Saw this deal on reddit here. Many comments on the subreddit page praising the app. There is a free version if you are interested in trying it out - by the looks of it, the only difference is one banner of ads. I tried it out myself, it seemed to download files a little bit faster for sites that have relatively slow download speeds.
I am not too sure of how Google Play's date system works exactly but as of now (Sunday, 11:52am, 23/08/2020) it says there is 6 days remaining on the deal.
Enjoy!
I highly recommend this app for people wanted to save video streams. (Not YouTube, use NewPipe for that.)