Throughout the entire Technical Preview a whole new scheme for updating Windows 10 was used.
It involved fast and slow rings, which controlled how frequently updates were installed on the participant’s devices depending on which ring they belonged to.
More than once, I've unlocked my i Pad to see an app and a folder immediately show the updating symbol.
I don't know which app in the folder is updating, but the one not in the folder is Memrise. The only way for an app to update is through the App Store.
Some automatic updates for Apps are as big as 60MB.
Updates can occur for many reasons: new features being added, fixing bugs, or, most importantly, patching security flaws.
Sometimes it's irritating getting notified of updates to programs when you're working or playing a game, and it isn't uncommon for automatic updating to lack a disable button.
I looked in the preferences, and Memrise is not even listed in the long list of apps that have settings. To disable the App Store automatically downloading updates, open the Settings app, tap on i Tunes & App Store, then toggle Updates off under Automatic Downloads (so it is white, not green).
There is no settings icon on the main screen of Memrise, and I can't log in until I look up my password. Note this will disable automatic updating for apps, not just specific ones.
With all of the Internet-connected Windows computers in the world today, Microsoft has faced challenges in keeping all of those machines as secure as possible.