Hi everyone :wave: I recently open-sourced a Kotl...

# multiplatform

[Abraham Golor]

Hi everyone 👋

I recently open-sourced a Kotlin Multiplatform library called phonenumber for phone number validation and formatting across Android and iOS.

Why I built it:
While working on a KMP app, I found myself duplicating phone number validation logic across Android and iOS. Android had libphonenumber, iOS had PhoneNumberKit, and keeping behavior consistent between both platforms became messy.
So I built a shared KMP wrapper that exposes a single API while delegating to each platform’s native implementation.

Features:

- Global phone number validation
- Validation by country ISO code
- Validation by country calling code
- Format to E.164
- Format to international format
- Extract region code
- Extract country calling code
- Shared API for Android & iOS
- Native performance (libphonenumber on Android, PhoneNumberKit on iOS)

GitHub: https://github.com/ajayinnovations/phonenumber

Would love feedback on the API design, naming, and any edge cases I might have missed 🙏

[Tgo1014]

Sounds very nice! I got curious why just Android and iOS but not the other kmp platforms? 🤔

[Tgo1014]

Ahh ok, found the reason in the readme 😄

• Androiduses Google's`libphonenumber`

• iOSuses`PhoneNumberKit`through a wrapper bridge

[Abraham Golor]

Yes, I will be adding more platforms too. Thanks for checking it out ☺️

[Abraham Golor]

Oh you I got confused by your message. Now I know I will do better next time