For an external simulator, I keep coming back to the PM PrepCast Exam Simulator by Cornelius Fichtner.
Question quality is close to the real exam, the situational framing matches the current ECO, and the rationales actually teach you why each option is right or wrong, not just which one.
When evaluating any simulator, look for three things: question quality over quantity, alignment with the current ECO (and the July 2026 update), and detailed rationales on every option,
not just the correct answer. Recall-only simulators won't prepare you for the situational density of the real PMP.
BR