# ContactVault Pro vs FormulaPad

The clearest difference is price: FormulaPad at Free against ContactVault Pro's $2.99. ContactVault Pro's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

FormulaPad is free to download; ContactVault Pro costs $2.99 up front. FormulaPad sells 1 one-off in-app purchase. ContactVault Pro asks for nothing beyond the download.

## The numbers

| Metric | ContactVault Pro | FormulaPad |
| --- | --- | --- |
| Price | $2.99 | **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 | 2 MB | 3 MB |
| Requires iOS | 17 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [贺 周](https://appshunter.io/developer/1815397078) | [小倩 徐](https://appshunter.io/developer/6771586178) |

## What reviewers say

### ContactVault Pro

[App page](https://appshunter.io/ios/app/contactvault-pro/id6765813810)

**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 ContactVault Pro free?

ContactVault Pro costs $2.99, with no in-app purchases.

### Is FormulaPad free?

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

### Do ContactVault Pro or FormulaPad have ads?

Neither ContactVault Pro 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.*