Counter Twinka

It allows you to count anything with the help of your friends or colleagues.
The fields of use are many.
It can be used, for example, to track the entry and exit of customers from shops and department stores in order to know the number of people present in the premises at any time. The ability to set intervention thresholds allows you to receive alerts via visual indication and vibration.
There is no limit to the number of people who can use the same meter at the same time. At any time, guests can leave the team and start a new count.
Through the configuration panel it is possible to set the size of the keys, the vibration and the energy saving mode.
The app is ad-free and has a counting threshold in the free version.