I've practiced with & without apps for a similar time period. The apps helped me keep a schedule I found difficult without them. YMMV but for me headspace was worth it.
Headspace is probably the easiest and best way to get started with meditation, due to its great instructions, sublime voice quality (both technically and phonetically/subjectively), and clear motivating daily progress (with reminders).
This video [1], which occurs early in the free introduction course on Headspace, is a good example of why Headspace is vastly more than just a scheduling app. Meditation can be hard, but Headspaces makes it easy to get into.