The Mekari POS app runs on the Android operating system. You can easily install it through the Play Store app. Here are the steps:

1. Open the Play Store app on your Android device.
2. Then search for  “Mekari POS” in the search bar.
   
3. Click “Install” to install the Mekari POS app on your device.
   
4. Once the installation process is complete, the Mekari POS app will be installed on your device.
   

That concludes the explanation of how to download the Mekari POS app.