# Drawboard PDF Annotate, Markup vs TrenchCalc

Drawboard PDF Annotate, Markup and TrenchCalc are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Drawboard PDF Annotate, Markup sells 8 in-app purchases, starting at $5.99 per month and TrenchCalc sells 5 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Drawboard PDF Annotate, Markup ships an update weekly, TrenchCalc every 8 days. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Drawboard PDF Annotate, Markup | TrenchCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2K ratings)](https://appshunter.io/ios/app/drawboard-pdf-annotate-markup/id1086503728/reviews)** | — |
| Number of ratings | **2K** | — |
| Positive reviews | 64.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Monetization | Free with in-app purchases | — |
| Size | 98 MB | 130 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Drawboard Pty Ltd](https://appshunter.io/developer/1081203672) | [VINCENT WEI HON ZHENG](https://appshunter.io/developer/1837052899) |

## 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, iPhone Duo 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


### TrenchCalc

[App page](https://appshunter.io/ios/app/trenchcalc/id6751827956)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Plan | $2.99 | per month |
| Pro Plan | $4.99 | per month |
| Basic Plan | $29.99 | per year |
| Pro Plan | $49.99 | per year |
| TrenchCalc Pro | $5.99 | one-time |


## Frequently asked questions

### Is Drawboard PDF Annotate, Markup free?

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

### Is TrenchCalc free?

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

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

Neither Drawboard PDF Annotate, Markup nor TrenchCalc shows ads.

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

Drawboard PDF Annotate, Markup ships an update weekly, and TrenchCalc every 8 days. Most recently, Drawboard PDF Annotate, Markup was updated on October 29, 2026 and TrenchCalc on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*