Start with the lowest HSK level that still feels useful, learn a small group of words each day, and review older cards before adding too many new ones.

Spaced repetition schedules reviews around forgetting, so hard words come back sooner and words you know well appear less often.

Yes. PandaBoo vocabulary cards include pronunciation support, examples, and Hanzi writing practice for words that include Chinese characters.

For most learners, 10 to 20 new words per day is enough if you also complete your due reviews consistently.