Spike.sh - Spike is an incident management platform that alerts via slack, phone and email and automatic escalations to help teams fix infrastructure problems.
Apple App Analytics - Apple's very own iTunes Connect App Analytics
Clerk - Clerk.io, the artificial intelligence for e-commerce that knows your customers interests.
My Motiff - Allowing you to stay connected in realtime
Sendblue - Programmatically send iMessage and SMS
Usage Analytics in appFigures - Track usage for your app along side downloads, ranks & more