# SignPDF vs Sign.Plus

The clearest difference is rating: Sign.Plus at 4.8 against SignPDF's 4.4. Sign.Plus also leads on update cadence (every 3 weeks vs every 3 months). SignPDF's advantage is iOS requirement (6.0 vs 15.0). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. SignPDF sells 3 one-off in-app purchases and Sign.Plus sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Sign.Plus holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 105 and 288 respectively. Written reviews split almost evenly too, at 85% and 86% positive.

SignPDF ships an update every 3 months, Sign.Plus every 3 weeks. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | SignPDF | Sign.Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (105 ratings)](https://appshunter.io/ios/app/signpdf-quickly-annotate-pdf/id596126185/reviews) | **[4.8 (288 ratings)](https://appshunter.io/ios/app/signplus-sign-pdf-documents/id1478723637/reviews)** |
| Number of ratings | 105 | **288** |
| Positive reviews | 85.1% of reviews | **86.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 12 MB | 137 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tektrify, Inc](https://appshunter.io/developer/400337660) | [Alohi](https://appshunter.io/developer/1172555270) |

## 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.Plus

[App page](https://appshunter.io/ios/app/signplus-sign-pdf-documents/id1478723637)

This app provides a secure and legally-binding electronic signature solution for signing documents on mobile devices. It allows users to fill and sign PDFs, scan paper documents, and send documents to others for signature with tamper-proof audit trails.

**Highlights:** Fill and sign documents, Send documents for signature, Tamper-proof audit trails, Legally-binding electronic signatures, Paper scanning to digital, Data encryption

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Personal Plan (One Month) | $14.99 | one-time |
| Premium Plan (One Month) | $29.99 | one-time |
| Personal Plan (One Year) | $119.99 | one-time |
| Professional Plan (One Year) | $239.99 | one-time |

**What reviewers like**

- 👍 Easy to use interface
- 🚀 Efficient document signing
- 🔒 Secure document handling
- 💡 Scans everything easily
- 👍 Convenient for quick signatures

**What reviewers complain about**

- 🐛 Horrible app interface
- 🐛 Difficult to use on phone
- 🐛 Bait and switch tactics
- 🐛 Tricky to unsubscribe
- 🐛 App not working

**Reported bugs**

- App not working
- Freezes occasionally
- Support obstructing work

**Requested features**

- Ability to send documents out
- Improved phone interface


## Frequently asked questions

### Is SignPDF free?

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

### Is Sign.Plus free?

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

### Which has better reviews, SignPDF or Sign.Plus?

Sign.Plus is rated higher. SignPDF averages 4.4 out of 5 from 105 ratings, while Sign.Plus averages 4.8 from 288 ratings.

### Do SignPDF or Sign.Plus have ads?

Neither SignPDF nor Sign.Plus shows ads.

### Which is updated more often, SignPDF or Sign.Plus?

SignPDF ships an update every 3 months, and Sign.Plus every 3 weeks. Most recently, SignPDF was updated on October 7, 2026 and Sign.Plus on October 8, 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.*