# KDCA vs CalcFlex

The clearest difference is in-app purchases: KDCA at none against CalcFlex's 6. KDCA also leads on iOS requirement (15.0 vs 17.0). On price there is nothing between them.

Both are free to download. CalcFlex sells 3 one-off in-app purchases. KDCA asks for nothing beyond the download.

## The numbers

| Metric | KDCA | CalcFlex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 9 days |
| Size | 57 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | — | **iPhone** |
| Age rating | 4+ | 4+ |
| Developer | [Korea NFT Certificate Authority](https://appshunter.io/developer/1625234292) | [Daniel Chiu Loong Ng](https://appshunter.io/developer/1755978644) |

## What reviewers say

### KDCA

[App page](https://appshunter.io/ios/app/kdca/id6483237799)

**In-app purchases:** none


### 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 KDCA free?

KDCA is free to download, with no in-app purchases.

### Is CalcFlex free?

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

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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.*