What is the difference between Android and iOS rules?

Android package segments must be valid Java identifiers (letters, digits and underscores, not starting with a digit) and cannot be Java keywords. iOS bundle IDs allow letters, digits and hyphens.

How many segments do I need?

At least two, such as com.example, but three like com.example.app is the common convention.

Does a valid result guarantee it is available?

No. It checks the format only. Availability on the App Store or Play Console is separate and depends on whether the ID is already taken.

Developer Tools

Bundle ID / Package Name Validator

Validate iOS bundle identifiers and Android package names.

Free foreverRuns in your browserNo sign-up

Package name

Valid Android package name with 3 segments.

Reverse-DNS style, for example com.company.app. Android segments follow Java package rules; iOS allows hyphens.

About the Bundle ID / Package Name Validator

iOS apps use a bundle identifier and Android apps use a package name, both in reverse-DNS form like com.company.app. Small mistakes cause build or upload failures.

This tool checks that your identifier has at least two segments and that each segment follows the rules for the platform you choose.

For Android it applies Java package rules; for iOS it allows hyphens.

Key features

Android package and iOS bundle ID modes
Checks segment count and characters
Flags reserved Java keywords for Android
Clear, specific error messages

How to use

1Choose Android or iOS.
2Enter the identifier.
3Read the validation result and fix any issues.

Examples

Valid package

Input: com.example.myapp

Output: Valid with 3 segments

Reverse-DNS form with letters-only segments passes for both platforms.

Frequently asked questions

What is the difference between Android and iOS rules?: Android package segments must be valid Java identifiers (letters, digits and underscores, not starting with a digit) and cannot be Java keywords. iOS bundle IDs allow letters, digits and hyphens.
How many segments do I need?: At least two, such as com.example, but three like com.example.app is the common convention.
Does a valid result guarantee it is available?: No. It checks the format only. Availability on the App Store or Play Console is separate and depends on whether the ID is already taken.