Didn't know what to expect as I had never done a self-guided tour before. This tour is very fun though! You follow the official "Trail of independence" that is also marked on the ground and get regular and timely information about nearby sights. This works quite well even without the app. The pacing of the tour is on the spot such that you don't get too little information for each sight but also aren't stuck at one place for ages. The audio could be a bit more engaging though. 5$ is a fair price, would recommend.