# Flex Calculators vs Twin Calc

The clearest difference is device support: Flex Calculators at 3 against Twin Calc's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

## The numbers

| Metric | Flex Calculators | Twin Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | — |
| Size | 37 MB | 45 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [An Le](https://appshunter.io/developer/1863975090) | [Hiroki Sugiyama](https://appshunter.io/developer/6778858327) |

## What reviewers say

### Flex Calculators

[App page](https://appshunter.io/ios/app/flex-calculators/id6761326502)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


### Twin Calc

[App page](https://appshunter.io/ios/app/twin-calc-two-calculators/id6807615879)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO | $3.99 | one-time |


## Frequently asked questions

### Is Flex Calculators free?

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

### Is Twin Calc free?

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

### Do Flex Calculators or Twin Calc have ads?

Neither Flex Calculators nor Twin Calc shows ads.

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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.*