SuperShe Island has grown from an all-female retreat into a social network — and its founder wants a million-dollar idea from its members.

Entrepreneur Kristina Roth launched the SuperShe app in November as a digital home for the community that started on her private island off the coast of Finland where men are banned.

Once the app hits 100,000 users, Roth plans to launch a competition in which SuperShe members will vie for a $1 million grant to fund a business, nonprofit or other project.

“The money is no strings attached,” Roth told The Post, adding that feedback from SuperShe users will play a role in picking a winner. “The idea is that everyone feels good about it — as a community, we invested and we empowered someone from our community.”

Nevertheless, the contest is likely a ways off — only about 4,000 users have signed up, Roth said Friday. SuperShe offers a weeklong free trial before charging $11.99 for a monthly subscription or $69.99 for a year.

Roth expects the user base to grow more quickly as people learn about the “SuperShe Millionaire” contest. SuperShe started promoting the competition plans in the app on Sunday, coinciding with International Women’s Day.

SuperShe bills itself as a “no-BS community” where women and non-binary people can share written posts and videos about money, food, fitness and other topics.

The Finnish island resort will still be a physical home for SuperShe, Roth said — the 10 finalists in the million-dollar competition will present their ideas there before a winner is selected.

SuperShe user Ljana Vimont said she thinks the contest’s winners could inspire other people working on big ideas.

“Whenever you’re passionate about something and you’re working on something, being able to get that funding to help it go to the next level can be really meaningful,” said Vimont, a managing director at Toronto-based Stinson Design.