Android APK Multi-Account Cloning - Android APK Modification – Add Multi-Account Management (Multiple Accounts Support)

I need to edit / upgrade a free android apk from google playstore ! The android apk is on spanish only available for spanish people. we can download . The APK name is https://www.mitiklive.com/ can be downloaded from google playstore ... (Budget: €30 - €250 EUR, Jobs: Android, Android App Development, Android SDK, Android Studio, iPhone, Java, JavaScript, Kotlin, Mobile App Development)