This app was mentioned in 6 comments, with an average of 3.67 upvotes
I use Tenpenchii (Android) to manage my Hummingbird.me account when I don't want to deal with the website (which runs like ass on mobile)
These suggestions are for Android.
For anyone who uses Hummingbird, I recommend <strong>Tenpenchii</strong>.
It ain't perfect, but it's better than the other Hummingbird apps (last I checked). My one problem with it is the search is (somehow) worse than the Hummingbird site search.
I use Trakt for all my shows & movies (anime included) and <strong>SeriesGuide</strong> seems to work the best for my needs.
When on a computer, the websites work the best, imo.
I was very satisfied with Manga Watcher until it stopped working for me a couple of weeks ago. I switched to Manga Rock and I've got to say I'm pretty happy with it.
I also use Tenpenchii to keep track of anime and manga.
As other people have said, Pocket MAL & Atarashi are the best clients. You might also wanna check out Tenpenchii for Hummingbird.me. hummingbird.me is a recent and IMHO quite promising alternatice to MAL; there is a way to import your MAL list with just a few clicks.
Also, if you don't use windows:
Mobile:
Desktop:
[Note, most of these are tailored for Hummingbird, other alternatives welcome in comments :P]