Simple plugin to add image zooming-in and zooming-out feature. Below steps enable image zooming for your app users.
1. Admin > Settings > Image Zoom.
2. Click on 'Enable Image Zoom' and save the settings.
Once this plugin is enabled, you can zoom-in on an image by clicking on it and then pinching and spreading (outward). To zoom-out just click on the image and pinch (inward).