You will have to identify what you consider syncing something to something. What signals would provide the syncing information for each piece of the project?
Here are some specific questions to clarify what you really want.
Do you mean a ready to install app that enables to remotely control the dc motor and the servos like
in the app:
switch on dc motor
switch off dc motor
turn servohorn to a certain angle?
with what kind of technology shall the app and the Ardunio Uno be connected to each other?
serial interface?
bluetooth?
WiFi?
LAN?
I'm pretty sure that you agree and will follow the way how to solve your problem mimimum 200 minutes faster.
This requires to invest 20 minutes of your precious time to read how to speedup solving your problems.
Directly after registering you got presented informations how to speed up solving your problem.
You should really read it.
Preferably a ready to install which is connected to the arduino with bluetooth, the app will control the dc motor to rotate either clockwise or counterclockwise