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Matthias Brandolin · Mobile development enthusiast

Mobile apps that feel alive.

Bring your cursor close to the orb, or click it.

I design and build apps where every swipe, tap and transition feels natural, and I share the motion work behind them as free, open-source tools.

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GesturesSpringsShadersTransitionsHaptics

Selected work · 04

Things I've built for people.

Products of my own and the open-source work around them: what each one is for, and who it helps.

  1. 01 / 04Mobile app · iOS & Android2026
    Arcalis app icon

    Arcalis

    Every expense in one feed, without typing a single one.

    Built for

    Freelancers preparing for tax season, digital nomads spending in several currencies, and anyone who just wants to see where their money goes.

    arcalis.net(opens in a new tab)
    150+currencies, one total

    What it does

    Snap a receipt, forward an email or drop in a bank statement. Arcalis reads it, sorts it into the right category and converts it to your home currency. You never have to connect your bank account.

    You can also just ask questions about your own spending, like “How much VAT have I paid this quarter?” or “Did I spend more on groceries this month?”, and get a straight answer.

    • Scan, forward or import
    • Sorts itself into categories
    • Ask questions in plain language
    • Budgets and renewal reminders
  2. 02 / 043D engine for mobile apps2026

    Apricot

    Real 3D in everyday apps, as easy as adding a button.

    Built for

    App makers who want moments people remember, like a product you can spin, a card that catches the light or a car you can open, without becoming 3D experts.

    Coming soon
    3Dinside everyday app screens

    What it does

    Apricot puts living 3D scenes inside ordinary app screens: coins that stack and spin under your finger, fruit that tumbles down and piles up, a toy car you drive around, a metal card in different finishes.

    Any model can be painted, opened part by part and turned with a finger, with studio lighting and soft shadows from the start. Hundreds of copies of the same thing, like seats in a cinema, stay smooth and can each be tapped.

    • Spin, tilt and drop objects over any screen
    • Open a model part by part
    • Studio lighting and soft shadows
    • Hundreds of tappable copies at once
  3. 03 / 04Open-source library2026

    Native Springs Shaders

    Light, fire and liquid for the screens in your pocket.

    Built for

    App teams who want a moment of delight, like a celebration, a premium touch or an assistant that visibly listens, without building visual effects from scratch.

    View on GitHub(opens in a new tab)120+ stars on GitHub
    13ready-made effects

    What it does

    A free collection of animated effects that stay smooth on everyday phones: northern-light auroras, fireworks, rising sparks, soft drifting clouds, and neon and liquid-metal borders.

    Some effects react to touch, like water ripples and glitches. There is also a glowing orb that can show when an assistant is idle, listening or thinking. An example app lets anyone tune every effect live.

    • Auroras, fireworks and sparks
    • Neon and liquid-metal borders
    • Ripples that react to touch
    • An orb that shows when an assistant listens
  4. 04 / 04Open-source library2025

    Native Springs

    Fifteen interactions that make an app feel alive.

    Built for

    Developers and designers who want polished, physical-feeling motion in their apps and a solid place to start instead of a blank file.

    View on GitHub(opens in a new tab)170+ stars on GitHub
    15interactions to copy

    What it does

    Carousels that breathe as you swipe, content revealed under your finger, water-like ripples, a button that melts into a panel, and a slider you swipe to confirm.

    Each piece stands on its own. You can copy it into your app and make it yours, and the collection keeps growing as new experiments land.

    • Carousels that breathe
    • Reveals under your finger
    • Swipe-to-confirm and pull-to-refresh
    • A playful thermal camera

About

I’m Matthias, a React Native developer. I care about the part of an app you feel: how a card settles, how a button gives under your thumb, how one screen hands off to the next.

I build products of my own, like Arcalis. The motion and visual effects I make along the way go out as free, open-source tools that other developers can drop into their own apps.

  1. 01

    Feel comes first

    Motion is how an app explains itself. I design gestures and transitions alongside the screens, not after them.

  2. 02

    Smooth on real phones

    An effect only counts if it holds up on the phone in your pocket, not just the newest one on the market.

  3. 03

    Build, then share

    What I learn shipping my own products goes back out as free, open-source pieces that anyone can use.

Contact

Let’s make your app move.

[email protected]