We are proud to be planning to offer our newest, affordable sightseeing option - AUDIO TOURS. Can't make one of our guided tours? No problem, we have recorded some of our best tour guides giving their tours and put them on a GPS enabled app. Launch date is for Mid-June.
In the meantime, we recommend this high-quality and free Berlin overview audio tour from Rick Steves, which you could download to a podcast player, such as iTunes or you could download his free app.