What's the MOST SIMPLE roulette advicestrategy you could give

demo rouletteI downloaded roulette royale from playstore for my phone. It works alrht and has both single and double zero. It's free to play but it's more like a simulator. No real dealers or $. There are options to play solo or live with others. I sometimes use it to practice new systems or to just kill a few minutes.There is absolutely no skill AT ALL with roulette. But. There is math! Roulette is a game of probability, the dealers spin in different ways every time to rule out consistently hitting the same number bands. (They change speed in the roll, speed of the table turn, strength in the push, etc)