Amplii: Binaural Beats

Amplii (formerly Signal) generates binaural beats: two slightly different tones, one to each ear. Your brain constructs a third, pulsing tone from the difference between them. Headphones are required. On speakers the two tones mix before they reach you and the effect disappears, so Amplii checks for headphones before you begin. THE ARC Most binaural apps hand you one fixed frequency. Amplii moves. Every session eases in from where it starts, holds at a target, then travels to a third stop before fading out. Meditate descends from 10 Hz into a 6 Hz theta hold, then lifts to 12 Hz, so you finish calm but awake. Focus rises from 10 Hz into a 14 Hz beta hold, then eases back to 10 Hz. Energy climbs from 12 Hz to an 18 Hz hold, then settles at 14 Hz. Sleep is the exception: it sinks from 8 Hz to 2.5 Hz and keeps sinking, because a sleep session shouldn't lift you back toward waking. You can watch it move. Before a session starts, Amplii shows you the arc ahead. During the session, a point of light travels along it from start to return. FOUR MODES, ALL FREE Each has a default length, adjustable anywhere from five minutes to two hours: Meditate · theta · 25 min Focus · beta · 45 min Energy · beta · 15 min Sleep · delta · 60 min Also free: a pink noise bed you can switch on under any session to soften the edge of a pure tone. And you can open the arc at any time to see the exact shape of a session, where it starts, holds and returns and how long each part takes, whether or not you've unlocked the controls. BUILT FOR REAL LIFE If an alarm goes off or a call comes in, your session pauses and picks up exactly where it stopped. Take your headphones out and it pauses rather than playing through the speaker. WHAT ONE PURCHASE UNLOCKS The free modes run on presets. Amplii Full unlocks the instrument underneath them: • Full arc control: set your own start, hold and return frequencies, anywhere from 1 to 20 Hz • Ramp timing: decide how long the beat takes to reach its target, and how long it takes to come back, independently • Ear assignment: choose which ear carries the lower tone • Tone pitch: tune the underlying tone itself, from 80 to 400 Hz, not just the beat It's the same engine that builds all four free modes, opened up for you to shape. One payment. No subscription, no renewal. The unlock is tied to your Apple Account, so it restores if you delete the app, reinstall it or move to a new phone. NOTHING IS RECORDED No account. No sign-in. No analytics. No network calls except Apple's purchase check. Your modes and settings stay on your device and are deleted with the app. No streaks. No scores. No notifications asking where you've been. HONEST ABOUT THE RESEARCH The research on binaural beats is real but mixed, and effects vary between people. Amplii is a meditation and wellness tool, not a medical device, and isn't intended to diagnose, treat or cure anything. If you have a medical condition, including epilepsy or a heart condition, or you're pregnant, talk to a doctor first. Don't use it while driving.