Is kamesame totally free? I know kaniwani only has levels 1 to 3 (?) for free but anything more needs a subscription.
It's free and runs its infrastructure through donations. I have seen comments from the site owner that if they do ever add a paid model, it's more of adding quality-of-life features for paid users.
This is from the first post on this page:
Hello, Internet! KameSame is a free Japanese learning tool that is designed to offer a fast, streamlined user interface and a robust feature set that provide users with a variety of ways to learn Japanese. Because it features a complete dictionary, it can be your primary Japanese learning tool for years to come.
Highlights
Four ways to do lessons for over 10,000 kanji and over 180,000 vocabulary:
From a list (e.g. N5 vocabulary, Top 10,000 Words, or Level 11-20 WaniKani Kanji)
From your WaniKani progress [Requires WaniKani API Key]
From free-from Japanese language content (i.e. pasting in lyrics, transcripts, articles)
From searching for any item and starting a one-off lesson
Study both production (typing in Japanese) and recognition (providing English definitions) skills
Audio recordings for every reading of every word (around 300,000 recordings)
Keyboard navigation and shortcuts for nearly every user interface action (see them with / key)
A mobile-optimized Progressive Web App experience
Customizable Japanese spellings and English definitions for every word
An experience point (XP) system as you do reviews spanning 100 levels
Resource links for every word to other dictionaries, image searches, example sentences, and news articles
An “alternate match” system so that you aren’t marked wrong when you provide a Japanese word that also means what the system was expecting
One-click study actions like undo, mark-as-failed, learn/burn (and unlearn/unburn), skip, and block items
Every page is safe to reload the page and navigate back & forward in the browser history
