Your question: Can you develop demo app using app inventor? I need app which can measure PPG and SCG using smart phone for collecting the measurement.

SOLVED ANSWER WITH STEP-BY-STEP EXPLANATION

Here is a quick guide on how to develop a basic demo app using MIT App Inventor that collects PPG (Photoplethysmogram) and SCG (Seismocardiogram) measurements from a smartphone. However, please note that building a complete and accurate medical-grade app requires advanced knowledge, regulatory compliance, and thorough testing, which goes beyond the scope of this demo. The following steps outline a basic implementation of data collection:

Step 2: Design the User Interface

1. Drag and drop the following components onto the screen:

2. Use the "Clock" component to collect data at a specific interval.

Step 4: Data Collection

2. • Access the device's accelerometer sensor to measure the vibrations caused by the heartbeat. To do this, use the Sensor component in App Inventor to get accelerometer readings at regular intervals (e.g., every few milliseconds).

   • Perform some signal processing on the accelerometer data to extract the SCG waveform.

2. Test the app's functionality to ensure it captures PPG and SCG data correctly.

Remember, this is just a basic demonstration app, and the accuracy and reliability of PPG and SCG measurements may not be suitable for any medical or research purposes. Additionally, developing a full-fledged medical app requires compliance with medical regulations and rigorous testing to ensure safety and accuracy.

I just want to use it to take measurements in form of cvs from the apps

SOLVED ANSWER WITH STEP-BY-STEP EXPLANATION

3. Click on "Start New Project" to create a new app.

Step 2: Design the User Interface

Step 3: Add Functionality to the App

1. In the "Blocks" section, use the blocks editor to add functionality to the buttons and the ListPicker.

2. For SCG Measurement:

   • Access the device's accelerometer sensor to measure the vibrations caused by the heartbeat. Use the Sensor component in App Inventor to get accelerometer readings at regular intervals (e.g., every few milliseconds).

Step 5: Testing

1. Install the app on a compatible Android smartphone.