A healthy dose of power is what Tiger app needs to be running well. You may need to replace your phone within the next year or two, as it mostly means you are able to use any old phone or tablet in your pocket. Best with Android 6.0 and up, with at least 2GB of RAM.
It depends on the device spec you can check your device specs by navigating to Settings => About Phone. If your machine is old enough, Tiger app will install, but maybe crash all the time, or run like a snail on morphine. So you'd have to run Tiger on another box, or get an upgrade.