The IOS application “GolfRange GmbH” allows the members and guest of the GolfRange GmbH based on the AWS login the usage of following services of her golfcourses: 1. Reservation of tee times 2. Tournament calendar, sign-in/-out 3. Event calendar/courses, sign-in/-out 4. Partner Club Abkommen 5. Gift vouchers, overview and purchase 6. Activities overview 7. Customer data 8. Buddy list 9. Account bookings 10. Handicap sheet 11. Score