LessonOS: Attendance Tracker

LessonOS is a simple, offline class attendance and roll call app for teachers, tutors and coaches. Take the register with a single tap, schedule recurring classes, and see who's attending — all on your phone, with no account and no internet required.

Built for one teacher on one device. Your class lists and attendance stay private on your phone, not in someone else's cloud.

WHO IT'S FOR
• Teachers and tutors — tuition centres, private tutors, music, language and after-school classes taking attendance for each lesson
• Coaches — sports teams, martial arts dojos, dance and fitness classes checking students in
• Anyone replacing a paper register or a spreadsheet

TAKE THE REGISTER
• One-tap roll call for each class, with undo for mistakes
• Mark students absent (No-show) or record an excused make-up class
• Add attendance for a past date if you forgot to take it on the day
• Colour-code students by group, level or anything you like

CLASSES AND STUDENTS
• Recurring weekly classes (e.g. Mon/Wed/Fri) with every session generated for you
• Student list with search, status and notes
• Optional lesson packages and credits if you sell blocks of lessons

REPORTS
• Attendance rate per class and per student
• Who's attending regularly — and who's drifting away
• CSV export of students and attendance

PRIVATE AND OFFLINE
• Works with no internet connection
• No sign-up, no email, no password
• Backup and restore to your Google Drive when you choose
• 7 languages: English, Chinese, Japanese, Spanish, Malay, Indonesian and French

FREE TO START
Free for up to 15 students, 3 classes and 1 lesson package. Upgrade to LessonOS Pro (monthly or yearly with a 7-day free trial, or a one-time Lifetime purchase) for unlimited students and classes, full reports, make-up classes, Kiosk self check-in and backups.

LessonOS is designed for a single teacher's device. It does not sync between several teachers or devices, and it does not include parent messaging or school administration.

Recent changes:
What's new in 1.9.0
• Cancel class (Pro): cancel a class for one date from Check-in or Attendance. Extend members' end dates, add 1 credit, or change nothing. Undo any time.
• Freeze (Pro): pause a membership for travel or a break. The end date moves by the frozen days; use "Unfreeze now" when they return.
• Cancelled dates and frozen members don't count against attendance rates or streaks.
• Removing a Make-up now returns the right end date when other changes came after it.
• Bug fixes.