We asked this manicurist specifically about this question. The answer she gave me was that it can be maintained for more than a month, and there are two types of crystal nails, full and half. She suggested that I make half stickers because it is more natural.
This depends on the growth rate of your nails. The crystal nails will never fall off. However, after the nails grow slowly, the part of the crystal nails and the nails are clearly contrasted, which is not beautiful. At this time, you must choose Unloading or repairing, this stuff is very troublesome to unload and hurts your nails.