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Frontend only: an app without a server

A calculator, a timer, a checklist for yourself: those need no server. Everything happens on your own device.

Updated 2026-08-08 · Mini tutorials
Frontend only: an app without a server · 0:49 Vertical version ↓

When you do not need a backend

As soon as something is just for you, on one device, and does not have to be shared, it can run entirely in your browser. Think of a pomodoro timer, a conversion tool, a shopping list you throw away every day anyway.

How to steer towards it

In the intake choose Tool or tracker, answer Just me to *who will use it*, and state in the description or under *special wishes*, in so many words: everything local, no storage on a server.

Mia then builds an app that runs entirely in your browser and keeps data on your device.

What you notice

The result opens instantly and reacts immediately — no loading screens, no waiting on a server. Switch on airplane mode and the app keeps working.

The flip side: what you enter on your laptop will not show up on your phone. If you do want that, you need a backend — that is the next episode.

Frequently asked questions

Is my data safe then?

It lives only on your device and never leaves it. Do note: clear your browser data and it is gone.

Can I add storage later?

Yes. Ask Mia to keep the data in a database from now on; she builds the backend around it.