There’s no single right answer. It depends on what you actually want from a tracker. In rough order, here’s how we’d suggest picking:
If you want the best balance of speed, design and features → AniTrack
A modern UI, AniList-powered data, seasonal schedules and MAL/AniList import make it the easiest place to land today, especially if you’re tired of clunky, ad-laden alternatives.
If you care about community size above all → MyAnimeList
Nothing beats MAL for sheer volume of reviews and forum activity. Just be ready for the dated UI and the ads.
If you love stats, graphs and a modern API → AniList
Great data visualisation and a first-class GraphQL API. A solid daily-driver for data nerds.
If you want something friendly and sociable → Kitsu
Probably the easiest tracker for a total newcomer to pick up and enjoy.
If you need recommendations more than tracking → Anime-Planet
Its tag-based discovery and curated lists are still hard to beat.
If you’re a power user who wants every knob → Shikimori
Deep filters, clubs and reviews for people who live inside their tracker.
If you automate your anime library → AniDB
The right pick when metadata accuracy matters more than UI polish.