This app lets you have control of the attendance to an event using QR codes, so you can register the hour of arrival and departure, and also tells the amount of time each person was present in the event.

Features:
- Uses text content qr codes with the name of the person for simplicity
- You can export the attendance list to excel (.csv) files
- Auto detect arrival or departure, and continuous scanning option
- No limits to the amount of QR codes that can be scanned
- Alarm if a code is scanned twice

How to export? Tap on the icon of the wrench located at the bottom left of the screen and then select the export option.
Exported excel files are saved inside the folder with the name "QR Attendance Control"

Observation: you must have installed Barcode Scanner from ZXing in order to use the qr scanner.

Instructions: To create QR codes, go to any of the free QR code generators that exist on the internet, select text content, and then generate QR codes with the name of each person you want to register. After that, deliver the QR codes to each person, so they can show you their code when they arrive or leave.