My name is Mo the creator of appicon.co I’m sure some of you have you used it once or twice. Source: over 1 year ago

You can use something like https://appicon.co to create them all from a 1024x1024 then drop the entire folder into your project. Source: over 1 year ago

App Icon Generator can be used for generating the images. Downloaded images should be stored in mipmap (android/app/src/main/res/mipmap-*hdpi/ic_launcher.png) folders. - Source: dev.to / over 1 year ago

There are a lot of icon generation websites like https://appicon.co you can restrict the size with constraints and set the content mode to aspect fit. Source: almost 2 years ago

Generate the pack of icons for Android and iOS here and unpack it. - Source: dev.to / almost 2 years ago

Not OP, but have a look at [0]. It’s not great, but good enough. I regularly use it for App Store screenshots with captions and text. [0] https://theapplaunchpad.com/. - Source: Hacker News / about 1 year ago

For an advanced approach that includes localizations of your text and a ton of included resources to build your designs off of, there is AppLaunchPad (which has both a screenshot version and a mockup version with free and pay-by-the-month options), there is Vernissage which has a free and a pretty cheap pro version, and then there's App-Mockup which is free web-app. Source: almost 2 years ago

I used this. Paid for one month and got a good use out of it. https://theapplaunchpad.com. Source: over 2 years ago

I used AppLaunchPad. It’s a paid service but you can go monthly for single months when you need it (US$ 29). And you can easily wrap device frames for different size and colors of iPhone and iPad around the standard screenshots that you supply. Source: almost 3 years ago