# CalcFlex vs Sextuple Calc

The clearest difference is in-app purchases: Sextuple Calc at none against CalcFlex's 6. Sextuple Calc also leads on device support (3 vs 1) and iOS requirement (15.8.3 vs 17.0). CalcFlex's advantage is ads (none vs shown). On price and update cadence there is nothing between them.

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

CalcFlex ships an update every 9 days, Sextuple Calc every 2 weeks. The most recent releases landed on October 25, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | CalcFlex | Sextuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Size | 2 MB | 36 MB |
| Requires iOS | 17.0 | **15.8.3** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Chiu Loong Ng](https://appshunter.io/developer/1755978644) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### 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 |


### Sextuple Calc

[App page](https://appshunter.io/ios/app/sextuple-calc/id6742039709)

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

**In-app purchases:** none


## Frequently asked questions

### Is CalcFlex free?

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

### Is Sextuple Calc free?

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

### Do CalcFlex or Sextuple Calc have ads?

Sextuple Calc shows ads; CalcFlex does not.

### Which is updated more often, CalcFlex or Sextuple Calc?

CalcFlex ships an update every 9 days, and Sextuple Calc every 2 weeks. Most recently, CalcFlex was updated on October 25, 2026 and Sextuple Calc on November 4, 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.*