Which string is on the racket and how hard was it strung?
How old is the stringing and when should it be restrung?
What is the string thickness and length of the long and cross strings?
This and other information can be stored via the free app. The owner/admin of the QR sticker can then overwrite this data again and again with each new stringing. This means that only one sticker is needed for each tennis racket to be personalized. Stringers, coaches or sports shops can use this app to add all customers to a database. Individual players or families with several rackets always have an overview when the rackets are managed via the app. The racket can be scanned with any QR scanner. The information can be retrieved at any time. For example, during a tournament or on vacation, a stringer can read the data and string the racket again immediately.