Theobase GmbH Digital tools with a purpose
Current theme: System

Theobase · application

A neighbourhood that stays in touch.

QuartierApp connects neighbours, families and neighbourhoods so that nobody quietly slips out of view. Simple to use — especially for people who are often left alone with the usual technology.

Closed pilot · access by invitation

At a glance

Application
QuartierApp / nachbar·io
For whom
Older people · relatives · neighbourhoods
Status
Closed pilot (2026)
Access
invitation code only
Data
EU, sparing

The problem

Who notices when someone quietly slips out of view?

Closeness happens less on its own these days. People living alone do not always get in touch — and relatives often live far away. The plan to drop by is easily put off, until a good intention has quietly become too late.

QuartierApp wants to close that gap without being intrusive: a quiet line between neighbours, family and neighbourhood.

What QuartierApp does

Stay close, without the effort

Not another loud app. A few quiet paths, so that contact and help stay easy day to day.

Staying in touch

A line that stays open

Neighbours and family stay connected without constantly having to ask. A short hello is enough to make clear: all is well.

Helping each other

Small help, quickly asked for

A bit of shopping, an errand, someone to listen: whoever needs something just asks — whoever can help, sees it. A neighbourhood finding its way back together.

Usable by everyone

Large type, clear paths

Built for people who struggle with the usual technology: calm, understandable, with read-aloud output and visible contrast.

Trust

Data about people who need protecting.

QuartierApp is meant for older people and their relatives. Data like that deserves particular care — which is why privacy here is not a footnote but part of how it is built.

  • Sparing with data, clear roles, processing in the EU. Who sees what is governed in a way you can follow.
  • No selling of data, no tracking, no advertising. The closed pilot starts without any public flow of data.
  • People decide, not automation. The important steps stay in the hands of those involved.

Technology for older people must never be complicated. If it is, I have not done my job.

— Thomas Theobald, founder of Theobase GmbH

Where it stands

A closed pilot — deliberately small.

QuartierApp currently runs as a closed pilot with individual families. No public launch, no advertising — first it has to hold up in real everyday life, then it opens.

If you are a neighbourhood, an institution or a family that this might suit, I would be glad to talk.

Taking part

Does QuartierApp fit your neighbourhood?

Pilot partners and relatives who want to be involved early are best off getting in touch directly.