Ru:White noise & Sleeping well

Thetis app

About this app

Ru is a white noise app thoughtfully designed for the most realistic scenarios: in a dark room, when you're half-asleep, or while you're soothing your little one in the crib.

Why choose Ru?

🌙 Night‑friendly interface: The entire UI has reduced brightness, with no pure white colors, to minimize eye strain and keep your bedroom from lighting up.

☝️ Easy "blind" controls: Sound sliders are designed with large strips, so you can easily adjust them with just one hand without having to stare at the screen.

👶 Baby Mode: Ru's most thoughtful feature. When enabled, the app automatically limits volume to a safe level for your baby's hearing and provides distance warnings for proper device placement.

🎛️ Versatile sound mixing: Create your own custom mix from technical noises (White, Pink, Brown) combined with nature sounds (Rain, Stream) and relaxing Train sounds.

🔋 Battery & performance optimized: Ru is built to run smoothly through 8 full hours of the night without overheating or draining your battery abruptly.

⏱️ Smart timer: Set an auto‑off timer (30m, 1h, 4h, 8h) so the app stays with you until you've drifted into deep sleep.

What’s new

Auto‑soothe baby: AI‑powered cry detection that automatically turns the sound back on to comfort your baby back to sleep.

Age‑based settings: 3 sound modes tailored for Newborns, Infants, and Toddlers.

Sleep log: Detailed statistics on how many times your baby fusses and how long the app has been active.

Night mode: Ultra‑dim screen and safe‑distance alerts to protect your little one.

Absolute privacy: All data processing is done 100% on‑device—no recording or uploading to the cloud.