# Universal Converter. vs ThetaCalc

Universal Converter. and ThetaCalc both sit at 4.3 stars, but that hides the real split: 100% of ThetaCalc's written reviews are positive against 0% of Universal Converter.'s. ThetaCalc also leads on price (Free vs $4.99) and update cadence (every 3 months vs every 24 months). Universal Converter.'s advantage is ratings volume (12 vs 4). On rating, ads, in-app purchases and device support there is nothing between them.

ThetaCalc is free to download; Universal Converter. costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.3 for Universal Converter. against 4.3 for ThetaCalc. Both are backed by a comparable volume of ratings — 12 and 4 respectively. Written reviews are what separate them: 0% of Universal Converter.'s written reviews are positive against 100% of ThetaCalc's.

Universal Converter. ships an update every 24 months, ThetaCalc every 3 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Universal Converter. | ThetaCalc |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.3 (12 ratings)](https://appshunter.io/ios/app/universal-converter/id519552652/reviews)** | [4.3 (4 ratings)](https://appshunter.io/ios/app/thetacalc/id1521614636/reviews) |
| Number of ratings | **12** | 4 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 5 MB | 1 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Felix Stehli](https://appshunter.io/developer/1521614638) |

## What reviewers say

### Universal Converter.

[App page](https://appshunter.io/ios/app/universal-converter/id519552652)

This utility app provides a comprehensive conversion calculator for a vast array of units across 64 categories. It offers automatic calculations based on input changes and supports regional decimal separators for ease of use.

**Highlights:** 64 conversion categories, 1333 units supported, Automatic value calculation, Supports regional decimal separators, Simple and easy to use interface, Engineering and educational utility

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

**In-app purchases:** none


### ThetaCalc

[App page](https://appshunter.io/ios/app/thetacalc/id1521614636)

This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.

**Highlights:** Reverse Polish Notation (RPN) calculator, User-programmable functions, JavaScript equation support, Extensible functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Universal Converter. free?

Universal Converter. costs $4.99, with no in-app purchases.

### Is ThetaCalc free?

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

### Which has better reviews, Universal Converter. or ThetaCalc?

Universal Converter. is rated higher. Universal Converter. averages 4.3 out of 5 from 12 ratings, while ThetaCalc averages 4.3 from 4 ratings.

### Do Universal Converter. or ThetaCalc have ads?

Neither Universal Converter. nor ThetaCalc shows ads.

### Which is updated more often, Universal Converter. or ThetaCalc?

Universal Converter. ships an update every 24 months, and ThetaCalc every 3 months. Most recently, Universal Converter. was updated on November 1, 2026 and ThetaCalc on November 3, 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.*