I studied for PMP exams using the simulator from Cornelius Fitchner. It was so good that when I was writing the exams, I found the questions so easy. I passed my PMP exams on my first attempt on 7th June 2019! I highly recommend using this simulator
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®