# PDFExchanger vs Timetable‑Principal Version

The clearest difference is in-app purchases: PDFExchanger at none against Timetable‑Principal Version's 3. Timetable‑Principal Version's advantage is ads (none vs shown) and update cadence (every 3 days vs every 2 weeks). On price there is nothing between them.

Both are free to download. Timetable‑Principal Version sells 3 in-app purchases, starting at $1.99 per month. PDFExchanger asks for nothing beyond the download.

PDFExchanger ships an update every 2 weeks, Timetable‑Principal Version every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | PDFExchanger | Timetable‑Principal Version |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Size | 15 MB | 18 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [楚城 卓](https://appshunter.io/developer/1565528837) | [shouhui qi](https://appshunter.io/developer/1185710456) |

## What reviewers say

### PDFExchanger

[App page](https://appshunter.io/ios/app/pdfexchanger/id6760964911)

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

**In-app purchases:** none


### Timetable‑Principal Version

[App page](https://appshunter.io/ios/app/timetableprincipal-version/id6810970384)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gold VIP | $1.99 | per month |
| Diamond VIP | $3.99 | per month |
| Supreme VIP | $5.99 | per month |


## Frequently asked questions

### Is PDFExchanger free?

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

### Is Timetable‑Principal Version free?

Timetable‑Principal Version is free to download, with in-app purchases available.

### Do PDFExchanger or Timetable‑Principal Version have ads?

PDFExchanger shows ads; Timetable‑Principal Version does not.

### Which is updated more often, PDFExchanger or Timetable‑Principal Version?

PDFExchanger ships an update every 2 weeks, and Timetable‑Principal Version every 3 days. Most recently, PDFExchanger was updated on October 31, 2026 and Timetable‑Principal Version on October 31, 2026.

---

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