In a medium bowl, combine the mango, strawberries, red onion, jalapeño, and cilantro. Drizzle the freshly squeezed lime juice over the top, then sprinkle with chili powder and a pinch of salt.
Using a spoon, gently fold the ingredients together until evenly mixed, being careful not to mash the fruit. Taste and adjust the seasoning with more salt or lime juice as needed.
Serve immediately as a vibrant topping for grilled meats, tacos, or enjoy it simply with tortilla chips for a refreshing snack.