Classroom attendance in two seconds
You project a QR code that changes every 30 seconds. Students scan it with their phones and type their name. The register fills itself in, live.
No paper
The register fills in as students scan. At the end you export it to Excel or CSV.
Hard to cheat
The code changes every 30 seconds, so a photo sent to the group chat is useless a minute later.
Nobody is left out
A phone with no signal is not an absence: the teacher adds the student by hand, in one click.