Yep. Ultimate Timeline puts user_data in local storage. E.g.: JSON.parse(localStorage.getItem('timeln_cache')) then contains information like:
{"level":3,"character":"友","meaning":"friend","onyomi":"ゆう","kunyomi":"とも","important_reading":"onyomi","nanori":null,"user_specific":{"srs":"apprentice","srs_numeric":3,"unlocked_date":1501555165,"available_date":1501812000,"burned":false,"burned_date":0,"meaning_correct":2,"meaning_incorrect":0,"meaning_max_streak":2,"meaning_current_streak":2,"reading_correct":2,"reading_incorrect":0,"reading_max_streak":2,"reading_current_streak":2,"meaning_note":null,"reading_note":null,"user_synonyms":null}}
The important part being: "srs_numeric":3.