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

# Introduction

![](https://2838804616-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MKEO4zp3J-ppXx4d1Ov%2F-MKEe76RB9SIEORId1Cy%2F-MKEeC6d_o4z1KNfERvo%2FIcon-2.png?alt=media\&token=04cd8fda-3142-427c-94bb-c577bb144460)

## OLO UI Theme App

Based on [React Native](https://github.com/facebook/react-native) and [Expo](https://expo.io), we offer you OLO listing UI Theme App; a well structured iOS and Android, having fully customizable pages along-with a rich collection of UI elements specifically for an ideal listing app to help you quickly get started on your next project.

[Expo](https://expo.io/) is used to make react native applications. It provides a set of tools that simplify the development and testing of React Native app and arms you with the components of users interface and services that are usually available in third-party native React Native components. With Expo you can find all of them in Expo SDK.

[**OLO**](/olo/customer-app/introduction.md) listing UI theme App is a bold and flexible [React Native](https://github.com/facebook/react-native) theme best suited for developing high-quality mobile apps that makes use of ready-made tools. The theme has several widget areas that allows you to extend your theme functionality with plugins. This gives your app a consistent look and feel with the rest of the platform ecosystem, and keeps the quality bar high.

[**OLO**](/olo/customer-app/introduction.md) is build using [Expo](https://expo.io/) it is powered with  [Expo SDK](https://docs.expo.io/versions/latest/sdk/overview/) to give you access to your device capabilities and the Expo services to handle the heavy lifting of building your app binary and uploading it to the store, all without you touching Xcode or Android Studio. With the "bare" workflow, we also speed up your development with the [Expo SDK](https://docs.expo.io/versions/latest/sdk/overview/) and React Native, and you have full control over your iOS and Android projects.