Same here. RIF was my default app of choice when using reddit, both to read and make posts.
It's so sad to see this coming to an end. But I'm glad to know this is not over and people are moving to other places to reestablish their communities.
My only wish is that TalkLittle manages ro create a fedi app that works just like RIF.
Until then, so long and thank you for making this wonderful app.