Trainerfy - a Guernsey Digital Greenhouse finalist - is building a platform that unifies personal trainers and clients in one seamless, intuitive app. But before any app can scale, the founders need to be aligned on what they’re building, why, and for whom. That’s where INSO stepped in. Through a focused, high-impact sprint, we helped both founders cut through assumptions, clarify the core problem, and lock in a shared product vision. What followed was a breakthrough in direction: a clear feature set, a unified user journey, and a roadmap that removed weeks of back-and-forth prototyping.