This small app is useful for Brain Waves and Binaural beats therapy often called Brainwave Entrainment.
Just as we can record the activity of the heart with ECG the same way our brain neurons also interact with others and their activity can be recorded with EEG.

The right state of mind and brain waves is important to have a healthy and quality life.

There are five states of consciousness in which our brain can be.-
1)Delta - 0.5Hz–4Hz - When you are in deep sleep and body is healing.
2)Theta - 4Hz–8Hz - The state just before sleep - (sleepiness)
3)Alpha - 8Hz–14Hz - When you are relaxed but aware and alert also
4)Beta - 14Hz–30Hz- When you do your daily activities you are alert and focussed about your activity.
5)Gamma 30 - 80 Hz - Higher-Order Information processing and cognitive learning.

How App Can Help You?

Any improper balance in the above states leads to problems and disorders in our life.

Let's say your brain waves are more persistent in beta than alpha state then you will be anxious and in stress mode.
Let's say your delta waves are not in good range then you may not be falling in deep sleep and suffering from sleep disorders.
A night of good sleep leads to overall healing and a good heart plus a good state of mind.
You can use any sleep tracker app to find out if you got the benefits of using delta binaural beats after using this app.

Suppose you have issues learning a new skill or you feel you are less creative you can use alpha brain waves.

If you are doing studies and feeling sleeping then you may use beta waves session to be in a focussed state instead some energy drink to instantly boost you up.

With this app you can train your brain with brain wave therapy to be in the state you desire gradually with patience and persistence.
It can be used with a daily routine such as a session before sleeping in the delta wave.
Or theta/alpha for relaxation or meditation purpose(after coming from the office or when you just want to relax).

Benefits Of Binaural Beats Based Music in the respective brain wave range
-
Delta- Deep Sleep | Heal | Pain Relief | Restore Health
Theta- Deep Meditation | Inspired | Intuition
Alpha- Relax Light Meditation / Creativity | Happiness | Mood Improve | Reduce Stress
Beta - Active | Focuueses | Energy | Concentration | Alertness
Gamma- Higher-Order Information Processing | Cognitive Learning

Salient Features
1)It is all offline and free.
2)It includes a Binaural wave generator that can be used to generate any beat with choosing carrier frequency in the range of 10-1000hz. (For example carrier of - 432 Hz )
3)pre-selective presets for different brainwaves in 5 states.
4)Musical tracks for delta alpha theta and beta brain wave if you don't like pure tones.
5)You can also Experiment with presets and save presets which brings the best benefit to you.

Precautions
1)Please use headphones for the best experience.
2)Check headphones volume before use.
3)At least give a week or two to notice a change in your lifestyle habits and behavior.
4)Please don't use it when doing some extensive focussed work. Use it when relaxed and calm.
5)Recommended - Keep your sessions for at least 15-20 minutes and less than 30 minutes.