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Where rare ideasgo live.

QI SI is a product studio in Taipei. We design and build mobile apps, websites and SaaS products for clients, and we’re responsible for them from the first sketch to the live release and after. AI is built into how we work, so we move fast. Our standards keep what we ship solid.

Start a project See our work

Selected work

Live on the App Store and Google Play

FreshToGo 鮮款款

An app that helps people walk into the good shop they pass every day. We built every part of it: the iOS and Android app, the backend, the admin dashboard and the website.

  • Consumer and merchant app
  • Backend
  • Admin dashboard
  • Marketing website
Read the case study

Real FreshToGo screens; shops and prices are sample data.

How we work

One deep, one bright.

In our mark, the deep grain stands for reliable technology and the bright one for warm, energetic innovation. That’s how we work: AI gets us to new ideas fast, and the engineering underneath is ours to answer for. You need both.

Fast

Where AI speeds us up

  • Exploring directions and prototypes early
  • Drafting and scaffolding code
  • Writing tests and widening their coverage
  • Reviewing changes for what people miss
  • Keeping documentation current

Solid

What stays with us

  • Deciding what’s worth building
  • Architecture, and the trade-offs behind it
  • Every interaction and every detail of the interface
  • Reviewing every line before it ships
  • The call on when it’s ready

What we take responsibility for

  1. The problem

    We work out what needs to exist, and why, before anyone opens an editor.

  2. The experience

    Flows, states, edge cases, empty screens and error messages, all designed on purpose.

  3. The engineering

    An architecture that fits, code that’s tested and reviewed, and a stack chosen for this product.

  4. The launch

    Store releases, servers, the unglamorous last mile. It isn’t finished until it’s live.

  5. The handover

    Readable code and clear documentation, so whoever maintains it next can keep going.

Services

Whatever the problem calls for.

We’re technology-agnostic. We choose the stack after we understand the problem, never before.

No house stack. The right one is an answer, not a starting point.

  • Mobile apps

    iOS and Android, from the first store release through every update after it.

  • Websites

    Marketing sites and web apps that load fast, read well and are easy to change.

  • SaaS products

    Subscription software with the accounts, roles and admin tools a working business needs.

  • Internal tools

    Dashboards and back-office systems that keep an operation running.

  • Backends & APIs

    The services, data and integrations everything else depends on.

  • Something else

    If it’s software and it has to work, tell us about it.

Have something that needs to go live?

Tell us what you’re building, where it stands today, and what “done” looks like to you. We’ll take it from there.

support@handyla.co
Studio 1F., No. 39, Sec. 2, Kaifeng St., Wanhua Dist., Taipei City 108, Taiwan