# Drawboard PDF Annotate, Markup vs Triofox

The clearest difference is in-app purchases: Triofox at none against Drawboard PDF Annotate, Markup's 8. Triofox also leads on rating (5.0 vs 4.8) and iOS requirement (14.0 vs 17.0). Drawboard PDF Annotate, Markup's advantage is update cadence (weekly vs every 4 months) and ratings volume (1.9K vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Drawboard PDF Annotate, Markup sells 8 in-app purchases, starting at $5.99 per month. Triofox asks for nothing beyond the download.

Triofox holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Drawboard PDF Annotate, Markup has 1.9K ratings behind it against 1, so its average is the more settled of the two.

Drawboard PDF Annotate, Markup ships an update weekly, Triofox every 4 months. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Drawboard PDF Annotate, Markup | Triofox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (1.9K ratings)](https://appshunter.io/ios/app/drawboard-pdf-annotate-markup/id1086503728/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/triofox/id1501984846/reviews)** |
| Number of ratings | **1.9K** | 1 |
| Positive reviews | 64.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 97 MB | 27 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Drawboard Pty Ltd](https://appshunter.io/developer/1081203672) | [Gladinet, Inc.](https://appshunter.io/developer/491984928) |

## What reviewers say

### Drawboard PDF Annotate, Markup

[App page](https://appshunter.io/ios/app/drawboard-pdf-annotate-markup/id1086503728)

Enhance your PDF workflow with powerful annotation and markup tools. This app offers a dynamic and intuitive experience for editing, drawing, and adding text to your documents. Access your work across multiple devices and collaborate in real-time.

**Highlights:** Dynamic PDF annotation tools, Cross-platform access and cloud sync, Real-time collaboration, Insert text, images, lines, and shapes, Convert images to PDF, Redact sensitive information (Pro), Measurement tools (Pro)

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lite | $5.99 | per month |
| Pro Plus | $9.99 | per month |
| Pro Unlimited | $18.99 | per month |
| Pro Lite | $49.99 | per year |
| Pro Plus | $83.90 | per year |
| Pro Unlimited | $159.99 | per year |
| Pro Plus | $10.00 | one-time |
| Pro Unlimited | $20.00 | one-time |

**What reviewers like**

- 🚀 Excellent PDF annotation tools
- 👍 Convenient cross-platform sync
- 🚀 Fast and responsive
- 👍 Great for students and professionals
- 🚀 Smooth writing experience with Apple Pencil

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 🔒 Cloud storage limitations
- 💰 Expensive subscription model
- 🔍 Missing search and bookmark features
- 🔧 Inconsistent functionality between platforms

**Reported bugs**

- Annotations not syncing properly between devices
- Unexpected loss of work and unsaved changes
- Scrolling and page navigation issues
- Compatibility problems with certain PDF files
- Text input box disappearing after scrolling

**Requested features**

- Add page flattening and form filling options
- Improve eraser tool and precision
- Implement a dark mode
- Provide better organization and folder support
- Add more customization options for tools and UI


### Triofox

[App page](https://appshunter.io/ios/app/triofox/id1501984846)

Access your Windows file servers from your mobile devices. This app provides secure file sharing, data protection, and cloud migration capabilities for your mobile workforce, ensuring data privacy and control.

**Highlights:** Mobile file server access, Secure file sharing, Data protection, Cloud migration, Enhanced workforce productivity

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

**In-app purchases:** none


## Frequently asked questions

### Is Drawboard PDF Annotate, Markup free?

Drawboard PDF Annotate, Markup is free to download, with in-app purchases available.

### Is Triofox free?

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

### Which has better reviews, Drawboard PDF Annotate, Markup or Triofox?

Triofox is rated higher. Drawboard PDF Annotate, Markup averages 4.8 out of 5 from 1.9K ratings, while Triofox averages 5.0 from 1 ratings.

### Do Drawboard PDF Annotate, Markup or Triofox have ads?

Neither Drawboard PDF Annotate, Markup nor Triofox shows ads.

### Which is updated more often, Drawboard PDF Annotate, Markup or Triofox?

Drawboard PDF Annotate, Markup ships an update weekly, and Triofox every 4 months. Most recently, Drawboard PDF Annotate, Markup was updated on September 22, 2026 and Triofox on September 10, 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.*