I can't speak to the Fire but the only "official" electronic score keeping devices are the MonRoi, PlyCounter and eNotate on a very specific Dell Axim model (and that software is no longer sold due to the passing of the creator). So, if you want something for rated events, you likely won't be able to use anything else.
Some TDs will allow other devices but it isn't officially allowed.
I would like an inexpensive touch or pen tablet to use for quick and easy recording of my moves at chess tournaments and informal games. I only need the ability to input moves for both sides and save them. I do not want or need analysis capability as I have that with my desktop machines at home.
Looking at tablets, the Amazon Fire 8" HD tablet is $79.00 and cheaper than any of the other Android and Apple products. Are there suitable apps that work with the Fire that will record and save chess moves for later analysis at home? Do Android apps work with the Fire and if so which ones are simple and quick to use in time pressure? I always tend to miss or leave out moves when using a written ledger.