I'm building Repple (https://repple.sh), a free flashcard app with spaced repetition scheduling and some (tasteful imo) AI additions. I've been using Anki for 10+ years and love it but always wanted something with a cleaner UI and that's a bit easier to experiment with. The recent Anki ownership change pushed me to finally make something.

Added a REST API (https://repple.sh/developers) a few weeks ago so you can build on top of it. Decks, cards, reviews, etc.

Feature delta over Anki:

- Tab-autocomplete for text fields

- Automatic image-gen for image fields

- Optional rephrasing that changes wording each review to avoid pattern matching

- Basic PDF library & incremental reading support

- "Orphan" card detection; i.e. knowledge that isn't well connected

- ... + a bunch of other qol improvements like semantic search, etc.