This is the Gripsner: an iPhone compatible hand grip strengthener that doubles as a controller for games and YouTube shorts. It has up to 30lbs of resistance to work your hands hard. You can also use this for stress relief. The companion app gives you access to 3 training modes, including free jump, time and counting mode. There are 5 games for you to play that make grip exercises more fun.
Gripsner is also a controller. You can squeeze it to go through YouTube shorts. You can also decrease the volume of your video by a quick press of a key. This smart gadget works with the camera app on your phone. The battery lasts up to 300 hours.
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