Independent software studio based in Berlin
We develop and publish our own apps for iPhone, iPad and Apple Watch. The operator is Maximilian Jonathan Bock & Tjark Sten Dieter Ruppe GbR, founded in 2026 by Maximilian Jonathan Bock and Tjark Sten Dieter Ruppe.
What we do
Our own products
We do not develop contract software. We build our own apps, which we publish ourselves and maintain over the long term.
Native Apple platforms
iOS, iPadOS and watchOS, implemented in Swift and SwiftUI.
Data protection by default
As far as possible, data stays on the user's device or in the user's iCloud. Analytics services run in the EU and only after explicit consent.
The company at a glance
| Company | Maximilian Jonathan Bock & Tjark Sten Dieter Ruppe GbR |
|---|---|
| Trading name | TJAX Labs |
| Legal form | Gesellschaft bürgerlichen Rechts (GbR), a partnership under German civil law (sections 705 ff. of the German Civil Code, BGB) |
| Registered office | Berlin, Germany |
| Founded | 2026 |
| Trade registration | 21 July 2026, Berlin |
| Partners | Maximilian Jonathan Bock, Tjark Sten Dieter Ruppe (each individually authorised to represent the company) |
| Company size | 2 partners, no employees |
| Industry | Software development (WZ 62.01.9 · NACE 62.01) |
In detail on the Company page.
Contact
Maximilian Jonathan Bock & Tjark Sten Dieter Ruppe GbRRichterstraße 1
12524 Berlin
Germany
| kontakt@tjaxlabs.de | |
| Telephone | +49 172 9894463 |
| Availability | Monday to Friday, 10:00–17:00 |
| Response time | usually within two business days |