Student focus mostly breaks on the phone. Social apps, notifications, and the habit of checking pull attention away from the work. The best focus apps solve this at the source.
What students actually need
Not a complex system. Students need two things: a way to block distracting apps during study time, and a simple way to track what they're working on each day. Everything else is overhead.
App blockers
StrictBlock blocks your chosen apps on a schedule. Set it to activate during your study hours and it stays on without requiring willpower. Best for students who keep opening social apps between paragraphs.
Forest and Focus Bear try similar ideas with a different feel.
Simple task trackers
Apple Reminders or a pinned note is enough. Write the 3 to 5 things you want to finish today and nothing else. Todoist works if you need more structure.
Timers and focus sessions
Pomodoro timers (25-minute focused blocks with short breaks) work well for sustained concentration. Be Focused, Focus Keeper, or a simple iOS timer all work.
A simple student focus setup
StrictBlock active during study hours, a short daily list, and a boring home screen cover most of what a student needs. Keep the tools minimal so they don't become another distraction.