Lexiverse has no account and no sign-up. Your levels, coins, streak, records and statistics are stored on your phone.
All the words of the six planets are inside the app: every game plays in airplane mode. The daily challenge is made on the phone from the date.
The network is used for ads, served by Google AdMob, and by Google Firebase: crash reports, the app's remote settings and, if you allow ads, usage statistics. In Europe, a consent form asks your choice before any ad; if you refuse, Lexiverse requests no ads and usage statistics stay off. Privacy & ad consent, in Settings, lets you change your choice.
The details are in the privacy policy.