Welcome to the Candy Crush Saga Community
Do you have a question or need help with your game? Ask the Community.
I would say it isn't possible to complete every level without using boosters or gold.
Boosters are an integral part of the game and it is clear to me that some levels are definitely designed to be only completed with boosters, and only if you use boosters.
Sadly it also seems to be part of the game that you can only complete some levels by using gold bars to buy extra moves.