# PDF App vs DING fyi

The clearest difference is update cadence: DING fyi at every 6 days against PDF App's every 5 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDF App sells 1 in-app purchase, starting at $9.99 per 7 days and DING fyi sells 4 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

PDF App ships an update every 5 weeks, DING fyi every 6 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PDF App | DING fyi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (949 ratings)](https://appshunter.io/ios/app/pdf-app-convert-create-sign/id6504335533/reviews)** | — |
| Number of ratings | **949** | — |
| Positive reviews | 36.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 6 days** |
| Monetization | Subscription | — |
| Size | 73 MB | 52 MB |
| Requires iOS | 15.4 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Minimodev Technologies LTD](https://appshunter.io/developer/1497577475) | [Ding FYI Communication Technologies Inc.](https://appshunter.io/developer/1856298344) |

## What reviewers say

### PDF App

[App page](https://appshunter.io/ios/app/pdf-app-convert-create-sign/id6504335533)

Manage PDFs effortlessly with this comprehensive tool. Create, convert, sign, edit, and merge documents with ease. Streamline your workflow and enhance document accessibility.

**Highlights:** Create PDFs from layouts or images, Convert various file formats to PDF, Sign documents with custom signatures, Edit existing PDF files, Merge multiple PDF documents, Export and share PDFs easily

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $9.99 | per 7 days |

**What reviewers like**

- 👍 Good app
- 👍 Useful for creating PDFs

**What reviewers complain about**

- 🚫 Subscription is expensive
- 🚫 Difficult to cancel subscription
- 🚫 App doesn't work as expected
- 🚫 Attempted to scam users

**Reported bugs**

- App doesn't allow creating accounts
- Doesn't convert text messages to PDF

**Requested features**

- Make the app free
- Improve subscription cancellation process


### DING fyi

[App page](https://appshunter.io/ios/app/ding-fyi/id6755784325)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ding Starter Monthly | $19.99 | per month |
| Ding Unlimited Monthly | $39.99 | per month |
| Ding Starter Yearly | $199.99 | per year |
| Ding Unlimited Yearly | $399.99 | per year |


## Frequently asked questions

### Is PDF App free?

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

### Is DING fyi free?

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

### Do PDF App or DING fyi have ads?

Neither PDF App nor DING fyi shows ads.

### Which is updated more often, PDF App or DING fyi?

PDF App ships an update every 5 weeks, and DING fyi every 6 days. Most recently, PDF App was updated on October 27, 2026 and DING fyi 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.*