# Omega Calculator vs Calculator ⁺⁻

The clearest difference is in-app purchases: Calculator ⁺⁻ at none against Omega Calculator's 1. Omega Calculator's advantage is ads (none vs shown) and review sentiment (83% vs 50%). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Omega Calculator sells 1 one-off in-app purchase. Calculator ⁺⁻ asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Omega Calculator against 4.7 for Calculator ⁺⁻. Both are backed by a comparable volume of ratings — 44 and 42 respectively. Written reviews are what separate them: 83% of Omega Calculator's written reviews are positive against 50% of Calculator ⁺⁻'s.

Omega Calculator ships an update every 2 months, Calculator ⁺⁻ every 15 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Omega Calculator | Calculator ⁺⁻ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (44 ratings)](https://appshunter.io/ios/app/omega-calculator/id1528068503/reviews)** | [4.7 (42 ratings)](https://appshunter.io/ios/app/calculator/id6443813573/reviews) |
| Number of ratings | **44** | 42 |
| Positive reviews | **83.3% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 15 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 9 MB | 4 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Joseph Rupertus](https://appshunter.io/developer/1610637143) | [Matrix Software Co.](https://appshunter.io/developer/1457004046) |

## What reviewers say

### Omega Calculator

[App page](https://appshunter.io/ios/app/omega-calculator/id1528068503)

A beautiful and intuitive calculator app for iPhone and iPad, offering both basic arithmetic and advanced scientific functions. It features a smooth, fluid interface with large, colorful buttons and high-quality mathematical typesetting. Results are saved to a history tape and synced across devices, with customizable themes available.

**Highlights:** Basic and scientific calculation modes, Intuitive and fluid interface, High-quality mathematical typesetting, History tape for saved calculations, Customizable themes, Advanced functions (Pro version)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Omega Pro | $6.99 | one-time |


### Calculator ⁺⁻

[App page](https://appshunter.io/ios/app/calculator/id6443813573)

This app offers both basic and scientific calculation functions for iPhone and iPad. Users can customize its appearance, view calculation history, and perform complex equations with high accuracy. It also provides real-time calculation display and adjustable touch feedback.

**Highlights:** Basic and scientific calculator modes, Over 30 scientific operations, Calculation history view, Real-time calculation display, Customizable color themes, Adjustable button touch sound/vibration, High accuracy calculations (75+ significant digits)

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

**In-app purchases:** none


## Frequently asked questions

### Is Omega Calculator free?

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

### Is Calculator ⁺⁻ free?

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

### Which has better reviews, Omega Calculator or Calculator ⁺⁻?

Omega Calculator is rated higher. Omega Calculator averages 4.7 out of 5 from 44 ratings, while Calculator ⁺⁻ averages 4.7 from 42 ratings.

### Do Omega Calculator or Calculator ⁺⁻ have ads?

Calculator ⁺⁻ shows ads; Omega Calculator does not.

### Which is updated more often, Omega Calculator or Calculator ⁺⁻?

Omega Calculator ships an update every 2 months, and Calculator ⁺⁻ every 15 months. Most recently, Omega Calculator was updated on October 24, 2026 and Calculator ⁺⁻ on October 24, 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.*