Hi, guys! I now run 5k on daily basis and feel that it is not enough for me, so I started to run 10k every other day. I have been doing it for about a month. Now I start to think about half-marathon and I will increase distance every other day by 1k. How much time does it take you to jog 5k, 10k or half-marathon? Do you use any apps? Any advice at all?