ScaleInkPen & marker
Choose line width and color to write instructions and review notes right on the drawing.
An iPad drawing review app for architecture, design, and construction
Mark up and measure PDF drawings on your iPad.
Review drawings, measure to scale, and organize your notes in layers, all in one app. With ScaleInk, open a drawing and mark it up, measure it, and sort out your notes right on the spot.
iPad only · Apple Pencil supported · No ScaleInk account required
REDLINE
Spot an issue?
Mark it up right on the drawing.
ScaleInk lets you write directly on PDF drawings with Apple Pencil. Besides the pen, marker, and eraser, you can leave instructions with text and shapes.
No printing needed. Keep reviewing right on the drawing, as you look at it.
MEASUREMENT
Set the scale and measure on the spot.
Register the scale from a known dimension on the drawing. Trace the span you want to measure, and the real-world length appears right on the drawing.
No need to re-apply a paper scale. Check distances and dimensions directly on the PDF.
Works with both metric and feet-and-inches units.
LAYERS
Keep review marks and wiring notes on separate layers.
Organize your markup and equipment notes on separate layers. Toggle visibility to see only the notes you need.
You can also rename, duplicate, adjust the opacity of, and lock layers.
PROJECTS
Keep your drawings organized by project.
Imported PDFs are saved by project. Floor plan studies, detail reviews, renovation jobs: organize your work by project while browsing thumbnails.
Jump back to the drawing you need and pick up where your last review left off.
TOOLKIT
Everything drawing review needs,
in one app.
Text & shapes
Use text, lines, rectangles, and more to capture what handwriting alone can't make clear.
Ruler
Show a ruler on screen and draw straight lines while keeping the angle.
Reference PDF layer
Overlay another PDF page as a reference PDF layer and compare the two while aligning their positions.
Multiple pages
Work with multi-page PDF drawings in a single project, without worrying about page count.
PDF export
Export a PDF that reflects your review and share it as is.
PRICING
Start free.
Upgrade to Pro when you need more.
The free version includes the basics: PDF markup, scale measurement, layer management, and PDF export.
When you want more projects or layers, you can upgrade to ScaleInk Pro.
ScaleInk Free
Free to start
- Projects: up to 3
- Layers: up to 4 per page in total
- PDF pages: unlimited
- Markup and handwriting
- Text and shapes
- Scale registration and measurement
- PDF export with no watermark
ScaleInk Pro
No limits on projects or layers
MonthlyAnnualLifetime
- Everything in Free
- Unlimited projects
- Unlimited layers
- Create, move, and duplicate Stacks
Monthly / Annual: Use the ScaleInk Pro features. Ongoing online services may be added in the future.
Lifetime: One purchase gives you lasting access to the ScaleInk Pro features provided on your device, with no expiration.
Plan and purchase terms (Japanese)The Lifetime plan supports Family Sharing. The layer limit includes the original PDF background. Prices are shown in your local currency on the App Store.
FAQ
Frequently asked questions
Which devices does ScaleInk run on?
ScaleInk is an iPad-only app. You can use Apple Pencil for writing on drawings and working with them.
Can I write directly on PDF drawings?
Yes. Import a standard PDF drawing and add your review with the pen, marker, text, shapes, and more.
How do I measure dimensions on a PDF drawing?
Register the scale using a known dimension shown on the drawing, then pick the two points you want to measure. Results are displayed based on the scale you registered. Both metric and feet-and-inches units are supported.
Can I measure and export PDFs with the free version?
Yes. The free version includes scale registration, measurement, and PDF export. Exported PDFs have no watermark.
What limits does the free version have?
You can create up to 3 projects in total, and up to 4 layers per page in total, including the original PDF background. There is no limit on the number of PDF pages.
Do I need an account?
No ScaleInk account is required. Cloud sync and collaborative editing are not supported at this time.
SCALEINK
Your next drawing review,
from your iPad.
Import a PDF, then mark it up, measure it, and organize it.
ScaleInk is free to start.
Start free on the App StoreiPad only · Apple Pencil supported