AppGrowthLab (by SplitMetrics) - 55 app growth lessons from 30 app marketing experts
SurveyMonkey Intelligence - Usage and download metrics for all mobile apps
The Creative Marketer - Techniques & tools for copywriters, marketers, and creatives
Wedgies - Realtime polling over social media
Adapty - Low-code price personalization for in-app subscriptions
Poltio - Create and share questions, get answers.