Top coat for a glossy finish

This is the Dearus One-Step Gel Nail D592 Top Coat, which is great for everyday use. I bought it along with Ohora gel nail stickers because I was told I needed to apply it to add a glossy finish and extend the longevity. And indeed, the difference between applying it and not applying it is huge, so I realized it is a must-have. The shine feels truly exceptional. It looks so pretty with that glossy, sparkling shine. The brush is neat and tidy, so the application is decent, and it dries quite quickly. It's a shame that it seems to be discontinued and can't be purchased anymore... True to its "One-Step" name, I heard that other colored versions don't require a base coat or top coat. However, I think a top coat is necessary, if only for longevity.