Case Study

Breath Player Mindful Music

Turning mindful breathing into beautiful sound and music for meditation, relaxation, and focus.
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Breath Player is a breathing, relaxation, and mindful meditation app with a large catalog of professionally composed sonic experiences. Experiences range from musical compositions to nature sounds and machine noises to binaural beats.

The Need

Rather than directing your breathing like a typical meditation app, Breath Player aimed to create a mindful breathing tool which followed the natural cadence of your own breathing to immerse you in the moment.

The app needed to track breaths in and out, and make beautiful sound and music that swells smoothly along with your breathing–essentially turning your breath into an instrument.

  • Many dynamic "experiences" with different sounds and music would need to be offered
  • Multiple input methods for users to easily track their breaths in and out would be required
  • We'd need to visualize the user's breaths in and out in a way that felt organic, without lag or stutter
  • Breath inputs would need to adjust the mix of audio in real time, enhancing the effect that the user's breath itself was creating the sound and music
  • Desire to help users create a healthy habit of regular mindful breathing, thereby increasing "stickiness" of the app
Our Solution

We created an app with a dynamic library of sounds and music, called "experiences," so that there is truly an experience for anyone. The library can be organized and expanded from a central real-time web database, powered by Google's Firebase.

Because each Breath Player experience works with high quality audio files, we knew we didn't want to incur substantial bandwidth costs by streaming the audio each time. We also wanted to make the app quick to download and begin using, which meant limiting the download size by including only free experiences available to all users within the initial download.

We then built the app around a native audio engine for offline-first functionality. Once users select experiences they are interested in, the relevant audio downloads to the device one time, and can continue to be used whether the device remains connected to the internet or not.

As Natural As Breathing

We created three input methods to allow users to input their breaths and control the audio experience in the way that felt most natural to them. Two of these input methods are visual and respond to touching or sliding a breath visualization officially known as "Io," (but we affectionately call it Blob Marley).

Io is a gently animated button with organic moving edges which grow as you breath in, and shrink as you breath out–closely following the physical sensation of filling up and emptying your lungs.

As we were building, we found that the CPU would become overloaded while trying to manage both the real-time changes to the audio mix and the real-time visualization with Io. This resulted in lags, stutters, and frame drops that detracted from the experience by making it feel unnatural and inorganic.

Moving Io's animations off of the CPU and onto the GPU made effective use of the hardware resources, allowing the Breath Player experience to feel great–even on older and less powerful devices.

The third input mechanism uses yet more device hardware capabilities to follow the user's breath automatically by tracking movement on the user's belly. This mode involves placing the phone on your lap and gently pressing the screen against your belly as you breathe.

We used the ambient light sensor to detect when the screen was pressed against your belly to both disable the screen (preventing errant taps) and to begin the experience. Accelerometers track the orientation of the device and control the experience as you breath in and out.

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