Phase4 Mobile creates innovative and elegant apps focused on improving quality of life.

Check out our popular free apps:

Rain Sounds HQ

Relax with over 75 high-quality rain sounds recorded in the world’s forests, countryside, and cities.

White Noise HQ

Transform your bedroom, hotel room or office with over 75 high-quality white noise sounds.

Soothing Sleep Sounds

Fall asleep fast to 125 high-quality sounds with this free version of our Sleep Sounds HQ app.


Help your baby sleep better than ever with over 50 high-quality natural sounds and a smart auto-shusher.

Tinnitus Aid

Relieve annoying tinnitus symptoms with high-quality natural sounds and advanced audio filters.

Sleep Science Alarm Clock

Wake up gently and understand your sleep with this free version of our premium Sleep Science HQ app.

Power Nap Tracker

Recharge with the perfect nap. Wake up at just the right moment so you feel fresh and rejuvenated all day.