Firebase data base store problem

hello every one im facing problem with my app ,my app is attendance app using QR code so my problem with Firebase db with i scan for time in and time out it replace old one but i want to keep all data and save it every day …
any help
will be thankful

It means your algorithms is wrong. But in this case instead of using firebase it will be good to use gsheet, there user can track their attendance in daywise or particular date, or can track the whole attendance and so on
Anyway show your blocks , we will tell you where you need to correct it

thank you for a idea i used gsheet and its work

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