# ExRate Calculator vs CalcFlex

The clearest difference is in-app purchases: ExRate Calculator at none against CalcFlex's 6. ExRate Calculator also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). CalcFlex's advantage is ads (none vs shown) and update cadence (every 9 days vs every 6 weeks). On price there is nothing between them.

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

ExRate Calculator ships an update every 6 weeks, CalcFlex every 9 days. The most recent releases landed on November 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ExRate Calculator | CalcFlex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Size | 34 MB | 2 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Kam To Cheng](https://appshunter.io/developer/1503889932) | [Daniel Chiu Loong Ng](https://appshunter.io/developer/1755978644) |

## What reviewers say

### ExRate Calculator

[App page](https://appshunter.io/ios/app/exrate-calculator/id6473137992)

**Features:** macOS Compatibility

**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 ExRate Calculator free?

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

### Is CalcFlex free?

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

### Do ExRate Calculator or CalcFlex have ads?

ExRate Calculator shows ads; CalcFlex does not.

### Which is updated more often, ExRate Calculator or CalcFlex?

ExRate Calculator ships an update every 6 weeks, and CalcFlex every 9 days. Most recently, ExRate Calculator was updated on November 4, 2026 and CalcFlex on October 25, 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.*