I use Anilist. It has a nice clean and user friendly interface. The progressive web app also works well on my device.
I used to use MAL through the MyAniList app (not to be confused with MAL) but switched to AniList during the api outage in 2018. Nowadays I mainly track manga and anime automatically through tachiyomiJ2K and aniyomi respectively so I don’t interact directly with AniList much, apart from browsing upcoming anime and discovering other series from writers, seiyuus, mangakas etc.
I use AniList. I also have automatic tracking in Tachiyomi and on my Jellyfin server through a plugin. There’s also a browser addon for that called MAL-Sync, which I used before. Without automatic tracking I’d be too lazy or forget to update my progress.
If you use any other tracking software, I would love to hear about it.
Anilist
Anilist.