iRate
Library to promote iPhone and Mac App Store apps
...The goal is to increase high-quality, voluntary ratings while avoiding the fatigue that comes from aggressive dialogs. You configure the behavior through a handful of properties, and the library handles the rest: showing the prompt, respecting “remind me later,” and redirecting to the correct App Store page. It includes sensible defaults so you can drop it in and get results quickly, yet it’s flexible enough to honor edge cases like beta builds or specific app versions. For indie developers and teams alike, it’s a pragmatic way to turn satisfied users into visible store reviews without building custom logic from scratch.