Start a poll, drop the one link in the group chat, and see when everyone's free. Offer 2 to 5 times for people to tick, or ask when they're free and let them type it ("Friday after 7, Saturday before 3"). OutHere finds the overlap.
It's free, and nobody needs the app. Start a poll right here from any phone or laptop by confirming your number with a text code; friends answer from the link the same way, on iPhone or Android. Locking in the winning time, which turns the poll into a plan, happens in the free iPhone app.
Guides: plan a playdate · find a time to hang out · plan a game night · plan a group dinner · questions