# Understandify vs Fast Word to PDF

The clearest difference is in-app purchases: Understandify at none against Fast Word to PDF's 1. Understandify also leads on iOS requirement (15.1 vs 18.5). Fast Word to PDF's advantage is update cadence (every 8 days vs every 13 months) and device support. On price there is nothing between them.

Both are free to download. Fast Word to PDF sells 1 one-off in-app purchase. Understandify asks for nothing beyond the download.

Understandify ships an update every 13 months, Fast Word to PDF every 8 days. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Understandify | Fast Word to PDF |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 13 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 63 MB | 23 MB |
| Requires iOS | **15.1** | 18.5 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Done Enterprises Ab Oy](https://appshunter.io/developer/1675347771) | [Antonio Gonzalez de la aleja german](https://appshunter.io/developer/1839645711) |

## What reviewers say

### Understandify

[App page](https://appshunter.io/ios/app/understandify/id6445995873)

**In-app purchases:** none


### Fast Word to PDF

[App page](https://appshunter.io/ios/app/fast-word-to-pdf/id6754394871)

Convert Word documents (DOC/DOCX) to PDF format quickly and securely on your device. Ideal for professionals and students needing to share files accurately while preserving original formatting. Save and share your converted PDFs with ease.

**Highlights:** Convert DOC/DOCX to PDF, Fast and efficient conversion, Preserves original formatting, Secure on-device processing, Simple, user-friendly interface, Easy saving and sharing

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Understandify free?

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

### Is Fast Word to PDF free?

Fast Word to PDF is free to download, with in-app purchases available.

### Which is updated more often, Understandify or Fast Word to PDF?

Understandify ships an update every 13 months, and Fast Word to PDF every 8 days. Most recently, Understandify was updated on October 6, 2026 and Fast Word to PDF on October 2, 2026.

---

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