# PdfToolBox vs Date Calculation Assistant

The clearest difference is in-app purchases: PdfToolBox at none against Date Calculation Assistant's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Date Calculation Assistant sells 2 in-app purchases, starting at $0.99 per month. PdfToolBox asks for nothing beyond the download.

PdfToolBox ships an update every 4 days, Date Calculation Assistant every 5 days. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | PdfToolBox | Date Calculation Assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Size | 5 MB | 35 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hidayet Balin](https://appshunter.io/developer/1861412496) | [玉辉 黄](https://appshunter.io/developer/1852393919) |

## What reviewers say

### PdfToolBox

[App page](https://appshunter.io/ios/app/pdftoolbox/id6756569800)

**Features:** macOS Compatibility

**In-app purchases:** none


### Date Calculation Assistant

[App page](https://appshunter.io/ios/app/date-calculation-assistant/id6758889725)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Yearly Subscription | $5.99 | per year |


## Frequently asked questions

### Is PdfToolBox free?

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

### Is Date Calculation Assistant free?

Date Calculation Assistant is free to download, with in-app purchases available.

### Do PdfToolBox or Date Calculation Assistant have ads?

Neither PdfToolBox nor Date Calculation Assistant shows ads.

### Which is updated more often, PdfToolBox or Date Calculation Assistant?

PdfToolBox ships an update every 4 days, and Date Calculation Assistant every 5 days. Most recently, PdfToolBox was updated on September 30, 2026 and Date Calculation Assistant on October 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*