Fosfor
fosfor.club
Enter the same 1–3 character key as your friends. Every phone generates the same high-contrast two-colour pattern and transition style for the current 24-hour window.
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Type a code
Type 1–3 characters to browse signals. Every valid code shown here is the exact pattern your friends will see.
Tip: browse until you see a pattern you like, then share that 1–3 character code. Turn your screen brightness up before holding your phone above the crowd.