Tubemate is the best youtube dowloader app for android. The app is very small under 10 mb but the feature it offers are very much. We can download any youtube videos at the maximum resolution using Tubemate. We can actually choose the resolution before downloading. If the video is 4K on youtube we can download in 4K resolution, which is the biggest advantage of tubemate. We can also download mp3 from the video. The best thing is the downloading, it downloads videos in 4 segments and finally merge it together so the downloading is quick and the chance of failure is very less. The only bad thing is Tubemate app is not in play store but we can download it from tubemate.net .