# Call Again vs FormulaPad

The clearest difference is in-app purchases: Call Again at none against FormulaPad's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. FormulaPad sells 1 one-off in-app purchase. Call Again asks for nothing beyond the download.

## The numbers

| Metric | Call Again | FormulaPad |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [晓 郭](https://appshunter.io/developer/1895645928) | [小倩 徐](https://appshunter.io/developer/6771586178) |

## What reviewers say

### Call Again

[App page](https://appshunter.io/ios/app/call-again/id6776090231)

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

**In-app purchases:** none


### FormulaPad

[App page](https://appshunter.io/ios/app/formulapad/id6785820497)

A local-first math notebook calculator for iPhone. Type natural formulas, reuse variables, and save calculations as notes. Includes practical templates and unit conversions for everyday math needs.

**Highlights:** Natural formula input, Variable reuse, Calculation history, Math notes, Practical templates, Unit conversion, Function plotting

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FormulaPad Pro | $0.99 | one-time |


## Frequently asked questions

### Is Call Again free?

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

### Is FormulaPad free?

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

### Do Call Again or FormulaPad have ads?

Neither Call Again nor FormulaPad 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.*