Notability is one of the best note-taking apps on iPad. But using it as your planner is like using a voice recorder as your calendar — it captures beautifully, but it doesn’t organize what comes next. If someone asked you to name the most popular iPad apps among students and professionals, Notability would make the list. And for good reason. It’s a genuinely great note-taking app — smooth handwriting, audio recording synced to your writing, solid PDF annotation. But somewhere…