Required no assembly. But I couldn't get it to turn on. I was starting to question if it was true that I could use it without the App. Then I googled issues with starting this machine and found this angel:
tangytonight
"In case anyone is having an issue where your walking pad powers on but won't start and just screams at you with the high-pitched beeping every time you press your remote, I have a potential solution. Deerun customer service says:
Turn on the treadmill, take out the remote control
Press the deceleration button (minus) three times (short presses).
Press the acceleration button (plus) once (short press).
Press and hold the acceleration button (plus) for two seconds.
When you hear a long beep, the activation is successful. Then, press the middle button to check if the machine responds. (Mine didn't do the long beep, but it worked anyway).
That should help, hopefully. I tried everything else in this thread but when it didn't work, this did. They tried to steer me to the PitPat app first, which, pass. Good luck!"