Attention Insight - Maximize advertising campaign results and design performance with pre-launch analytics.

Chargebee - Chargebee lets you manage subscriptions and payments at scale, handle custom recurring billing scenarios, reduce subscription churn and simplify accounting.

Nirow - Habit tracking: Automated, Siri-ed, Calendar-ed, and More!

Chargify - Chargify is the best online billing software for all of your Recurring Billing needs. Learn more about simplifying your Subscription Billing today.

Purp - A smart to-do list and goal tracker app

Recurly - Subscription billing and recurring billing management. Recurly offers enterprise-class subscription billing for thousands of companies worldwide.