Every SaaS founder has a metrics spreadsheet they swear they'll update weekly. Most of those spreadsheets are abandoned by the third Monday, because updating them is a chore that competes with everything else. The numbers go stale, and stale metrics are worse than none — they're confidently wrong.
I built SubMetrics for the version of me that never opened the spreadsheet again.
30-second takeaway
- The metric isn't the hard part; the maintenance is.
- Paste the numbers once and you get MRR, ARPU, churn, LTV — and a plain-English read on what they mean.
- A tool you actually use beats a model you guilt-trip yourself about.
The spreadsheet is a tombstone
Spreadsheets are where metrics go to die. They require a ritual — export, format, remember the formula you wrote — and the ritual is exactly what breaks. The result is a file that says "last updated 4 months ago" sitting in a drive, quietly misleading every decision made from it.
Removing the ritual is the whole product. Paste the current numbers and get the read now, while they're real.
What the tool does
Paste your subscription numbers and get MRR, ARPU, churn, LTV, and a plain-English interpretation of what's moving. Open it and try — no signup.
SubMetrics runs in the browser, no account, no key.
FAQ
What is SubMetrics?
A browser tool that turns pasted subscription numbers into MRR, ARPU, churn, LTV, and a plain-English read. No account, no key.
Do I have to connect Stripe?
No. You bring the numbers you already have; it does the math client-side.
Will it store my data?
No. It runs in your browser; nothing is uploaded.
Author's Process
This product was built with AI coding tools. The real feature was resisting dashboards and keeping it to one paste and one read.
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