Greenstones today introduces its first location-based TimeClock for iPhone. TimeClock tracks your time automatically as you enter or leave the office. You just need to indicate where do you work or select it on the map. The TimeClock will then track your location and calculate the hours you have worked even if the application is not running. Easily review and change times and comments manually. The weekly and monthly reports will help you export times to your preferred spreadsheet application.