The study timer for iPhone
Lock in.
Everything else can wait.
Start the timer and your distracting apps lock until you're done. Lock In tracks every hour, by subject, so you can see the work adding up.
Free to start. Pro comes with a 7-day free trial.
Lock mode
The apps that pull you away stay shut
Choose the apps that eat your study time. When a session starts they lock, and they open again when you finish.
- Block a list of apps, or allow only the few you need
- Built on Apple's Screen Time, so it works across your whole phone
- Your choices stay on your iPhone. We never see them
Stats
See where your hours go
Every session is saved against its subject, so a week of study is something you can look at.
- Daily, weekly, monthly and semester totals
- A heatmap of the last 18 weeks
- Streaks, levels and a daily goal to aim at
Plan
Plan the week around your exams
Lay out study blocks next to the classes and events already in your calendar, and count down to what's due.
- Day and multi-week views
- Exams and assignments picked up from your calendar
- A reminder before each session, with one tap to start
Focus insights
Learn when you focus best
Rate each session when it ends. Lock In turns those ratings into a weekly focus score and shows what helps.
- Your best time of day to study
- Focus by subject
- How locked sessions compare with unlocked ones
And the rest of what you'd want
Four ways to time it
Pomodoro, your own intervals, a stopwatch, or one deep block with no breaks.
Sound to study to
Brown noise, pink noise, ocean, rain or a fireplace, playing while the timer runs.
Squads
Join your friends, see who's studying right now, and compare hours for the week.
Streaks that survive holidays
Set your semester dates or switch on break mode and your streak waits for you.
Semester Wrapped
Your hours, top subject and best streak, ready to share when the semester ends.
On your Home Screen
A widget shows today's hours against your goal without opening the app.
Free to start
The timer is free for as long as you like. Pro adds the tools that keep you there.
Lock In
Free
- All four timer modes
- Subjects, streaks and levels
- This week's stats
- Squads with your friends
Lock In Pro
7 days free
- Lock your distracting apps
- Full stats and focus insights
- Exam and assignment countdowns
- Soundscapes
Monthly or yearly. Prices are shown in the app before you subscribe, and you can cancel any time.
