# CalcFormula vs CalcFlex

The clearest difference is iOS requirement: CalcFlex at 17.0 against CalcFormula's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CalcFormula sells 1 one-off in-app purchase and CalcFlex sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | CalcFormula | CalcFlex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Size | 16 MB | 2 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [仲达 夏](https://appshunter.io/developer/1436433399) | [Daniel Chiu Loong Ng](https://appshunter.io/developer/1755978644) |

## What reviewers say

### CalcFormula

[App page](https://appshunter.io/ios/app/calcformula/id1436433400)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalcFormula PRO | $0.99 | one-time |


### CalcFlex

[App page](https://appshunter.io/ios/app/calcflex-calculator/id6520389768)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +3 New Variables | $1.99 | one-time |
| +20 New Equation Slots | $1.99 | one-time |
| +1 New Calculator | $3.99 | one-time |


## Frequently asked questions

### Is CalcFormula free?

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

### Is CalcFlex free?

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

### Do CalcFormula or CalcFlex have ads?

Neither CalcFormula nor CalcFlex 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.*