Where do the readings and meanings come from?

From JMdict and KANJIDIC2 (Electronic Dictionary Research and Development Group, CC BY-SA 4.0); nothing is typed from memory.

Counter words JMdict doesn't list come from Wiktionary's counters appendix, example sentences from Tatoeba (each one reviewed), stroke order from KanjiVG, and the JLPT level lists from Jonathan Waller. The audio is text-to-speech.