Sustainable energy storage. Despite advances in technology, finding efficient and affordable ways to store renewable energy for long-term use remains a significant challenge.
An all in one solution that combine the best features of various smart home devices into a single, I think intuitive interface could be really valuable.
I think there's still room for innovation in personal finance management. I haven't seen a tool that truly simplifies budgeting while also providing real-time financial advice.
Tab Wrangler