ActiveConnex is the one of the big product I have ever worked. It consists of a suite of software solutions to help the clients manage large outdoor event operations, such as tracking of vehicles, people and assets, monitoring security of access, checking quality of installation etc. This gives Event organisers real-time information on their event operations as it happens, providing greater security, visibility and accountability.
Each module has separate Android App and each app developed in Java. By the time each app migrated and used to Kotlin with latest technology and best application architecture.
Below is the link of Google Play Store where you find more details
https://play.google.com/store/apps/developer?id=ActiveConnex
Android
Java
Kotlin
Retrofit