Keep cohort membership and observation age consistent before retention rates are compared. The download provides a specific review process. It does not make decisions or act in an account.
Download the free skill
One complete Markdown file. No subscription, checkout or fabricated setup files.
Download SKILL.mdWhat to provide
Permitted cohort export, signup/event dates, activity definition, observation window and exclusions.
How it works
- Fix cohort membership at the start and document the retention event.
- Compare cohorts at the same observation age; a fresh cohort has no mature month 3 rate yet.
- Calculate retained members over eligible original members, preserving exclusions and missing events.
- Return counts and gaps, not causal claims or automatic product changes.
The output
cohort | eligible start | age | retained | rate | missing exposure | interpretation
Worked fictional example
Fictional cohort A: 100 starters, 40 active at month 2 = 40%. Cohort B: 50 starters with only month 1 exposure; month 2 unknown, not 0%.
Checks and limits
Preserve source versions and original values. Unknowns stay unknown. Use a qualified reviewer for regulated, legal or hiring decisions. No send, share, account change, schedule, ledger update or payment is authorized. No live account test is claimed.
More founders workflows · How-to guides
Method: reviewed source. Demand lead: GSC dataagentfounders1,investor19;distinctfromexperimentcloseout. These are site-query cluster impressions and method evidence, not exact new-topic monthly search volume or a traffic promise. Checked October 2, 2026.