See and control one Mac app window — from your phone.
Your AI tools already write and run the code from anywhere. MainVac shows you the window they produced, and lets you tap, scroll and type in it. Keep going. It’s in your hands.
macOS 14+, Apple Silicon · iPhone / iPad (iOS 17+) & Android 12+ apps · 30-day free trial, no account
On the Mac: pick one window, crop it to the part that matters. The rest of your desktop stays private.
On the phone: full-screen control — remote input stays visible on the Mac and off by default.



What it does
One window, cropped
Share a single app window — browser, simulator, preview — cropped so text stays readable on a phone.
Tap, scroll, long-press
Click, right-click via long-press, and scroll. Single-finger touch maps to drag inside simulators.
Real text input
Write in a local bar, inject the whole line at once — with Esc Tab and arrow keys.
Shortcuts per app
The Mac sends shortcut buttons matched to the app you're viewing.
Survives restarts
When the target app relaunches, MainVac finds the same window again. Ambiguous match? It waits — never guesses.
Quick Connect
Pair by QR code — no account. Video and input are end-to-end encrypted; relays only see ciphertext.
Launch apps remotely
Start an installed Mac app from your phone; capture follows its new window. Host-side switch.
Picture in Picture
Keep the window floating over other apps while you work.
Pricing
Start the 30-day free trial No account, no card. Buy inside the app when the trial ends — the key arrives by email.
Questions
Do I need an account?
No. The trial starts on first launch; a purchased license key arrives by email and activates in the app.
How do I move to a new computer?
Deactivate in the app on the old Mac (instant), or remove it on the license page with your key and purchase email.
What does MainVac send to its servers?
Video and input never touch our servers — they're end-to-end encrypted between your devices. Licensing sends a pseudonymous device hash and your key. Details in the privacy policy.
Refunds?
The 30-day trial exists so you can evaluate before paying. See the terms & refund policy.