NeuralStack.io™: Focus & Sleep
Brainwave: Binaural & Monaural
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Focus, Relax, Meditate & Sleep with Customizable Multi-Stage Brainwave Entrainment, Breathing & Ambience — Binaural, Monaural, Isochronic & Binaural + Isochronic tones
Build, remix, and shape your mindset with customizable Brainwave Entrainment Stacks. Start with the included Explore Stacks, or create your own by combining multi-stage brainwave entrainment, guided breathing, and background audio elements into an integrated Stack. NeuralStack.io is designed for people who want more than pre-mixed audio tracks. Instead of locking you into pre-made sessions, NeuralStack.io gives you flexible tools to create and refine Stacks composed of multi-stage elements—so you can shape your ideal mindset for any situation.
Create and Customize Stacks
* A Stack is a composition of elements including Brainwave Entrainment, Guided Breathing, Sine Waves, Ambience, Nature Sounds, Personal Audio Files, and Noise.
* Remix the included Explore Stacks or create your own.
* Add/remove elements, adjust duration, and fine-tune structure.
Guided Breathing, Integrated
* Remix the included breathing programs to match your pace.
* Create custom multi-stage breathing programs with adjustable tempo and visuals.
* Customize breathing guidance phrases to include personal mantras or affirmations.
* Supports fractional breathing patterns, such as Coherent 5.5 second cycles.
Listen alongside other apps:
* Listen while playing audio or video from other apps.
* Set your preference for allowing other apps at the app-level or the stack-level.
Listen Offline:
* Audio resources are synchronized to the device instead of being streamed, eliminating network traffic, and allowing you to listen offline.
Create custom tone programs for your Stack
* Add or remove stages, fine-tune stage durations.
* Create multi-stage entrainment programs using beat frequencies from 0.5–100 Hz.
* Specify fractional frequencies with 2-decimal precision.
* Choose carrier frequencies from 100–1000 Hz with automatic power equalization.
* Choose from 4 different Tone Modes to listen in Binaural, Monaural, Isochronic, or phase-synchronized Binaural + Isochronic modes.
Advanced Global Settings
* Use the app's Global Settings to modify tone characteristics, such as cycles-per-pulse and gain to sharpen or soften isochronic and monaural modulation.
Stack Playlists
* Organize your creations into playlists to support your daily routine.
* Create sequences of Stacks that use different Tone Modes.
Ambience and Nature
* Layer dynamic ambience and nature sounds.
* Remix programs, combining them to create multi-stage ambient and nature programs, and reuse them across different Stacks.
Solfeggio and Schumann Frequencies
* Includes single and multi-stage entrainment programs utilizing Solfeggio carrier frequencies and Schumann resonant beat frequencies to be remixed and customized.
Noise
* Layer a noise element into your stack for sound masking.
Pure Sine Waves
* Create pure sine waves from 100 to 1000 Hz with power equalization and 2-decimal precision.
* Includes Solfeggio programs.
Custom Audio Programs
* Integrate personal audio files into your Stacks.
* Note: This feature is only intended for personal audio files, such as those recorded with voice recording apps, and cannot access copy-protected audio or streaming audio.
Subscription Required
NeuralStack.io offers a free trial. Continued access to all features and content requires an auto-renewing subscription. Subscription options: $2.99/month or $24.99/year. These prices are for the United States, pricing in other countries may vary. Subscription will automatically renew unless turned off at least 24 hours before the current period ends. You can go to your App Store Account settings to manage your subscription and turn off auto-renew. Your App Store Account will be charged when the purchase is confirmed. If you subscribe before your free trial ends, the rest of your free trial period will be forfeited as soon as your purchase is confirmed.
Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy
https://neuralstack.io/#privacy
This update adds new multi-stage brainwave entrainment ladder programs and stacks targeting 40 Hz Gamma (Heightened Focus), 25 Hz Beta (Concentration & Learning), 10 Hz Alpha (Calm & Relaxation), 6 Hz Theta (Creative Thinking), 4 Hz Theta (Meditation), and 1 Hz Delta (Deep Sleep). Multi-stage ladder sequences draw auditory attention (sound prioritization) to the target beat frequency by varying the carrier frequency used for each stage, while keeping the beat frequency constant.
Thank you for supporting NeuralStack.io, the only brainwave entrainment app featuring binaural, monaural, isochronic, and synchronized binaural and isochronic tones.
How the 4 methods of Brainwave Entrainment in NeuralStack.io work:
Brainwave entrainment has been shown to be effective for improving focus, relaxation, meditation, and sleep in hundreds of studies. It’s used by individuals to manage stress and improve cognition, and in clinical settings to calm anxiety, improve memory, and to relieve insomnia.
Brainwave entrainment relies on the brain’s Frequency Following Response (FFR), where the brain naturally aligns its electrical impulses (brainwaves) to match the rhythm of an external stimulus within a few minutes of listening. This app provides 4 types of audio brainwave entrainment.
Binaural Beats:
Binaural beats occur when two slightly different frequencies are presented separately to each ear using headphones or earbuds (one frequency to the left ear, a different frequency to the right ear), where the difference between the two frequencies matches the target brainwave frequency. For example, if a 200 Hz tone is played in your left ear and a 240 Hz tone in your right ear, your brain's directional hearing system perceives an inaudible rhythmic beat at 40 Hz—the difference between the two frequencies.
Monaural Beats:
Monaural beats are created when two frequencies are combined before reaching your ears, creating an audible rhythmic pulse, and the combined sound is played into both ears. Monaural beats do not require headphones and can be listened to over speakers. Unlike binaural beats, they are suitable for people who have hearing loss in one ear.
Isochronic Beats:
Isochronic tones are single tones that pulse on and off at regular intervals. For example, a 400 Hz tone would pulse 40 times per second to create a 40 Hz rhythm. Like monaural beats, they do not require headphones and can be listened to over a speaker.
The regular on-off pattern creates sharp, well-defined pulses that are easy for the brain to track. The clarity of these pulses may make them more noticeable than subtle beat patterns. They are particularly effective for higher brainwave frequencies in the gamma range associated with focus and concentration. Because they are a sharp, distinct pulse they may not be as calming for relaxation and meditation as the smoother pulses of monaural beats. Monaural beats are more like hills, while isochronic beats are more like sharp peaks.
Binaural + Isochronic Beats:
When precisely phase-synchronized, binaural beats can be combined with isochronic tones to leverage both neural processing pathways. In this approach, binaural beats provide the subtle, centrally-processed frequency difference while isochronic pulses add a clear, rhythmic structure.
This combination delivers frequency information through both the superior olivary complex (binaural processing) and the cochlear pathway (isochronic processing).
Studies have shown that this combination is more effective than binaural beats or isochronic beats alone. The combination of the clearly audible isochronic beat also reinforces the perception of the binaural beat, which is helpful at higher frequencies where binaural perception begins to weaken.
Links to Research:
https://neuralstack.io/brainwave-entrainment-research.html
About Brainwave Entrainment:
https://neuralstack.io/brainwave-entrainment.html
The developer, Banzai Labs, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Banzai Labs Inc.
- Size
- 186.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- NeuralStack.io Monthly Subscription $2.99
- NeuralStack.io Annual Subscription $24.99
- Copyright
- © 2026 Banzai Lab Inc.
