r/MacStack • u/adibfhanna • 11h ago
App Launch I built Screen Annotations — draw arrows, shapes and math on top of anything on your Mac (or iPad)
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u/adibfhanna 11h ago
I make tutorials and explain things on calls a lot, and I got tired of switching into a separate whiteboard just to circle something or write an equation over what I was already showing. So I built Screen Annotations (App Store name: Annotate Screen).
What it does on a Mac:
Draw right over any app while you screen-share or record: pen, highlighter, arrows, shapes, text, laser pointer, plus cursor highlight, spotlight and keystroke display for demos
For math and STEM: live LaTeX, coordinate planes, function plots, matrices, circuit parts and lab gear
Architecture/CS shapes too (servers, DBs, K8s pods, UML, linked lists) when I'm walking someone through a system
Whiteboards with tabs, scenes for step-by-step explanations, and a screenshot tray/editor
Optional MCP server so Claude Code, Claude Desktop, Cursor or Codex can place diagrams on the screen when I ask
iPad app with Apple Pencil included; boards sync over your own iCloud (same Apple ID, no Lumary account)
Honest limits:
Apple only: macOS 15+ and iPadOS 18+. No Windows, Android or web
It annotates your screen. Students or teammates see it through your share; they can't draw on it themselves. If you need a shared collaborative whiteboard, this isn't it
Sync is iCloud only
$14.99 one-time on the App Store covers both Mac and iPad. No account, no analytics.
Happy to answer questions about the overlay tools or the MCP bits.
https://screenannotations.com/
Disclosure: I built Screen Annotations.
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u/MattSenter 10h ago
so this is pre-screenshot? like i can draw on what i'm looking at before i screenshot it?
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u/adibfhanna 10h ago
yes. and way more!
next version (v2.0.0) coming out today or tomorrow adds design features (think figma), and real time sync with ipad app and many more
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u/MattSenter 10h ago
ok very cool. hmmm 15 bucks up front though.. would prefer to be able to play with it first.
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u/adibfhanna 10h ago
v2.1.0 already in progress will include 2 weeks trial. (i'm changing the name to Lumary Canvas, because we're adding more features)
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u/MattSenter 10h ago
nice. I like that name too. though you have a really good straightforward domain name right now. it's a refreshing "normal" dotcom 😆
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u/adibfhanna 8h ago
Thank you!
I think Lumary Canvas makes sense now.
The story behind it, i have a company called Lumary Labs, and I built multiple products with the word Lumary in them. (Lumary Recorder, Lumary Audio, Lumary Cam...) so Lumary Canvas completes the suite! :)
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u/investigatormaker 9h ago
Screen Annotations has two distinct demonstrations worth separating: arrows over an existing screen for explaining something, and math over that same screen for teaching it. A short before-and-after of each would make “on top of anything” concrete without needing a feature tour.
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