# XML Viewer vs FormulaPad

The clearest difference is ads: FormulaPad at none against XML Viewer's shown. XML Viewer's advantage is update cadence (fortnightly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. XML Viewer sells 4 in-app purchases, starting at $1.99 per 7 days and FormulaPad sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

XML Viewer ships an update fortnightly, FormulaPad every 2 months. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | XML Viewer | FormulaPad |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 6 MB | 3 MB |
| Requires iOS | 17 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Muhammad Mujahid Khan](https://appshunter.io/developer/1749120554) | [小倩 徐](https://appshunter.io/developer/6771586178) |

## What reviewers say

### XML Viewer

[App page](https://appshunter.io/ios/app/xml-viewer-editor-and-formatter/id6754247662)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $4.99 | per month |
| Yearly | $24.99 | per year |
| Lifetime Premium | $49.99 | one-time |


### 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 XML Viewer free?

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

### Is FormulaPad free?

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

### Do XML Viewer or FormulaPad have ads?

XML Viewer shows ads; FormulaPad does not.

### Which is updated more often, XML Viewer or FormulaPad?

XML Viewer ships an update fortnightly, and FormulaPad every 2 months. Most recently, XML Viewer was updated on October 6, 2026 and FormulaPad on October 15, 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.*