dating apps

my boyfriend logged into his emails on my phone. i saw there was some emails for Tinder basically saying he had a message from blahblah anyway.. he’s never had the app downloaded on his iPhone (he’s had the iPhone account since we got together he got a new phone then) anyway he’s saying it’s not him I’ve never used a dating site in my life but just wondering if you can use Tinder on the web like google? Sounds stupid me asking this. I’ve just never been on any sites like this.. I’ve had people I know send me 3 accounts 2 of which was his pictures different name & age 1 was his actual name & age he’s saying they’re all fake. But I just have a bad feeling about this😞