Cool! Bubble game kind of reminds me of Mindsnacks
Simple and allows you to add your own vocabulary (even English to English).
Not enough ratings yet to assess Vocab.Tutor.
Vocab.Tutor appears legitimate, with a few gaps. AppsHunter Legitimacy Score for Vocab.Tutor is 73/100.
Based on 73 of 100 points across 7 verification signals from App Store and developer data.