Is KIMI a grow taller device really works?

its waste of time...i tried it i was 5"10 and still ! although i worked on my diet and i usually exercise..i did stretching excercises ....just waste of time! now iam asking about growth flex v...is it good or fake does it add up ur height!? iam so interested...iam 21 years old i want 1,2 or 3 inches this will be great for my life! i play Basketball and i need some height!