# OmniCalc vs Conversion Calculator

The clearest difference is in-app purchases: OmniCalc at none against Conversion Calculator's 1. OmniCalc also leads on iOS requirement (13.0 vs 17.0). Conversion Calculator's advantage is review sentiment (100% vs 72%). On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.7 for OmniCalc against 4.8 for Conversion Calculator. Both are backed by a comparable volume of ratings — 72 and 157 respectively. Written reviews are what separate them: 72% of OmniCalc's written reviews are positive against 100% of Conversion Calculator's.

OmniCalc ships an update every 2 months, Conversion Calculator every 5 weeks. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | OmniCalc | Conversion Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (72 ratings)](https://appshunter.io/ios/app/omnicalc/id363882488/reviews) | **[4.8 (157 ratings)](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523/reviews)** |
| Number of ratings | 72 | **157** |
| Positive reviews | 71.9% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 7 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Jellyfilled Studios](https://appshunter.io/developer/305571437) | [Collins Cheruiyot](https://appshunter.io/developer/1579009978) |

## What reviewers say

### OmniCalc

[App page](https://appshunter.io/ios/app/omnicalc/id363882488)

This app offers a versatile calculator with a scrollable history for easy editing and instant results. It features date math, custom conversion calculators, and a personal math library for saving formulas and operations. Supports standard, scientific, and statistical calculations.

**Highlights:** Scrollable operation history, Instant result updates, Date math functions, Custom conversion calculators, Save formulas and history, Standard, Scientific, Statistical modes

**Features:** macOS Compatibility

**In-app purchases:** none


### Conversion Calculator

[App page](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523)

Easily convert between metric and imperial units for weight, length, temperature, area, and time. This app offers precise, fast results with a clean interface, working offline for daily, travel, school, or work needs.

**Highlights:** Metric and imperial unit conversion, Weight, length, temperature, area, time, Offline functionality, Precise and fast results, Clean and minimal interface, Over 100 measurement types

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access forever | $8.99 | one-time |


## Frequently asked questions

### Is OmniCalc free?

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

### Is Conversion Calculator free?

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

### Which has better reviews, OmniCalc or Conversion Calculator?

Conversion Calculator is rated higher. OmniCalc averages 4.7 out of 5 from 72 ratings, while Conversion Calculator averages 4.8 from 157 ratings.

### Do OmniCalc or Conversion Calculator have ads?

Neither OmniCalc nor Conversion Calculator shows ads.

### Which is updated more often, OmniCalc or Conversion Calculator?

OmniCalc ships an update every 2 months, and Conversion Calculator every 5 weeks. Most recently, OmniCalc was updated on October 16, 2026 and Conversion Calculator on October 14, 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.*