iPad
- Customizable button colors


### Obelus Calculator

[App page](https://appshunter.io/ios/app/obelus-calculator/id6475239824)

**In-app purchases:** none


## Frequently asked questions

### Is Basic Calculator Pro free?

Basic Calculator Pro costs $1.99, with no in-app purchases.

### Is Obelus Calculator free?

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

### Do Basic Calculator Pro or Obelus Calculator have ads?

Neither Basic Calculator Pro nor Obelus Calculator shows ads.

### Which is updated more often, Basic Calculator Pro or Obelus Calculator?

Basic Calculator Pro ships an update every 3 months, and Obelus Calculator weekly. Most recently, Basic Calculator Pro was updated on October 2, 2026 and Obelus Calculator on September 10, 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.*