# ConvertCalc vs FlexCalc

The clearest difference is ads: FlexCalc at none against ConvertCalc's shown. FlexCalc also leads on iOS requirement (13.0 vs 17.0). ConvertCalc's advantage is update cadence (every 8 days vs every 3 weeks). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. ConvertCalc sells 1 one-off in-app purchase and FlexCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for ConvertCalc against 5.0 for FlexCalc. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

ConvertCalc ships an update every 8 days, FlexCalc every 3 weeks. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ConvertCalc | FlexCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/convertcalc/id6756512186/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/flexcalc-flexible-calculator/id6785043241/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 28 MB | 21 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Riehl](https://appshunter.io/developer/1861093934) | [Tho Tran](https://appshunter.io/developer/1110817755) |

## What reviewers say

### ConvertCalc

[App page](https://appshunter.io/ios/app/convertcalc/id6756512186)

This app combines a powerful calculator with an advanced unit converter, offering over 200 units across 19 categories. It allows for unified calculations and conversions in one step, with features like live currency exchange and date conversions. An optional pro version unlocks advanced customization and organizational tools.

**Highlights:** Unified calculation and conversion workflow, Over 200 units across 19 categories, Live currency conversion, Multiple calendar system conversions, Age calculator, Customizable themes and layouts, Offline functionality (excluding live currency)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ConvertCalc Pro | $8.99 | one-time |


### 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 ConvertCalc free?

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

### Is FlexCalc free?

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

### Which has better reviews, ConvertCalc or FlexCalc?

ConvertCalc and FlexCalc are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do ConvertCalc or FlexCalc have ads?

ConvertCalc shows ads; FlexCalc does not.

### Which is updated more often, ConvertCalc or FlexCalc?

ConvertCalc ships an update every 8 days, and FlexCalc every 3 weeks. Most recently, ConvertCalc was updated on October 30, 2026 and FlexCalc on November 5, 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.*