This 'cardputer' sits between the Raspberry Pi and Flipper Zero - but it's uniquely...

ZDNET's recommendations are based on many hours of testing, research, and comparison shopping. We gather data from the best available sources, including vendor and retailer listings as well as other relevant and independent reviews sites. And we pore over customer reviews to find out what matters to real people who already own and use the products and services we’re assessing. ZDNET's editorial team writes on behalf of you, our reader. Our goal is to deliver the most accurate information and the most knowledgeable advice possible in order to help you make smarter buying decisions on tech gear and a wide array of products and services. Our editors thoroughly review and fact-check every article to ensure that our content meets the highest standards. If we have made an error or published misleading information, we will correct or clarify the article. If you see inaccuracies in our content, please report the mistake via this form. Written by Adrian Kingsley-Hughes, Senior Contributing EditorSenior Contributing Editor May 3, 2026 at 5:00 p.m. PT M5Stack Cardputer Adv 4 / 5 Very good pros and cons Pros Neat, well-made, and portable.Has a large, active support and development community.Very competitively priced. Cons Quite a steep learning curve.Limitations compared to the Raspberry Pi or Flipper Zero. $41.9 at Amazon Follow ZDNET: Add us as a preferred source on Google. Mention a computer you can fit into your pocket, and people seem to have one of two reactions