Use APKPure App
Get nIR old version APK for Android
DSLR trasmettitore infrarosso per Nikon
Works similar to a Nikon ML-L3 on phones that have an infrared blaster.
Includes a widget with the same functionality as the remote app.
Be sure to set either Delayed remote or Quick-response remote release mode on the camera.
Tested using a Nikon 3200 and Samsung S4.