Exactly what I have done. Use an extra galaxy tablet I have on the tripod. Saw too many poor reviews of the strikeman app...Honestly,,, you get a laser round for 79-99 dollars.
The strikeman app is buggy,, making it quite useless.
The sound worked ~20% of the time, The app responded to 50% of the laser shots,, then registered phantom shot after phantom shot. The app hangs and needs to be reset, etc.
I ended up downloading the free "Itarget" App ,, and the free targets from their web site.
Printed out the I-target "target" and used the phone stand and target holder from the Strikeman kit.
World of difference, The I-target app has more features and controls,, and worked without a hickup.
If I did it again,, I would order a 9mm laser round from ebay or amazon,, a decent camera tripod, and tape the target to the wall. And have a much better system for under 50-60 bucks