AskNicely - Collect customer experience feedback on a daily basis and empower your team to take immediate action to drive retention, upgrades, reviews and referrals.
Sensor Tower - Sensor Tower is a platform for app store optimization and app industry intelligence.
Delighted - The fastest and easiest way to gather actionable feedback from your customers
App Annie - App Annie is a marketing analytics tool available for apps of all kinds. With App Annie, you can track sales, traffic, and a variety of other factors pertinent to monitoring an app's trajectory.
Survicate - Collect feedback on your website and find out more about your visitors.
appfigures - Cross-platform app store analytics for all of your mobile apps.