Your users, new and returning
How many people came today, this week and this month, how many of them came back, and who is new. In your app by their user id, on your site by visitor, each one a click away with every visit they made.
Who keeps coming back
Today, 7 days, 30 days
Daily, weekly and monthly active people, each against the period before.
Stickiness
How many of the month's people come on an average day.
Came back today
Who returned today, and how many after a week or more away.
New and returning, day by day
A bar for each day, split into new and returning. Click one for that day's people.
Each person, every visit
A person's page has every visit they made, where each came from, what they did and what they paid.
Everywhere you look
On Visitors, the Overview, App users, in Ask and in the phone app.
Who counts as one person
The counts follow the id Sumly has for someone, so they are only as good as that id.
- In an appThe user id you give the SDK: the same person on two phones is one.
- On a siteThe visitor id, so one person on a laptop and a phone counts twice until they sign in.
- NamesCall sumly.identify after sign-in and people show by name, here and on their page.
- BotsNever counted: what the bot filter keeps out is not a person.
Questions about active users
What is stickiness?
Daily active people divided by monthly: the share of the month's people who come on an average day.
Where is retention?
On Visitors › Retention, linked from the active users block: each week's new people and how many came back in the weeks after.
Do I need the app SDK?
No. The site script gives you active visitors on your sites; the SDK adds the people in your app by their user id.
Can I ask for it in plain words?
Yes. Ask on the site answers it, and so do Claude, Claude Code and Codex over MCP.
Goes well with
Try it with your own projects
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Start free trialOr look around first: open the live demo.