Jump heights are different on different devices

I'm creating a simple 3D game where the user touches the screen and it causes the character to jump. I've been testing on an android HTC One with a res of 1920 x 1080. Everything works fine. I've made adjustments so that the character jumps to the right height. But, when testing on lower resolution android phones and even iphones, the character jumps a lot higher. Is there a way to determine the correct force to apply for different screen resolutions? And I'm assuming its because the resolution here.

Here is my code:

 void Update () {
         
         if(touchingPlatform){
             
             if(Input.GetButtonDown("Jump")){
                 rigidbody.AddForce(jumpVelocity, ForceMode.VelocityChange);
                 this.GetComponent<AudioSource>().Play();
                 
             }
         
             if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began) {
                 rigidbody.AddForce(jumpVelocity, ForceMode.VelocityChange);
                 this.GetComponent<AudioSource>().Play();
             }
             
             if (Input.GetKeyDown(KeyCode.Escape)) { Application.Quit(); }
         }
 }

and in my fixedUpdate I have this:

 void FixedUpdate () {
         // continously move
         transform.Translate(moveSpeed * Time.deltaTime, 0f, 0f);

}

Thanks