# WebViewer Communication Works in Thunkable Live but Fails in Compiled APK

**URL:** https://community.thunkable.com/t/webviewer-communication-works-in-thunkable-live-but-fails-in-compiled-apk/3692219
**Category:** Issues / Bugs
**Tags:** webviewer, help
**Created:** [March 26, 2025, 10:49pm UTC](https://community.thunkable.com/t/webviewer-communication-works-in-thunkable-live-but-fails-in-compiled-apk/3692219 "2025-03-26T22:49:40Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![cuchii](https://avatars.discourse-cdn.com/v4/letter/c/b2d939/32.png) [@cuchii](https://community.thunkable.com/u/cuchii)
#### Post date: [March 26, 2025, 10:49pm UTC](https://community.thunkable.com/t/webviewer-communication-works-in-thunkable-live-but-fails-in-compiled-apk/3692219/1 "2025-03-26T22:49:40Z")

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Hello, I am developing a vacation management system that includes a calendar. The calendar is displayed in a WebViewer inside Thunkable, and it communicates with the app using the ThunkableWebviewerExtension.

The problem is that in the compiled version (APK/IPA), the WebViewer does not receive messages from Thunkable, or it fails to send messages back. However, everything works perfectly in the Thunkable Live Test.

Here is the code I am using for the webpage:  
[GitHub Link](https://github.com/Cuchillos/calendar/blob/main/calendar.html)

Has anyone encountered a similar issue? How can I ensure reliable communication between the WebViewer and Thunkable on both Android and iOS?

Thank you in advance!