AapkiApp 'Preview app' allows you to check your demo app using the specific app code for your app. After you have created your app using appkiapp.in, you shall find a QR Code/ a quick link to download the demo app on your phone under 'Preview' Section. Once the demo app is downloaded to your phone, use the app code provided in the preview section for your app.
This shall allow you to view your app directly on your mobile device like the real time app. Make changes in your app on appkiapp.in back-end (website) and see all changes in this preview app immediately.