I use Soak-off Gel:
Flexible, Medium and Solid
It is applied onto a natural nail
Gel can be removed
within 15 minutes by Gel remover.
We change the Gel about each 3 weeks and
don't do infills.
For the extension I do for fixing broken nail
It dries instantly under a UV-A light,
so no more waiting for polish to dry.
I don't use acrylic.