Paris doesn't come cheap, but the Free & Frugal Paris app ($3) will help you live la vie bohème. Yes, it's ironic that you have to pay for information, but you pay for the experience of travel writer Christopher Pitts, who moved to Paris in 2001. For the past decade, he has sought out the best and cheapest baguettes of the city, info about beautiful, free museums like the Musée Carnavalet, and where and when you can attend free festivals or concerts. He'll offer free yet memorable activities you can do during your stay.
Living La Vie Bohème