Print a bubble sheet, fill it in by hand like always, then scan it with any phone's camera. No new hardware, no per-student app, no training required.
One sheet per class, per period — QR-coded and dated, ready before the day starts. Print a day at a time, or a whole week at once.
A teacher fills in bubbles the way they always have — Present, Absent, or whatever your school tracks. No devices in the classroom.
Point any phone's camera at the sheet — it locks on and reads every row automatically, right in the browser. Attendance lands in your dashboard instantly.