Litwave vs Concert Lume

Turn any crowd into a synchronized light show — no Wi-Fi, no Bluetooth, no venue hardware. Litwave flashes your screen and flashlight together, in perfect sync with every other phone in the crowd. There's nothing to pair and nothing to configure: sync is based on the clock already in everyone's pocket. PERFECT FOR FLASH MOBS AND EVENTS Planning a surprise? Organizing a crowd moment? Litwave lets you choreograph a light show for any group — a birthday, a stadium, a street performance, a festival — with nothing more than a QR code and a shared moment. Create an event, set the time, and share the link. When the countdown hits zero, every phone flashes the same message in Morse code, in unison. FOR ORGANIZERS • Create named events with a scheduled start time • Share via QR code, link, or any messaging app • Recipients import in one tap — no account needed • Works for groups of 5 or 50,000 FOR PARTICIPANTS • Scan a QR code or open a link to join an event • Press start — your screen and flashlight begin flashing in sync • No pairing, no Wi-Fi needed, works in any venue HOW THE SYNC WORKS Every phone already shares the same atomic clock time. Litwave uses that clock to align all devices automatically — the same principle that keeps GPS satellites in sync. No coordination between phones is ever needed. CUSTOMIZE YOUR MESSAGE • Built-in presets for concerts, sports, and celebrations • Type any custom message — Morse code is generated automatically • Supports Latin, Cyrillic, German, Scandinavian, and more PRIVACY FIRST Litwave is fully offline. It collects no data, requires no account, and has no server. Everything stays on your device. Open source · Free · No ads · No tracking

Experience music with light. Concert Lume transforms your smartphone into a dynamic, glowing canvas of color. The colors change in time with the music at lightning speed, while the brightness intelligently adjusts to the volume. When the beats are loud, your display glows at full intensity; during quiet passages, it dims to create a moody atmosphere. With just a single device, you can create a truly special atmosphere at parties, concerts, or at home. When multiple people use Concert Lume at the same time, the app unleashes its true magic thanks to our perfected synchronization. The colors change on all smartphones in exact sync. This turns many displays into a breathtaking, collective light show that delivers the ultimate stadium experience. Whether at a concert, a festival, a party, or a cozy evening at home: Concert Lume is ready to use right away and intentionally easy to operate. Launch the app, set up your smartphone or hold it up, and enjoy the light show. Highlights: • NEW: Dynamic brightness. The display literally breathes in time with the song’s volume • Lightning-fast and atmospheric color changes that match the music • Perfectly synchronized light show across multiple devices simultaneously • Works with just a single smartphone • Ideal for concerts, festivals, and parties • Cozy ambient lighting for your home • No complicated setup required • Try it for free • Full version with full display area • One-time in-app purchase with no subscription In the free version, you can test the light show right away. After a brief full-screen preview, the app remains usable with a reduced color area. With the full version, you permanently unlock the entire display area.