Legal Notice

Information pursuant to § 5 DDG (German Digital Services Act)

Matthias Henkert
Birkenstrasse 52c
16321 Bernau b. Berlin
Germany

Contact

Email: mail@stackbrain.de
Email enquiries are answered within 24 hours on business days.

Responsible for content pursuant to § 18 (2) MStV

Matthias Henkert (address as above)

Scope of this legal notice

This legal notice covers the following domains, all operated by the same provider:

• wattrun.app
• laufplan-pro.de
• rennrad-training.de
• rennrad-trainingsplan.de
• road-bike-training.com
• ki-trainingsplan-laufen.de
• ki-trainingsplan-rennrad.de
• halbmarathon-trainingsplan.de
• ai-run-coach.com
• marathon-pace.de
• marathon-pace-rechner.de
• marathon-pace-calculator.com
• ftp-rechner.de
• ftp-calculator.com
• pace-zonen.de

Disclaimer

The content of this website has been prepared with the greatest possible care. We cannot, however, guarantee the accuracy, completeness or timeliness of the information provided.

Note on AI-generated content

The associated app WattRun (wattrun.app) uses AI technology (Anthropic Claude) to generate training recommendations. These do not constitute medical advice and do not replace consultation with a doctor or qualified coach.

Last updated: May 2026