# OneMRR > Track MRR, churn and the customers behind every change across Stripe, Shopify and Wix. - [Quickstart](https://docs.onemrr.dev/quickstart.md): Connect your billing, check your MRR, see what moves it, and catch churn early. - [Connect a billing platform](https://docs.onemrr.dev/get-started/connect.md): Create your account and connect Stripe, Shopify or Wix with a read-only key. - [Your first import](https://docs.onemrr.dev/get-started/first-import.md): What OneMRR reads from each platform, how to follow the import, and how it stays up to date. - [Check your first MRR number](https://docs.onemrr.dev/get-started/check-your-mrr.md): Compare OneMRR's MRR with each platform's billing before you share it. - [The Overview](https://docs.onemrr.dev/analytics/overview.md): MRR and ARR, the main metrics over time, and the filters that apply to every report. - [MRR movements](https://docs.onemrr.dev/analytics/mrr-movements.md): The five ways MRR changes each month, and the customers behind each one. - [Customers](https://docs.onemrr.dev/analytics/customers.md): Every customer, what they pay, and how their MRR is worked out. - [Growth](https://docs.onemrr.dev/analytics/growth.md): How fast MRR grows over a month, a quarter and a year. - [Discounts and one-time revenue](https://docs.onemrr.dev/analytics/discounts-and-one-time.md): What coupons cost you each month, and the revenue that never counts as MRR. - [LTV and unit economics](https://docs.onemrr.dev/analytics/ltv.md): Lifetime value, acquisition cost, and how long a customer takes to pay back. - [Forecast](https://docs.onemrr.dev/analytics/forecast.md): Where MRR is heading if recent trends hold. - [How MRR is calculated](https://docs.onemrr.dev/analytics/how-mrr-is-calculated.md): The rules OneMRR applies to every source, and the settings that change your numbers. - [Break down your MRR](https://docs.onemrr.dev/breakdowns/overview.md): Split MRR and its movements by plan, platform, country, or any breakdown of your own. - [Drill down](https://docs.onemrr.dev/breakdowns/drill-down.md): Select a part to split it further. Every report follows. - [Custom breakdowns and drill order](https://docs.onemrr.dev/breakdowns/custom-breakdowns.md): Split MRR your own way with simple rules, and choose what opens when you drill in. - [Churn and retention](https://docs.onemrr.dev/churn/overview.md): How much revenue and how many customers you lose each month, and who. - [Retention and cohorts](https://docs.onemrr.dev/churn/retention.md): How long customers stay, and how their revenue holds up, by the month they started. - [Set up Churn Signals](https://docs.onemrr.dev/churn/churn-signals.md): Send a few events from your product, and OneMRR flags paying customers whose use drops before they cancel. - [Act on at-risk customers](https://docs.onemrr.dev/churn/at-risk.md): Work through flagged customers, reach out, and see what happened next. - [Automations](https://docs.onemrr.dev/churn/automations.md): Choose what happens when a customer is flagged, and when someone cancels. - [Cancellation feedback](https://docs.onemrr.dev/churn/cancellation-feedback.md): Ask customers why they cancelled, and see the reasons add up. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.