# PDF Viewer by Nutrient vs Rhubarb Reminders

The clearest difference is in-app purchases: Rhubarb Reminders at none against PDF Viewer by Nutrient's 2. Rhubarb Reminders also leads on update cadence (every 10 days vs monthly). PDF Viewer by Nutrient's advantage is device support (4 vs 1) and iOS requirement (17.0 vs 26.0). On price and ads 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. Rhubarb Reminders asks for nothing beyond the download.

PDF Viewer by Nutrient ships an update monthly, Rhubarb Reminders every 10 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PDF Viewer by Nutrient | Rhubarb Reminders |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (9.1K ratings)](https://appshunter.io/ios/app/pdf-viewer-by-nutrient/id1120099014/reviews)** | — |
| Number of ratings | **9.1K** | — |
| Positive reviews | 73.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Freemium | — |
| Size | 111 MB | 8 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [PSPDFKit GmbH](https://appshunter.io/developer/966931428) | [Meikle Bin LLC](https://appshunter.io/developer/1885934883) |

## 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. Access files from cloud services, fill out forms, add signatures, and organize your documents. Advanced features are available through a subscription.

**Highlights:** View, search, and annotate PDFs, Cloud service integration, Fill out forms and add signatures, Create and edit PDF pages, Password protection, Night mode and text-to-speech

**Features:** Family Sharing, iMessage stickers, iPhone Duo support

**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


### Rhubarb Reminders

[App page](https://appshunter.io/ios/app/rhubarb-reminders/id6809996750)

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

**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 Rhubarb Reminders free?

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

### Do PDF Viewer by Nutrient or Rhubarb Reminders have ads?

Neither PDF Viewer by Nutrient nor Rhubarb Reminders shows ads.

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

PDF Viewer by Nutrient ships an update monthly, and Rhubarb Reminders every 10 days. Most recently, PDF Viewer by Nutrient was updated on November 7, 2026 and Rhubarb Reminders 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.*