Fluenz German 1+2+3+4+5 for Mac, PC, iPhone, iPad & Android Phones, Version 3 Get immediate digital access to the full program on your computer, iPhone, Android phone, and iPad WITHIN HOURS OF PURCHASE. Upon Amazon confirmation well send you activation links so you can start Fluenz German right way (look for an Amazon email in your inbox within hours of purchase.) Fluenz blends a video tutor who explains the workings of Mandarin for English-speakers along with thousands of interactive workouts. 150 sessions of up to two and one-half hours each - the most comprehensive digital German program. The program gets installed on your desktop, laptop, iPhone, Android phone, iPad or it can be accessed online, allowing you to seamlessly switch between devices - the program always knows where you left off. A realistic, achievable approach to fluency that is being used by the US Navys elite units, the UN and UNICEF, Fortune 500 companies, HBS and other leading universities. THIRD PARTY SELLERS DO NOT HAVE VERSION 3. THEY'RE SELLING OLDER OR COUNTERFEIT VERSIONS, which no longer work and are NOT supported by Fluenz Inc. Second-hand versions are also NOT supported.