Hi Thunkers 
With the introduction of responsive web apps, you can now:
- View your app on many different device screens
- Create your own iOS screenshots!
To begin with, here is a list of screenshot sizes you need to publish to the App Store.
You can now create all screenshots necessary with Thunkable X!
1. Preview your app on different sized device screens:
First, publish your app as responsive web app.
Open the link in Google Chrome.
Click Settings > More Tools > Developer Tools to view app in Developer mode.
You want the console window to be on the side of the screen.
If it is on the bottom of the screen, click the three dots on the upper right corner of the developer console and use the images next to the text âDock sideâ to move this window to one side of the screen
Your project should now look like this:
In the top left hand corner of the dock, click the icon that looks like a phone and a tablet standing next to each other
You will now see that your app looks like it is being viewed on a mobile device:
You can use the drop-down menus at the top of the screen to select different devices and screen orientation.
2. Create screenshots for this device:
Go back to the top left-hand corner of your console dock.
You will now see three dots to the left of the dock.
click on these three dots to open a menu, and click on âCapture Screenshotâ in the menu.
A screenshot in the resolution of your selected device will be saved to your computer!
Big thanks to @darren for highlighting this option!
3. Further information on required screenshot sizes
As stated above, here is a list of screenshot sizes you need to publish to the App Store.
To get all of the screenshot sizes you need, create screenshots using the following device settings. Each device name will be followed by its corresponding screen size in the screenshot doc linked above.
iPhone X (5.8 inch screenshots)*
iPhone 6/7/8 Plus (5.5 inch screenshots)
iPad Pro (12.9 inch screenshots - suitable for iPad Pro 3rd gen and iPad Pro 2nd gen screenshots described in doc)
*5.8 inch screenshots are used as an alternative to 6.5 inch screenshots. There are two ways to upload these iPhone X screenshots to your App Store listing:
Upload 5.8 inch screenshots in Media Manager
When you look at your screenshot upload window, you will see the text âView All Sizes in Media Managerâ. Click here. In the iOS tab, you will see a segment that says â6.5-inch displayâ. At the bottom of this segment you will see the text â5.8-inch displayâ. Next to this you will see a checkbox with the text âUse 6.5-inch Displayâ. Uncheck this box and expand the â5.8-inch Displayâ segment. Click on âChoose Fileâ, and upload your 5.8-inch screenshots.
Resize 5.8 inch screenshots to 6.5 inch screenshots
Use an image editor of your choice to resize your iPhone X screenshots from 1125 x 2436 pixels (5.8-inch Display) to 1242 x 2688 pixels (6.5-inch Display). Upload your new 6.5-inch screenshots to the App Store.
