I built a tool for myself earlier this year that's very similar to this, and I wrote a bit about it here [1].
For the most part, I found that flashcards only help when they are crafted with care, and it's a skill that needs to be learnt [2]. But what I found particularly useful about my hacked-up setup is that every card is contextualized: if I need a refresher for the content of a card, I can revisit the location (website/pdf) for it.
Author here. You can move the sqlite database to a separate location by setting a variable, and that should resolve the syncing issues. I do this and have the files synced via Dropbox across my different machines.
For the most part, I found that flashcards only help when they are crafted with care, and it's a skill that needs to be learnt [2]. But what I found particularly useful about my hacked-up setup is that every card is contextualized: if I need a refresher for the content of a card, I can revisit the location (website/pdf) for it.
[1]: https://blog.jethro.dev/posts/taking_srs_seriously/ [2]: https://andymatuschak.org/prompts/