# Statistics

> How many devices use your subscriptions: in total, active in the last 30 days, by system and by month.

Cabinet → “Overview”:

- devices in total and active in the last 30 days (inactive = total − active), by system;
- by month (up to 24): new devices and active ones, by system.

Cabinet → “Devices”: a list of devices with a filter by system and activity: the identifier, the system and its
version, the FlowLock version, when the device first appeared and when it last checked in.

## What counts as a device

A device is one FlowLock installation with your verified subscription. The app checks in as soon as the subscription
gets your ID, and after that at most once a day, after a subscription refresh.

The device identifier:

- **HWID**: if the person turned on “Send HWID” (or the subscription requires the HWID). It is the same HWID your
  panel gets in the `x-hwid` header.
- **Alias**: otherwise. It stays the same for the pair “device + your cabinet” and is linked to nothing else.

If a person turns “Send HWID” on or off, their device appears again under a different identifier, and the old record
drops out of the active ones after 30 days.

## What the statistics don't include

Devices where the person turned off “Tell the provider I'm connected”, and subscriptions without an ID or from an
unverified domain. IP addresses, countries, sites and traffic are never in the statistics, see
[“Privacy”](https://flowlock.cc/en/docs/privacy.md).

A device that stops checking in is deleted after 180 days; monthly statistics are kept for 24 months. Up to 500,000
devices per cabinet in the statistics.