Candle

Candle launched with a deliberately stripped-down MVP: a single daily question prompt delivered via text message, requiring just one-minute responses from both participants. ​​‌‌‌‌‌‌‌​‌‌​​‌​​​​​​‌‌​‌‌‌​​​‌‌The founders shipped within weeks rather than months, rejecting feature-rich alternatives like video calls, streak tracking, or social sharing. They intentionally omitted gamification mechanics, elaborate onboarding flows, and premium tiers—betting that simplicity would drive daily habit formation better than complexity. This constraint-driven approach validated quickly. Early users showed 70%+ daily engagement rates, with couples reporting deeper conversations within two weeks. The friction-free experience meant retention didn't depend on sophisticated retention engineering. However, the minimalist design later created scaling challenges: users eventually wanted more variety and customization, forcing Candle to gradually add features they'd initially rejected. Their execution proved that ruthless simplification accelerates product-market fit discovery, though it required planned evolution rather than remaining static.