# Cost per install (CPI)

Advertising cost divided by attributed app installs, or a price charged for each eligible install.

Advertising cost divided by attributed app installs, or a price charged for each eligible install.

## An example

Spending $200 for 100 attributed installs produces a measured CPI of $2.

## Why it matters

Cheap installs may not become active or paying users; inspect retention and fraud as well.


## Related terms
- [Attribution](https://jolts.xyz/resources/glossary/attribution)
- [Attribution window](https://jolts.xyz/resources/glossary/attribution-window)
- [Conversion](https://jolts.xyz/resources/glossary/conversion)
- [Conversion tracking](https://jolts.xyz/resources/glossary/conversion-tracking)

## Next step

[Explore advertising](https://jolts.xyz/advertisers) or [monetize your AI app](https://jolts.xyz/publishers).