Contact
The best way to reach Heliotempo is by email:
What to write about
- Corrections. If a time or value looks wrong, please include the place (or coordinates), the date and what you expected. That makes it possible to check the calculation quickly.
- Questions about the tools, the methods or the results.
- Ideas for new tools or improvements.
- Privacy requests, for example to exercise your rights under the GDPR. See the privacy policy for details.
- Press and collaborations.
I read every message. Heliotempo is a one-person project, so replies can take a few days.
Heliotempo does not offer personal consultations, for example for building permits or solar installations. For decisions with legal or financial consequences, please consult a qualified professional.
Last updated September 23, 2026