Not receiving data to the app

hi,
Ive build an app using MIT app inventor for push up project. for the project Im using arduino uno, HC-06 Bluetooth & ultrasonic sensor HC-SR04
the app is successfully is connected to arduino but not receiving data and the counter is not changing.
I`ve tried

MIT app code

arduino code:

#include <SoftwareSerial.h>

#define echoPin 2 // Echo Pin
#define trigPin 3 // Trigger Pin
int vibePin = 4; // Vibrabion Pin
SoftwareSerial BT(0, 1); // RX, TX Bluetooth
int BTdata = 0 ; // app variable
long duration, distance; // distance variables
boolean trigUp = false; // upper body trigger
boolean trigDown = false; // lower body trigger
float Cnt=0; // Push Up counter
unsigned long start, finished, elapsed; // variables used on more than 1 function need to be declared here

void setup() {
pinMode(echoPin, INPUT);
pinMode(trigPin, OUTPUT);
pinMode(vibePin, OUTPUT);
digitalWrite(vibePin, LOW); //vibration off
BT.begin(9600); // Default communication rate of the Bluetooth module
}
void Pushup()
{
while (BTdata == '1')
{
digitalWrite(trigPin,LOW);
delayMicroseconds(2);
digitalWrite(trigPin,HIGH);
delayMicroseconds(10);
digitalWrite(trigPin,LOW);
duration = pulseIn(echoPin,HIGH); // receive, convert time (us) to cm
distance = duration * 0.034/2;
if (distance >= 30 && distance <=45) //upper body trigger
{
trigUp = true;
delay(1000);
digitalWrite(trigPin,LOW);
delayMicroseconds(2);
digitalWrite(trigPin,HIGH);
delayMicroseconds(10);
digitalWrite(trigPin,LOW);
duration = pulseIn(echoPin,HIGH); // receive, convert time (us) to cm
distance = duration * 0.034/2;
if (distance >= 10 && distance <=20) // lower body trigger
{
trigDown = true;
}
else if (distance < 10 || distance > 45) //vibration trigger
{
digitalWrite(vibePin,HIGH);
}
if (trigUp == true && trigDown == true)
{
Cnt = Cnt +1;
trigUp = false;
trigDown = false;
}
Serial.print(Cnt);
BTdata == BT.read();
if (BTdata == '0');
{
exit;
}
}
BTdata == BT.read();
if (BTdata == '3')
{
Cnt = 0;
Serial.print(Cnt);
}
}
}

The easier you make it to read and copy your code the more likely it is that you will get help

Please follow the advice given in the link below when posting code , use code tags and post the code here

SoftwareSerial BT(0, 1); // RX, TX Bluetooth

Do not use pins 0 and 1 with SoftwareSerial as they are used by the hardware Serial interface. Move the Bluetooth to different pins