Most apps update stats every few minutes during live matches, but where you really see the differences is in historical data and predictions. I have two installed because it turned out one was systematically failing me on injury updates and accumulated yellow cards, and that leaves you with incomplete information when you want to analyze performance over a season. What works better is having one app you use mainly (based on the experience people mention above, the ones they talk about are pretty solid) and another backup one specifically for details the first one misses, like advanced possession stats or player heat maps. That way you're not dependent on just one and you cover your blind spots.