Party Lights: Sync Phones

A party lights app that turns every phone in the room into one light show, all changing at the same moment.

One phone hosts. Friends tap Join and pick the room, or scan its QR code with their camera and join in a web browser. Each phone keeps its clock in step with the host and works out the colours itself, so the whole room changes together, and a short Wi-Fi drop does not stop the show.

Features
- Host on one phone; guests join from the app or any phone's web browser
- Rooms on your Wi-Fi show up by themselves, or use the QR code or room code
- Every phone shows how closely it is in time with the host
- Set the tempo with a slider, or tap along to the music
- Screens stay on and bright during the show, and Lights only hides the controls
- Works on your own Wi-Fi or the host's hotspot; nothing goes through the internet
- Soft Wash, Beat Pulse and Warm Glow free

Pro
A one-time Pro unlock on the host phone adds:
- Room effects: Wave, Chase, Rainbow Spread and Team Colours, using each phone's place in the line
- Colour Scenes (Midnight Party, Sunset Club and Ice Rave) and your own colours
- Cool Aurora, Calm Ocean and Candle Glow
- Neon Strobe, and Mic Reactive, which listens on the host phone and never records or sends sound
- Messages on every phone: big, or one letter per phone
- Countdowns for New Year or birthdays, ending on your message
- Sleep timer and saved shows
Guests never need to pay.

Good to know
All phones need to be on the same Wi-Fi network or the host's hotspot. Before any lights start, every phone must accept a photosensitivity warning, including guests in a web browser. Neon Strobe, Chase and Mic Reactive ask again each time. No effect flashes 3 or more times a second. Take care if you are sensitive to flashing light. For the steadiest show, guests should use the app, as some browsers let the screen go to sleep.

Pricing
Free: 3 effects, tempo and joining by app or browser. Party Lights Pro is a one-time lifetime unlock. No subscription.

Recent changes:
Fixes the Pro unlock store connection.