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Everything in version 2.0

One canvas for enterprise, systems and software architecture. Here is what it does, and which plan each part comes with.

The canvas

Element Selector

Every element type of the canvas notation, with search and favourites. Slide a row left and tap Add.

Free

Drag-onto connect

Drag one element over another and pause. Only the relationships the notation allows are offered.

Free

Diagram types

Touch and hold the canvas title to choose a diagram type. The palette and rules follow it.

Free

Canvas Selector

Thumbnails of every canvas, grouped by notation, with element and connector counts.

Free

Grid, snap and resize

Show a grid, snap to it, or resize the canvas to fit everything on it.

Free

Magnify and move together

Zoom from ×0.5 to ×2.5, or move every element as one group.

Free

Inspect and edit

Tap an element for its properties; the panel follows the notation’s own attributes.

Free

Undo and redo

Every canvas operation can be undone, in order.

Free

Print to PDF

Triple-tap an empty part of the canvas to print it or save it as a PDF.

Free

Canvas Selector

Canvas Selector - shown for ArchitectBuddies™ running on iPad

Notations

NOTATION

FOR

INCLUDED WITH

UML® 2.5.1

Software and systems design: class, component, sequence, state machine and more

Free (limits) · Pro (no limits)

OMG SysML® v2

Systems engineering: parts, ports, interfaces, requirements, states

Free (limits) · Pro (no limits)

ArchiMate® 3.2 Standard

Enterprise architecture

EA Notation subscription

ArchiMate® 4.0 Standard

Enterprise architecture

EA Notation subscription

An imported model keeps the notation it was saved in. The notation you pick on the Welcome screen is the default for new canvases only.

More ways to model

Pro

One Buddy for direct edits, or a Team working to a plan with stage gates and documents.

Pro

Voice Builder

Say the element type, then its name. Say ‘connector’ to join two elements by name.

Pro

Create Illustration

Turn a canvas into a picture in a style you choose. It opens on its own canvas and can be saved to Photos.

S10-create-illustration.jpeg

Pro

Create a canvas from an image

Pick a photo, a file or a pasted screenshot of a diagram, and One Buddy redraws it as a model. Needs a model that can read images.

Import and export

Save and Export are the same action (⌘S). A model is saved as an ArchitectBuddies Model Bundle (.abmodel) together with one exchange file for each notation it uses. Import adds canvases, elements and connectors to your model; nothing is replaced.

.abmodel

Pro or EA Notation

ArchitectBuddies Model Bundle

.xml

EA Notation

ArchiMate® Open Exchange File Format

.sysml / .json

Pro

SysML® v2 textual notation and JSON

.xml (XMI)

Pro

UML® XMI

On the Mac, too

ArchitectBuddies™ runs on Macs with Apple silicon. The chat opens as a side column beside the canvas, trackpad pinch zooms, right-click does what touch and hold does on iPad, and every canvas button has a keyboard shortcut.

S1-alt-hero-sysml-canvas-and-team-chat.jpg

Help built in

Help Home has search, ‘What’s this?’ for any control, one sheet of every gesture and shortcut, and step-by-step how-tos with ‘Try it’.

Help Home in ArchitectBuddies

Try it on your iPad or Mac

Orange-to-blue gradient divider line
ArchitectBuddies app icon

ArchitectBuddies™

Enterprise, systems and software architecture for iPad and Mac.

ArchiMate is a registered trademark of The Open Group in the United States and other countries.

OMG, SysML and UML are registered trademarks of Object Management Group, Inc. in the United States and/or other countries.

Apple, iPad, Mac and App Store are trademarks of Apple Inc., registered in the U.S. and other countries and regions.

The Arcadia-aligned planner is an independent implementation of the publicly described Arcadia method and is not affiliated with or endorsed by its originators.

© 2026 Hytsioaboa Software Limited. ArchitectBuddies™ and HytsioStudio are trading names of Hytsioaboa Software Limited. Registered in England and Wales, Company No. 16784431. Registered Office: 1 Pastoral Road, Bristol, BS35 1BG.

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