HarmonyOS 6.1 Liquid Glass: Designing the Mate 90 UI

Software launches usually trail hardware launches. With the Mate 90, HarmonyOS 6.1 arrives at the same time as the device, and the system itself is the story. The headline change is a new design language Huawei calls liquid glass— configurable translucent surfaces, depth that responds to motion, widgets that feel suspended above the wallpaper instead of pasted onto it.

What "liquid glass" actually is

Liquid glass is less a visual style than a system of materials. Every surface in HarmonyOS 6.1 — widgets, notification cards, modal sheets, the lock screen — is built from a stack of layers with declared properties: blur radius, saturation, tint, depth from background, optional refraction. Designers tune those properties; the OS renders them consistently across phones, tablets, watches, and in‑car displays.

Because the material is described declaratively, third‑party apps inherit it automatically. An older HarmonyOS app gains the new look the moment users update — no rebuild required for the basics.

How it behaves on the Mate 90

Depth and parallax

The Mate 90's dual-layer OLED rumours pair beautifully with liquid glass. Widgets sit at distinct z‑depths, and the panel's contrast lets the blur look genuinely recessed rather than merely Photoshopped. Tilting the device shifts the wallpaper behind the widgets a few degrees — subtle, but enough to sell the material as physical.

Motion

Animations are spring-based by default. Cards expand from their tapped position; sheets slide up with a slight ease-back. The Kirin's extra AI headroom (covered in our logic-fold deep dive) lets the system predict touch trajectories and start the animation a frame early. The result feels closer to native iOS than to anything previously running on Android or HarmonyOS NEXT.

Configurable intensity

Users can dial the blur strength globally — from a near-opaque "compact" mode that prioritises battery and clarity, to a maximal "ambient" mode where the OS leans into the effect. Battery impact is real but small; the Kirin's GPU handles the blur passes efficiently enough that even the maximum setting holds 60 fps in everyday use.

Widgets, reimagined

HarmonyOS 6.1 widgets are no longer just static info cards. They are live surfaces with their own state and interactivity:

• Music widget: scrub the timeline directly, change tracks, swap output device — without entering the app.
• Weather widget: pinch to expand from current temperature into a full hourly forecast.
• Translate widget: tap to speak; transcription appears in the widget itself, on-device.
• Smart home widget: shows live device states with the new depth treatment, so an "off" lamp visibly recesses behind glass.

The old home screen was a launcher. The HarmonyOS 6.1 home screen is a dashboard.

What this means for the rest of the Harmony ecosystem

Huawei's pitch for Harmony has always been multi‑device — phones, tablets, watches, cars, smart home. Liquid glass is the first design system explicitly built to feel coherent across all of those form factors. A widget on the Mate 90 looks at home on a MatePad and recognisable on a HarmonyOS car cluster. That coherence is the long-game competitive advantage.

What to watch after launch

• Third‑party adoption: how quickly major apps embrace the new material toolkit.
• Battery numbers: sustained drain at maximum blur intensity over real-world days.
• Cross-device parity: whether tablets and watches feel like the same system or close cousins.