I've found it out when saw my husband on Tinder through my friend's account.
When I asked him why, he denied and said that it was fake and someone could just use his pictures for the account.
Of course I didn't believe him and installed a monitoring application so I could see all his messages.Obviously, it was him personally on Tinder and I saw how he flirted with the girls there.
If you are also afraid that your partner can be unfaithful, then you can try one of these monitoring applications https://www.top10spyapps.com