# Formula Calculator # vs DocBox

The clearest difference is ads: DocBox at none against Formula Calculator #'s shown. Formula Calculator #'s advantage is iOS requirement (12.0 vs 15.5). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Formula Calculator # sells 4 one-off in-app purchases and DocBox sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Formula Calculator # ships an update every 5 weeks, DocBox every 6 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Formula Calculator # | DocBox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/formula-calculator/id6504839903/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 67 MB | 96 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [威 刘](https://appshunter.io/developer/1465235012) | [啸 胡](https://appshunter.io/developer/1723348989) |

## What reviewers say

### Formula Calculator #

[App page](https://appshunter.io/ios/app/formula-calculator/id6504839903)

Perform calculations with a vast library of built-in formulas or create your own. Save and sync custom formulas to the cloud for easy access across devices. Includes a comprehensive scientific calculator.

**Highlights:** Extensive built-in calculation formulas, Create and save custom formulas, Cloud synchronization for custom formulas, Share custom formulas with others, Comprehensive scientific calculator

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month subscription | $1.49 | one-time |
| 3 months subscription | $2.49 | one-time |
| 6 months subscription | $3.49 | one-time |
| 1 year subscription | $4.49 | one-time |


### DocBox

[App page](https://appshunter.io/ios/app/docbox-personal-document-hub/id6769789619)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DocBox Plus | $1.99 | per month |
| DocBox Plus | $9.99 | per year |


## Frequently asked questions

### Is Formula Calculator # free?

Formula Calculator # is free to download, with in-app purchases available.

### Is DocBox free?

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

### Do Formula Calculator # or DocBox have ads?

Formula Calculator # shows ads; DocBox does not.

### Which is updated more often, Formula Calculator # or DocBox?

Formula Calculator # ships an update every 5 weeks, and DocBox every 6 weeks. Most recently, Formula Calculator # was updated on October 24, 2026 and DocBox on October 24, 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.*