Mastro's real workplace is a customer's bathroom, not a desk. The phone version is the same app — installed from the browser in ten seconds, and built to survive the place every contractor knows: the basement with no signal.
Install it from the browser
No app store, nothing to download:
- Android / Chrome: the app offers Add to home screen — accept, done.
- iPhone / Safari: tap Share, then Add to Home Screen.
You get a home-screen icon and a full-screen app. Because it's the deployed web app, it's always current — there are no updates to install. Once it's on your phone, turn on push notifications so a signed quote buzzes your pocket.
What works with no signal
The part that matters most offline is the part built for it: capturing a quote. Measurements, scope, materials, pricing — all of it runs on the device. The AI room render needs connectivity, and the rest doesn't wait for it.
App pages that show live business data (the board, the inbox) do need a connection — deliberately. Mastro never keeps your business data cached on a device, so a shared or lost phone never shows one org's jobs to the next person who opens it.
The offline quote queue
Sign a quote in that no-signal basement and Mastro queues it on the device — a chip shows "1 quote waiting to sync". Back on signal, it saves itself. Two guarantees behind that chip:
- It only replays under you. A queued quote saves only under the same sign-in that captured it — signing out, or someone else using the device, never files your quote into the wrong place.
- It never guesses. If a save was interrupted mid-flight and Mastro can't be sure it didn't already land, the quote is held with a retry button instead of being resent blindly — so nothing is ever saved twice behind your back.
One more offline courtesy
If you open a public Mastro page with no connection, you get a proper offline page rather than a browser error — and everything above means the workflow that earns money, quoting on site, never depends on the basement's reception.