Fururi: Baby Sensory Play

A new world: In the Night. Small lights drift on the wind across a dark screen; touch, and one swells. Available to everyone. Six worlds in all.

Touch anywhere and the water stirs, ripples spread, and a clear tone sounds. Slide a finger and bubbles drift. Press with a whole hand and the water itself shakes.

One screen. No menus, no navigation. Open it and you are already underwater.

■ Sound, touch and light answer together

A ripple spreads from where you touched, a clear tone sounds, and at the same moment a vibration returns to your finger. The three never drift apart.

The tones sit where infant hearing is most sensitive — low notes reach them poorly. Only consonant intervals are used.

■ It adapts to your child's age

Three stages: under 1, ages 1–2, and 3 and up. Color, speed, the number of bubbles, and the strength of sound and vibration all change. Entering a birth month is optional.

Shake play is never offered to children under one.

Each session has a set length. When the time is up, the screen slowly darkens and play ends quietly. It never stops abruptly.

■ No advertising at all

No banners, no video ads, no outbound links. Nothing to tap by accident.

No analytics either. The birth month and play records stay on the device and are never sent anywhere.

■ Play records

Time played, and the first time each new thing happened — the first touch, the first time your child answered with their voice.

No goals, no streaks, no celebrations. A record should be something you are glad to look back on, not something that asks anything of you.

■ Play with Movement (one-time purchase)

Tilt the device and the water tilts, sending bubbles drifting. Shake it and motes of light rise up. Make a sound and the water answers — so children who cannot reach the screen yet can play too.

A one-time purchase with no further charges. Play records, session length and effect strength can be used without buying anything.

■ Worlds

The same touch, with the look, the sound and the haptics changed completely. Your age setting carries over into every world.

• In the Water: Bubbles rise from below, and ripples spread where you touch.
• In the Night: Little lights drift on the wind, and a light swells where you touch. The screen stays almost black, and a far-off wind keeps sounding even when no one is touching. This world does not respond to voice.

These two are available to everyone.

• In the Snow: Snow falls at a slant, and frost branches out where you touch.
• In the Light: Light rises and opens, and scatters upward where you touch.
• Among the Stars: Lights drift without direction, and an aurora runs where you trace.
• Among the Flowers: Petals drift down, and a rose opens where you touch.

Each of these four can be added as a one-time purchase. Buying a world does not unlock tilt, shake or voice play - that is Play with Movement.

■ For parents

Settings live behind a long press in the top-left corner followed by a simple arithmetic question, so a child cannot open them by chance.

Used together with Guided Access on iPhone and iPad, the Home gesture can be blocked. The app explains how to start and, more importantly, how to end it.