Personally, I think piracy is a tool of the desperate, the disheartened and those that don’t care for awarding merit. The desperate if a software is too hard to come by legitimately, the disheartened as a form of protest if the software/company has draconian practices at play, and those that don’t award merit because they would, if not never, at least rarely buy/rent anything if not forced to.
FOSS is nice and all, but do mind people are expending their time in such projects, so if you think a project is good and you can afford it, I’d suggest supporting financially the creators.
Copypasta of my comment in the post in the F-Droid community:
Chrono is extremely good for me, given often having to have alarms in the oddest of times, and it allowing me to schedule alarms as one-time only, daily, for specific weekdays, for specific dates, or for date ranges, as well as having the options to force to work in the background if lack of memory in the phone kills it.
As for alternatives I wish I could find, Librera Reader is still the best ebook reader I found outside of Google Play, but I could use it having better controls. Might even take the dust off my PS Vita to read ebooks, as I abhor touch controls due to them usually not being optimized for either precision or view space available (even on-screen controls might help), and on the Vita I can use the physical controls to move the ebooks’ pages around.