# Basic Unit Converter vs Conversion Calculator

The clearest difference is rating: Conversion Calculator at 4.8 against Basic Unit Converter's 4.0. Conversion Calculator also leads on ratings volume (157 vs 2). Basic Unit Converter's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 5 weeks). On price, review sentiment, ads and device support there is nothing between them.

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

Conversion Calculator holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Conversion Calculator has 157 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Basic Unit Converter ships an update every 2 weeks, Conversion Calculator every 5 weeks. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Basic Unit Converter | Conversion Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/basic-unit-converter/id1547306354/reviews) | **[4.8 (157 ratings)](https://appshunter.io/ios/app/conversion-calculator-metric/id6468678523/reviews)** |
| Number of ratings | 2 | **157** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 84 MB | 7 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Double Theory Ltd](https://appshunter.io/developer/1525279410) | [Collins Cheruiyot](https://appshunter.io/developer/1579009978) |

## What reviewers say

### Basic Unit Converter

[App page](https://appshunter.io/ios/app/basic-unit-converter/id1547306354)

Easily convert between various units of measurement across 12 categories including length, mass, temperature, and digital storage. Ideal for cooking, personal measurements, or general calculations.

**Highlights:** 12 conversion categories, Supports metric and imperial units, Instant calculation, Intuitive interface, Wide range of units

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

**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 Basic Unit Converter free?

Basic Unit Converter 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, Basic Unit Converter or Conversion Calculator?

Conversion Calculator is rated higher. Basic Unit Converter averages 4.0 out of 5 from 2 ratings, while Conversion Calculator averages 4.8 from 157 ratings.

### Do Basic Unit Converter or Conversion Calculator have ads?

Neither Basic Unit Converter nor Conversion Calculator shows ads.

### Which is updated more often, Basic Unit Converter or Conversion Calculator?

Basic Unit Converter ships an update every 2 weeks, and Conversion Calculator every 5 weeks. Most recently, Basic Unit Converter was updated on October 7, 2026 and Conversion Calculator on October 9, 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.*