ClassTimr - Classroom Countdown Timer
15:00
Timer
Stopwatch
Clock
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1 Min
5 Min
10 Min
15 Min
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Background music
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🎵 LoFi
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Visual theme
🌌 Space Explorer
🌊 Deep Ocean
🟩 Cyber Matrix
🪼 Glowing Tide
🌊 Kelp Forest
🧬 Double Helix
💮 Tranquil Koi
🧲 Magnetic Flux
🕸️ Neural Network
⚡ Hadron Collider
⚛️ Quantum Realm
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