EDIT: Many Hiffers are reporting this isn't showing up for them in their account, so YMMV.
We might as well keep the free 7-Eleven mobile app on our phones at this point, because they just keep giving away free food. What's the current offer? Oh, I don't know, just a free King Size Reese's at 7-Eleven!!!!! That sound you heard was me fainting with anticipation.
As before, Android users aren't excluded either. In order to get this, open the app, tap the dollar sign at the top, and create/login to your account. The offer should then appear. Make sure you wait until you're at the store to click it because there's a 15 minute time limit on it!
[thanks to everyone who sent this in!]