Tydlig uses an analytics package to try to understand how the application is being used. It records anonymous crash data, how often the application is used and which features are used the most. None of your personal information or entered numbers are collected. This data is used to improve the application, for example to design menus so the functions that are used together are grouped together, and give the most commonly used functions the best spot in the interface. For further information here is the privacy policy of the analytics package.
If you would like to turn this off there is a switch called "Send diagnostics". Press the "gear" Settings icon in the upper left, switch off "Send diagnostics" and no further data will be sent.