data/develop/concepts/app-design/_index.md

---
title: App design concepts and considerations
slug: /develop/concepts/design
---

# App design concepts and considerations

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<RefCard href="/develop/concepts/design/animate">

<h5>Animate and update elements</h5>

Understand how to create dynamic, animated content or update elements without rerunning your app.

</RefCard>

<RefCard href="/develop/concepts/design/buttons">

<h5>Button behavior and examples</h5>

Understand how buttons work with explanations and examples to avoid common mistakes.

</RefCard>

<RefCard href="/develop/concepts/design/dataframes">

<h5>Dataframes</h5>

Dataframes are a great way to display and edit data in a tabular format. Understand the UI and options available in Streamlit.

</RefCard>

<RefCard href="/develop/concepts/design/custom-classes">

<h5>Using custom Python classes in your Streamlit app</h5>

Understand the impact of defining your own Python classes within Streamlit's rerun model.

</RefCard>

<RefCard href="/develop/concepts/design/timezone-handling">

<h5>Working with timezones</h5>

Understand how to localize time to your users.

</RefCard>

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