# PDF Viewer by Nutrient vs Relyn

The clearest difference is in-app purchases: Relyn at none against PDF Viewer by Nutrient's 2. Relyn also leads on rating (5.0 vs 4.6) and update cadence (weekly vs monthly). PDF Viewer by Nutrient's advantage is ratings volume (9.1K vs 1) and iOS requirement (17.0 vs 26.4). On price, ads and device support there is nothing between them.

Both are free to download. PDF Viewer by Nutrient sells 2 in-app purchases, starting at $6.99 per 3 months. Relyn asks for nothing beyond the download.

Relyn holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: PDF Viewer by Nutrient has 9.1K ratings behind it against 1, so its average is the more settled of the two.

PDF Viewer by Nutrient ships an update monthly, Relyn weekly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PDF Viewer by Nutrient | Relyn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (9.1K ratings)](https://appshunter.io/ios/app/pdf-viewer-by-nutrient/id1120099014/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/relyn-commitment-tracker/id6794733773/reviews)** |
| Number of ratings | **9.1K** | 1 |
| Positive reviews | 73.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Freemium | **Free** |
| Size | 109 MB | 6 MB |
| Requires iOS | **17.0** | 26.4 |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [PSPDFKit GmbH](https://appshunter.io/developer/966931428) | [STEVEN COFFEY](https://appshunter.io/developer/1870282463) |

## What reviewers say

### PDF Viewer by Nutrient

[App page](https://appshunter.io/ios/app/pdf-viewer-by-nutrient/id1120099014)

Easily view, search, and annotate PDF documents on your iPhone and iPad. Import files from cloud services, fill out forms, add signatures, and organize your documents. Advanced features like redaction and combining documents are available with a Pro subscription.

**Highlights:** View and search PDFs, Annotate with highlights and notes, Sign documents digitally, Fill out PDF forms, Organize and share documents, Import from cloud services

**Features:** Family Sharing, iMessage stickers

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Viewer Pro 3 Months | $6.99 | per 3 months |
| PDF Viewer Pro Yearly | $19.99 | per year |

**What reviewers like**

- 🚀 Seamless integration with iCloud and Files app
- 👍 Intuitive annotation tools with Apple Pencil
- 🎨 Versatile highlighting and drawing options
- 💾 Saves annotations to original PDF files
- 🔍 Powerful search and navigation features

**What reviewers complain about**

- 🐛 Occasional crashes and performance issues
- 🤔 Confusing UI and steep learning curve
- 🔀 Difficulty managing and organizing PDF files
- 🔍 Inconsistent text selection and highlighting
- 🔒 Privacy concerns around data collection

**Reported bugs**

- Annotations randomly disappearing or not saving
- Incompatibility issues with certain PDF files
- Scrolling and panning problems on large PDFs
- Unexpected crashes after iOS updates

**Requested features**

- Add a rubber/eraser tool for annotations
- Implement a side-by-side PDF view mode
- Improve palm rejection and gesture support
- Allow customization of toolbar and shortcuts
- Provide better options for PDF file management


### Relyn

[App page](https://appshunter.io/ios/app/relyn-commitment-tracker/id6794733773)

This app helps you track commitments made to others, ensuring important promises aren't forgotten. It intelligently captures details like due dates and contacts, and organizes your tasks for follow-through. Syncs across devices and prioritizes relationships.

**Highlights:** Smart Capture for commitments, Follow-through focused task management, Recurring commitment scheduling, Waiting On tracking, Contact-centric commitment history, Siri integration, Home Screen widgets and Apple Watch support

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is PDF Viewer by Nutrient free?

PDF Viewer by Nutrient is free to download, with in-app purchases available.

### Is Relyn free?

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

### Which has better reviews, PDF Viewer by Nutrient or Relyn?

Relyn is rated higher. PDF Viewer by Nutrient averages 4.6 out of 5 from 9.1K ratings, while Relyn averages 5.0 from 1 ratings.

### Do PDF Viewer by Nutrient or Relyn have ads?

Neither PDF Viewer by Nutrient nor Relyn shows ads.

### Which is updated more often, PDF Viewer by Nutrient or Relyn?

PDF Viewer by Nutrient ships an update monthly, and Relyn weekly. Most recently, PDF Viewer by Nutrient was updated on November 3, 2026 and Relyn on October 31, 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.*