# Amplii: Binaural Beats — Focus, sleep & meditation arcs

> Binaural beats generator with dynamic frequency arcs for focus, sleep, and meditation. (iPhone/iPad app by Amplification Institute Inc..)

- Source: https://appshunter.io/ios/app/amplii-binaural-beats/id6811405143 (this page in markdown: same URL + `.md`)
- Developer: [Amplification Institute Inc.](https://appshunter.io/developer/6811405145)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases (on sale, was $9.99)
- Rating: 5.00/5 from 3 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2026-09-16
- Data updated: 2026-10-26
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/amplii-binaural-beats/id6811405143/reviews.md

## What is Amplii?

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.

## Key features

- Dynamic frequency arcs
- Adjustable session lengths
- Pink noise option
- Automatic session pausing
- Full arc control unlock
- Customizable ramp timing
- Ear assignment control

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Signal Full | $9.99 | one-time |


## Is Amplii safe?

Not enough ratings yet to assess Amplii.

## Is Amplii legit?

Amplii: Binaural Beats has limited verification signals. The AppsHunter Legitimacy Score for Amplii is 58 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/amplii-binaural-beats/id6811405143/reviews.md

### 5/5 — So Relaxing

*2026-09-25*

It’s easy to use and relaxing. I like that you can set the length of the session

### 5/5 — So relaxing!

*2026-09-22*

Super simple to use and does exactly what it says. A+

## Frequently asked questions about Amplii

### What is Amplii?

Amplii generates binaural beats, which are auditory illusions created by playing two slightly different frequencies, one to each ear. This is designed to influence brainwave activity for states like focus, meditation, or sleep. The app features dynamic 'arcs' that shift frequencies over time.

### Does Amplii require headphones?

Yes, headphones are required for Amplii to function correctly. The binaural beat effect relies on the two distinct tones reaching each ear separately. The app checks for headphone connection before starting a session.

### What are the free modes in Amplii?

Amplii offers four free modes: Meditate, Focus, Energy, and Sleep. Each mode has a default length but can be adjusted from five minutes to two hours. A pink noise bed can also be switched on under any session.

### What does the one-time purchase in Amplii unlock?

The single purchase unlocks full control over the binaural beat arcs. This includes setting custom start, hold, and return frequencies, adjusting ramp timing, assigning ear tones, and tuning the underlying tone pitch.

### Is Amplii a subscription app?

No, Amplii is not a subscription app. The unlock is a one-time purchase that is tied to your Apple Account and will restore if you delete and reinstall the app or switch to a new phone.

### Does Amplii collect user data?

No, Amplii is designed with privacy in mind. It does not require an account, sign-in, or collect analytics. Your modes and settings remain on your device and are deleted with the app.

### How often is Amplii updated?

The latest version of Amplii is 2.0, which was last updated on October 23, 2026. While specific update frequency isn't detailed, the app has seen recent updates.

### Is Amplii suitable for all ages?

Amplii has an age rating of 4+, making it suitable for a wide range of users. However, it is important to note that it is a wellness tool and not a medical device.

## Version history (last 3 releases)

### 2.0 — 2026-10-23

Signal is now Amplii. A new look, the same sound.
• A redesigned app with calm, moving waves
• See each session’s arc before you begin
• An alarm or call now pauses your session, and Play picks up right where it stopped
• A clearer heads-up when headphones aren’t connected
Still no account, no tracking. Nothing leaves your phone.

### 1.1 — 2026-09-22

The arc now moves at a pace that suits each mode.

Sleep descends slowly — twelve minutes to settle, because the point is to be asleep before it finishes — and barely climbs back at the end. Energy gets going in ninety seconds. Focus reaches working frequency quickly, then lets you down gently.

Previously every session ramped for a quarter of its length, whatever that length was, so an hour-long session spent thirty minutes traveling and only half of it at the frequency you chose.

You can now set both ramp lengths yourself, independently, for each mode.

The arc and the ear settings also open for everyone now. You'll see the full shape of your session and exactly how long each phase takes, whether or not you've unlocked the controls.

And the pink noise bed is free, as it was always meant to be — it had been sitting behind the purchase screen by mistake, where nobody could reach it.

### 1.0 — 2026-09-16

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-26.*