how long does Streak Freeze last?
I bought Streak Freeze, but i noticed that it still allows me to buy it from the lingot store. I would think that Streak Freeze would last until you needed it, but the way it is represented in the lingot store leads me to believe that it only lasts for the day that it is bought, which is absurd. Does anyone have any knowledge about it?
The way it should work is that you buy it once, and then it sits there waiting for it to be used. Mine says Equipped and the button is gray rather than blue (in the Android app), and it's been sitting there for years. (Although I've also heard of people having equipped streak freezes that didn't work when needed.)
If you can still buy one, it sounds like yours isn't equipped yet.
annika_a, most of those people used their streak freeze without realizing it, then didn't purchase a new one, so it was not on hand when they needed it. It's why I created the post I linked in my other comment. It is super duper, duper, duper rare for the streak freeze to not work as designed. :)
It lasts forever until you miss a day. Then, you'll need to get a new one.
If it is available for purchase in the lingot store instead of the button being greyed out, it means that it is not equipped. Here is a discussion with much more information about protecting your streak with a streak freeze and some pitfalls to avoid. https://www.duolingo.com/comment/24771557
If it doesn't display as 'equipped', assume that you have used it without noticing and buy another. It should last indefinitely provided you meet your goal every day, and, in my experience, this has always been the case.