# OmniCalc vs Unit Converter

The clearest difference is in-app purchases: OmniCalc at none against Unit Converter's 1. OmniCalc also leads on ads (none vs shown) and device support (3 vs 1). Unit Converter's advantage is update cadence (weekly vs every 2 months) and review sentiment (100% vs 72%). On price and ratings volume there is nothing between them.

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

Unit Converter holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 90 and 42 respectively. Written reviews point the same way: 72% of OmniCalc's written reviews are positive against 100% of Unit Converter's.

OmniCalc ships an update every 2 months, Unit Converter weekly. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OmniCalc | Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (90 ratings)](https://appshunter.io/ios/app/omnicalc/id363882488/reviews) | **[5.0 (42 ratings)](https://appshunter.io/ios/app/unit-converter-omniconvert/id1602930764/reviews)** |
| Number of ratings | **90** | 42 |
| Positive reviews | 71.9% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 35 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jellyfilled Studios](https://appshunter.io/developer/305571437) | [Jonathan Chen](https://appshunter.io/developer/1602930766) |

## 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


### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-omniconvert/id1602930764)

This app provides a comprehensive suite of tools for unit and currency conversions, along with various calculators and scientific constants. It offers real-time exchange rates, works offline, and supports a wide range of categories. Enjoy a user-friendly experience with features like dark mode and no conversion limits.

**Highlights:** Unit conversions, Currency conversions, Real-time exchange rates, Offline functionality, Variety of calculators, Scientific constants, Dark mode

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OmniConvert Pro | $2.99 | one-time |


## Frequently asked questions

### Is OmniCalc free?

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

### Is Unit Converter free?

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

### Which has better reviews, OmniCalc or Unit Converter?

Unit Converter is rated higher. OmniCalc averages 4.6 out of 5 from 90 ratings, while Unit Converter averages 5.0 from 42 ratings.

### Do OmniCalc or Unit Converter have ads?

Unit Converter shows ads; OmniCalc does not.

### Which is updated more often, OmniCalc or Unit Converter?

OmniCalc ships an update every 2 months, and Unit Converter weekly. Most recently, OmniCalc was updated on October 20, 2026 and Unit Converter 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.*