Tap the account switcher in the top left corner and you should see the option.
See my comment for a screenshot. I don’t know why I can’t seem to post a screenshot in the body of post. Every time I try it gets removed.
I’m not saying there is no other choice. Lemmy core devs are paid by a grant to work on Lemmy full time for example. Other apps developers may have a different funding model (donation, or even out of their own pocket), but for Sync, the dev is a commercial app developer so he does what he do best: making a paid app.
Right, he’s taking a free service and profiting off of it instead of contributing to the project. He’s a leech and he’s being supported by fools.