If you don't want to download a gacha app on your phone, or can't, there is a website you can go on to use Gacha studio online, called lunime.com. You can use it, though it is only a demo version and gacha studio has less options than gacha life or verse. I would strongly advise against going on other gacha websites, just cause since gacha is popular, there could be websites with viruses and all that. I know lunime isn't because I have used it, it does not require you to download anything either, just Google "gacha studio on lunime" and it should be the first thing. If you have computer restrictions it should still work, it did on my k12 computer, which was restricted. So if you do not want to download it, this is something you can use instead.