We decided to make a kit for Sketch that would already contain the main elements we usually require starting with iOS. Since then, we've tried out and modified the kit based on our own experience using it in customer projects. Believing it would be useful to others, we provided it to colleagues and other industry designers who provided ample, valuable feedback. We're confident that it's an extensively vetted, solid resource for doing UX work on iOS. We hope the community finds it has a similar impact to what it's done for us at Savvy Apps.