> For the complete documentation index, see [llms.txt](https://docs.spindl.xyz/spindl/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.spindl.xyz/spindl/techncial/javascript-sdk-html-script-guide/default-vs-lite-sdk-versions.md).

# Default vs Lite SDK Versions

The Spindl SDK is available in two privacy modes:

* **Default**: The default Spindl SDK behaves the same exact same way as other major analytics providers, whether Google Analytics, Twitter, or large attribution platforms like Branch or AppsFlyer: a combination of cookies and calculated device identifiers roughly unify a user journey across many different apps and experiences.
* **Lite**: In our ‘privacy safe’ version, we intentionally assign a transient device identifier to any Web 2 user touchpoint, refreshing the pseudonym regularly and essentially deleting any persistent data about that device. This is how Plausible and other privacy-aware services popular among some Web 3 projects work.

Both SDKs have the same API, and can be substituted between each other. The only difference is which package to install and import.

{% hint style="info" %}
Unsure which model to choose? Reach out and we can help you find the right solution for your app and your customers.
{% endhint %}