If you are looking for the official and most secure version of the app, you can find it through verified platforms:
Downloading a "cracked" or "crk" APK version of —a medical decision support app—is generally not recommended. Using modified APKs from unofficial sources can expose your device to malware, security vulnerabilities, and data privacy risks. Download Whitebook crk apk
For iOS users, the app is available on the Apple App Store. If you are looking for the official and