If the app isn't supposed to work i.e supported by your device and because i didn't spoon fed you the link that makes me senseless ?Don't show tantrum just because things didn't work out your way. Be mature.
I can't help with the Bixby thing as its not available for this budget but the Gemini thing, you can download onehandoperation+ by Samsung to set gestures as i did for my use needs.Also you can map double press the power button to access Gemini if yo...