# Unit Conversion vs FlexCalc

The clearest difference is price: FlexCalc at Free against Unit Conversion's $0.99. FlexCalc also leads on rating (5.0 vs 4.6) and update cadence (every 3 weeks vs every 3 months). Unit Conversion's advantage is in-app purchases (none vs 1) and ratings volume (103 vs 1). On ads and device support there is nothing between them.

FlexCalc is free to download; Unit Conversion costs $0.99 up front. FlexCalc sells 1 one-off in-app purchase. Unit Conversion asks for nothing beyond the download.

FlexCalc holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Unit Conversion has 103 ratings behind it against 1, so its average is the more settled of the two.

Unit Conversion ships an update every 3 months, FlexCalc every 3 weeks. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Unit Conversion | FlexCalc |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.6 (103 ratings)](https://appshunter.io/ios/app/unit-conversion-converter-and-calculator/id336359986/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flexcalc-flexible-calculator/id6785043241/reviews)** |
| Number of ratings | **103** | 1 |
| Positive reviews | 73.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 21 MB |
| Requires iOS | **6.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fapps World et Cie S.E.C.S.](https://appshunter.io/developer/881437066) | [Tho Tran](https://appshunter.io/developer/1110817755) |

## What reviewers say

### Unit Conversion

[App page](https://appshunter.io/ios/app/unit-conversion-converter-and-calculator/id336359986)

Easily convert between various units with this app, featuring 16 categories like temperature, currency, and distance. It also includes standard and scientific calculators, eliminating the need to switch between apps. Frequently used units are prioritized for quick access.

**Highlights:** 16 unit categories, Standard and scientific calculators, Units sorted by frequency of use, Programmable buttons for favorites, Live currency conversion rates, Intuitive user interface

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

**In-app purchases:** none


### FlexCalc

[App page](https://appshunter.io/ios/app/flexcalc-flexible-calculator/id6785043241)

This utility app allows users to create and edit calculations with linked values that update instantly. It offers a history feature to review past work and supports sharing calculations. Users can also customize themes and fonts for a personalized experience.

**Highlights:** Editable calculations, Linked values update automatically, Reuse results in new calculations, Calculation history, Share calculations, Customizable themes and fonts, Scientific functions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy a Coffee | $1.99 | one-time |


## Frequently asked questions

### Is Unit Conversion free?

Unit Conversion costs $0.99, with no in-app purchases.

### Is FlexCalc free?

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

### Which has better reviews, Unit Conversion or FlexCalc?

FlexCalc is rated higher. Unit Conversion averages 4.6 out of 5 from 103 ratings, while FlexCalc averages 5.0 from 1 ratings.

### Do Unit Conversion or FlexCalc have ads?

Neither Unit Conversion nor FlexCalc shows ads.

### Which is updated more often, Unit Conversion or FlexCalc?

Unit Conversion ships an update every 3 months, and FlexCalc every 3 weeks. Most recently, Unit Conversion was updated on November 6, 2026 and FlexCalc on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*