Don’t use a belt until you really need it—when you’re working with weights so heavy they allow you only five repetitions or fewer.
Counting on a belt every workout won’t let your core to strengthen optimally, and that will slow your overall gains. Using straps has the same effect on grip strength and won’t allow you to get the massive, meaty forearms you probably want.
As to whether these accessories are “cheating,” that’s really in the eye of the beholder. Belts are allowed in lifting competitions, but straps aren’t. Using a belt will let you lift slightly heavier, but not using one may put you at risk for injury if anything go wrong during a heavy set.
Straps aren’t really cheating if you use them on a rowing exercise and your goal is to keep your grip strength from limiting the reps you do.
In other words, be judicious about your use of accessories and always know why you’re using them. Don’t use them just to save your ego and add a couple of more pounds to the bar. That’s just cheating yourself.