When you want to go back to the previous page in the app, you automatically click your back button on your mobile, but then you get a warning sign in the app asking if you are safe. If you press yes, you will go all the way back to the main menu, instead of a step back, to the menu of the course you are on. Please, let the “normal” back button in the mobile work, so that you will take a step back, without any warning sign. It's hard to remember to click on Zenler's back arrow, which sits at the top left corner. It's not a common place for a back button. It would also have been good to (when you click back) end up on the same module as the lesson you're on, because now when you click back you end up at the top of the course and you get to scroll down to find where you were. If the course contains a hundred lessons, it will be a lot of scrolling if you just want to take a step back. Most news sites and social media work so that you read an article and if you click back, you end up right where you were and can click on the next news article in the feed. It would be amazing if Zenler's side worked that way.