RecoatWindow: Second Coat

The tin says "recoat after 4 hours" — but that figure assumes 21C and 50% humidity.
In an unheated back bedroom or a damp February hallway the real wait can be twice that, and nothing tracks it for you.
RecoatWindow takes the recoat time printed on your tin and stretches it to the air you are actually decorating in.

WHY A WINDOW, NOT A TIME
Published drying guidance exists as broad bands, not as a formula. So RecoatWindow does not invent one.
You get "ready between 5h20m and 7h10m from now" — a window with a start and an end, not a single promise.
It is an estimate to plan the day around. The label on your tin always has the final word.

YOU ENTER THE TIN, NOT A DATABASE
There is no built-in product list. You read the recoat time off the tin in your hand and type it in — so RecoatWindow
works with any brand, emulsion or gloss, whatever the merchant sold you this morning. Save it once with a name and
it is one tap next time. No stale manufacturer data, no figure that is wrong for your product.

IT ALWAYS SHOWS THE MATHS
Every estimate opens up:
4h on the tin -> 18C band (x1.0-1.3), RH 72% band (x1.3-2.0) -> 5h12m - 8h36m
You can see exactly which band you landed in and how far the room is from the 21C / 50% baseline.
No black box, no mystery multiplier.

EVERY SURFACE GETS ITS OWN CLOCK
The landing wall, the front door, the skirting boards — each runs its own timer, side by side, from the moment you
tap "just painted". The list tells you at a glance how many are ready now and how many are still waiting.

ON YOUR LOCK SCREEN
A Live Activity counts the wait down without unlocking your phone. The bar turns green the moment a surface enters
its window, and there is a button right there to log the next coat — which immediately starts the timer for the one
after that. In the Dynamic Island you see whichever surface is closest to ready.

IT WILL TELL YOU NOT TO PAINT
Two conditions are not a matter of waiting a bit longer:
Below 10C — the film does not form properly. RecoatWindow shows no figure at all and says do not recoat.
Hot and very dry — drying too quickly is not good news. You get a warning that the surface may skin over before it
levels out, leaving brush marks, rather than a cheerful "ready early".

INDOORS BY DEFAULT
Most decorating happens indoors, where the weather outside is beside the point — so indoor mode is the default and
you set temperature and humidity by hand, starting from the 21C / 50% baseline. Switch to outdoor mode and current
conditions are fetched for your location, still adjustable by hand, with one tap to snap back to live values.
In indoor mode the app makes no network requests at all.

ALSO INSIDE
Home Screen widgets — the next surface to come due, or your top three at a glance
Optional alerts when a surface enters its window, and a heads-up when it drops below 10C
Coat history per surface (first coat 14:20, second coat 19:40), plus a note and a photo
Celsius or Fahrenheit
A plain-English page explaining every band the app uses and where the guidance comes from

PRIVACY AND PRICE
One purchase, everything included. No subscription, no adverts, no accounts. Your surfaces and products stay on your
device. In outdoor mode a rounded coordinate is sent to fetch the weather and nothing else — no tracking, no analytics.

RecoatWindow gives you a guide to plan around, not a guarantee about your finish. Conditions vary, surfaces vary,
products vary. Always follow the instructions on your tin.