> For the complete documentation index, see [llms.txt](https://stealf-fi.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://stealf-fi.gitbook.io/docs/the-stealf-app/overview.md).

# Overview

Stealf is built on top of [Umbra Privacy](https://docs.umbraprivacy.com/docs/introduction), a privacy layer on Solana powered by Arcium's MPC network.

#### Three pillars, one app

**Privacy.** Privacy you don't have to think about. Shield any asset, send privately, choose what the world sees. Powered by Umbra.

**Spend.** Make privacy something you use daily. A Visa card and a bank account, so you spend from a balance nobody sees. 🚧 Card issuance is in progress and will roll out after the beta.

**Earn & Invest.** Your funds keep working. Swap into xStocks or stake with Jito (JitoSOL) directly from the app. 🚧 Investment positions are currently public onchain; private yield is on the roadmap.

<figure><img src="https://572777082-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9bLj2UBxhMprypevNol9%2Fuploads%2FjHuxF16C2TG2SobVmQoQ%2FComponent%2010.png?alt=media&amp;token=e38583b2-50ab-4fae-b548-5aeea16aeb13" alt=""><figcaption></figcaption></figure>

Your keys are secured by [Turnkey](https://www.turnkey.com/), a secure wallet infrastructure.


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