Mar de Tranquilidad, an Apple TV meditation app

A sea that breathes with you

Most meditation apps are a voice over a pretty background. This one has no voice: the landscape fills the screen and moves at a breathing pace. Nothing is recorded: code draws the sea and generates the sound in real time. On the App Store it is called Sea of Tranquility.

What it does on the TV

Pick the mode, the length, the place and the time of day, and press Start. Everything works with the Apple TV remote.

• Breathe: sessions of 1, 3, 5 or 10 minutes, or endless, with five rhythms (Gentle 3·5·1, Calm 4·6·1, Coherent 5·5, Box 4·4·4·4 and 4-7-8).
• Sail: no guide, just watch. A boat moves slowly across the sea, from 3 to 20 minutes or endless.
• Sleep: choose 15, 30, 45 or 60 minutes; the waves calm down and at the end image and sound fade out together.
• Explore and Adventure: wander from place to place, or sail with encounters in the distance.

Six places in three worlds

The open sea and the beach on Earth; Acidalia Planitia, the North Pole and Jezero crater on Mars; and the rings of Saturn. Each with its own ground, sky, times of day and sound. The moon over the sea is tonight's moon.

Free and Pro

It is a free download with the open sea and the beach, and Breathe, Sail, Sleep and Explore with no time limit. Pro is a one-time purchase, not a subscription: it adds Mars, Saturn and more times of day and weather at sea, and you can try each place for a minute before buying. The same purchase works on Apple TV, iPhone, iPad and Mac.

How to install it on Apple TV

You download it from the TV, not from your phone or computer: on the Apple TV, open the App Store, search for "Mar de Tranquilidad" (its original name) and select Get.

It is also on the App Store for iPhone, iPad and Mac, on Google Play for Android and on the web. No accounts, works offline. It is a tool to slow your breathing: not a medical treatment and no replacement for a professional.