# Invalid package name

### Why is my package name or bundle ID invalid?

Your package name (for Android) or bundle ID (for iOS) may show as invalid if it doesn’t follow the correct format required by the app stores.

#### Things to check

* Start with a letter.
* Use only letters, numbers, and underscores.
* Separate each part with a period (for example, **com.example.app**).
* Avoid spaces or special characters.

{% hint style="danger" %}
Following this format will ensure your package name or bundle ID is accepted for both Android and iOS apps.
{% endhint %}


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