In this instructable, you'll learn how to create iPhone mockups to promote your app, without the need of Photoshop or any software.
First, visit Placeit.net.
Step 1: Use the Filter to Find a Mockup Template
On the left, you'll find a filter menu to select the categories you need. In this case, we selected still shots (mockups) and iPhone 6.
Step 2: Select a Mockup Template
Then, select the mockup template that you like the most.
Step 3: Upload Your Image or Grab From a URL
You can then upload a screenshot of your app (taken on your iPhone by pressing the Home and Power buttons at the same time) or you can use a URL to take a screenshot from a website's mobile version.
Step 4: Download Your Image
You can then download your image easily or add effects.