[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [local‑first/Owner](https://evolu.dev/docs/api-reference/common/local-first/Owner) › createAppOwner

```ts
function createAppOwner(
  secret: Uint8Array<ArrayBufferLike> &
    Brand<"Entropy"> &
    Brand<"Length32"> &
    Brand<"OwnerSecret">,
): AppOwner;
```

Defined in: [packages/common/src/local-first/Owner.ts:223](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/local-first/Owner.ts#L223)

Creates an [AppOwner](https://evolu.dev/docs/api-reference/common/local-first/Owner/interfaces/AppOwner) from an [OwnerSecret](https://evolu.dev/docs/api-reference/common/local-first/Owner/variables/OwnerSecret).