TÜV Rheinland LIFTIS alert – the elevator information system of the future. The TÜV Rheinland LIFTIS alert app gives you the option of displaying and understanding predefined faults in the operation of your elevator systems on your mobile device after they have been detected by the associated TÜV Rheinland LIFTIS alert sensors on the elevator. The operating states of your elevator system are displayed both as a push message and in a system and message overview. This supports you in introducing timely corrective countermeasures.