Whenever I click on the study button, it takes me to the lesson view with the start button but the app freeze and I have to kill it to restart it.
What version of Android are you running? What locale are you in? Could you take a screenshot of what you see? (I believe you take screenshots by holding power + volume down for 1 second)
Problem solved with the last update it seems.
Had same issue with Motorola X4 and Android 9, also fixed after last update
Thanks for the update! Fixed in v0.5
