4 coats. Trust me
Works exceptionally well. I was very skeptical at first and didn’t think it worked as advertised until I starting putting on more coats. Start with 3 minimum and the next day do one more. Let each coat thoroughly dry and you can definitely put on more than 4. I put heavy on the edges of the nail where mine tend to crack and the nails flex more instead of cracking if I hit my hand. I’m very happy and the price is good. Lasts a week minimum if you are careful  and wear gloves when doing dishes you can definitely get 2 weeks.
Rating: 5 stars