Install app

Faster access, works offline.

Live demo

The real software. No sign-up.

You are testing THENN·OS with sample data from the TC Grünwald tennis school — first guided through all four roles, then freely.

  1. Owner
  2. Coach
  3. Player
  4. Parents
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Servers in Germany · GDPR-compliant · no sign-up required

If you are logged in: your session is kept — the demo runs separately.