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Dylan Lualdi
- Founder of RCKit
- $8000 monthly recurring revenue
From another newsletter a few months back…
Dylan crossed $8K MRR with RCKit. It’s a third-party app to keep track of your RevenueCat reports
RevenueCat is a platform that makes it easy for app developers to enable in-app purchases, used by 38,000+ apps 
Best I can tell, Dylan was developing another app when he saw some shortcomings with RevenueCat and built RCKit to fix them.
Classic piggyback strategy 
What apps / tools / services do you use that could be improved by a third-party product or service?
Other examples of successful piggyback businesses 