# SignPDF vs Sign Documents

The clearest difference is update cadence: Sign Documents at every 6 weeks against SignPDF's every 3 months. SignPDF's advantage is iOS requirement (6.0 vs 15.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. SignPDF sells 3 one-off in-app purchases and Sign Documents sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.4 for SignPDF against 4.5 for Sign Documents. Both are backed by a comparable volume of ratings — 105 and 65 respectively. Written reviews are what separate them: 85% of SignPDF's written reviews are positive against 89% of Sign Documents's.

SignPDF ships an update every 3 months, Sign Documents every 6 weeks. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | SignPDF | Sign Documents |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (105 ratings)](https://appshunter.io/ios/app/signpdf-quickly-annotate-pdf/id596126185/reviews) | **[4.5 (65 ratings)](https://appshunter.io/ios/app/sign-documents-sign-and-edit-pdf/id6475158813/reviews)** |
| Number of ratings | **105** | 65 |
| Positive reviews | 85.1% of reviews | **88.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 12 MB | 9 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tektrify, Inc](https://appshunter.io/developer/400337660) | [晓峰 刘](https://appshunter.io/developer/1605337002) |

## What reviewers say

### SignPDF

[App page](https://appshunter.io/ios/app/signpdf-quickly-annotate-pdf/id596126185)

Easily sign and fill out PDF documents directly on your device without needing an account. Open PDFs from various cloud services, add your signature, text, and checkmarks, then share or save the completed document.

**Highlights:** Sign documents with your finger, Fill out PDF forms, Add name, initial, and date, Open PDFs from cloud storage, Export signed documents, Print documents via AirPrint

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6 Credits | $1.99 | one-time |
| 24 Credits | $4.99 | one-time |
| Unlimited Credits | $19.99 | one-time |

**What reviewers like**

- 👍 Easy to use and intuitive interface
- 📱 Convenient mobile document signing
- 💰 Affordable pricing with free version available
- ⚡ Fast document processing and export
- 🎯 Saves time eliminating printing and scanning

**What reviewers complain about**

- 🐛 Frequent crashes and freezing issues
- ❌ App fails to open or load past splash screen
- 💳 Limited free credits requiring paid upgrades
- 🔄 Compatibility issues with iOS updates
- 😤 Poor customer support and unresponsive developers

**Reported bugs**

- App crashes when saving or exporting documents
- Signature placement doesn't match preview
- App hangs after opening PDF files
- Freezes on iOS 13.1.3 and newer versions
- Grey screen loading issue on tablets and phones

**Requested features**

- Better credit system or ad-supported alternative
- Automatic text and signature positioning
- Ability to delete saved signatures
- Sync functionality between iPhone and iPad
- More advanced PDF editing features


### Sign Documents

[App page](https://appshunter.io/ios/app/sign-documents-sign-and-edit-pdf/id6475158813)

Easily add signatures, text, and images to your PDF documents. This user-friendly tool offers real-time saving and an intuitive interface for quick document personalization. Ideal for students and professionals needing efficient PDF editing.

**Highlights:** Add signatures, Insert text, Add images, Real-time saving, Intuitive interface, Personalize documents

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Editor PRO | $8.99 | per month |
| Forever Pro | $14.99 | one-time |


## Frequently asked questions

### Is SignPDF free?

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

### Is Sign Documents free?

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

### Which has better reviews, SignPDF or Sign Documents?

Sign Documents is rated higher. SignPDF averages 4.4 out of 5 from 105 ratings, while Sign Documents averages 4.5 from 65 ratings.

### Do SignPDF or Sign Documents have ads?

Neither SignPDF nor Sign Documents shows ads.

### Which is updated more often, SignPDF or Sign Documents?

SignPDF ships an update every 3 months, and Sign Documents every 6 weeks. Most recently, SignPDF was updated on October 17, 2026 and Sign Documents on October 16, 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.*