# Calculator vs Flex Calculators

The clearest difference is in-app purchases: Calculator at none against Flex Calculators's 1. Calculator also leads on update cadence (every 3 days vs every 10 days) and iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Flex Calculators sells 1 one-off in-app purchase. Calculator asks for nothing beyond the download.

Calculator ships an update every 3 days, Flex Calculators every 10 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calculator | Flex Calculators |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 10 days |
| Size | 19 MB | 37 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SEOKWON YANG](https://appshunter.io/developer/1863325487) | [An Le](https://appshunter.io/developer/1863975090) |

## What reviewers say

### Calculator

[App page](https://appshunter.io/ios/app/calculator-slox/id6757248766)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Calculator free?

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

### Is Flex Calculators free?

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

### Do Calculator or Flex Calculators have ads?

Neither Calculator nor Flex Calculators shows ads.

### Which is updated more often, Calculator or Flex Calculators?

Calculator ships an update every 3 days, and Flex Calculators every 10 days. Most recently, Calculator was updated on October 28, 2026 and Flex Calculators on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*