Hi Roger,
Thanks for your interest!
It used to be incomplete, but now AnkiDroid has complete SRS :-)
The algorithm is exactly the same as the normal Anki desktop software.
(actually, only "leeches" are not implemented, as far as I know)
Yes, AnkiDroid is stable, and productive.
I encourage you to try it, and report any problem if you find one.
Cheers!
Nicolas
PS: Where did you read this? It might be some old description that we
need to update.