Free tools and resources

1) Free mockup editor: https://mockups.pixeltrue.com/

2) Free simple screenshot creator with mockups: https://www.appstorescreenshot.com/

3) Free official Device art generator by Google: https://developer.android.com/distribute/marketing-tools/device-art-generator

Paid tools and resources

1) Paid screenshot creator with different mockups: https://appscreens.com/

By the way, more detailed instructions on how to use AppScreens software can be found here: https://help.gurucan.com/en/articles/5630197-how-to-create-screenshots-of-your-wl-app-using-appscreens-software

2) Paid screenshot creator with different mockups: https://hotpot.ai/app-store-screenshot-generator

3) Paid (it has a free option as well) screenshot creator with different mockups: https://previewed.app/

4) Paid screenshot creator with different mockups: https://theapplaunchpad.com/

5) Paid screenshot creator with different mockups: https://placeit.net/app-store-screenshot-generator?gclid=CjwKCAjwzOqKBhAWEiwArQGwaH1SRMQ-44tF8IkRm4QM-Unrr656tZkRpo2K4RoNSv0-Jts-pft1uRoCZBUQAvD_BwE

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