Follow ZDNET: Add us as a preferred source on Google.The summer season is one of my favorite times of year to make practical purchases that can upgrade your everyday routine. And bigger doesn't always mean better -- especially when it comes to tech. Some of our favorite gadgets can fit right inside your back pocket, making them easy to integrate into your lifestyle and take with you wherever you go. Also: June Prime Day live blog 2026: We're tracking Amazon deals on SSDs, TVs, laptops and moreFrom Bluetooth trackers and accessories to cables and more, there's a lot of tiny tech to consider. Reviewers at ZDNET have tested more than a few of these mighty yet miniature options, including our in-house gadgeteer, Adrian Kingsley-Hughes, and me. These are some of our favorite pocket-sized gadgets that you can shop right now -- and a few of these items are discounted for Amazon Prime Day. Find more Prime Day dealsThe best pocket-sized gadgets to shop now This gadget isn't for your pockets, but it is pocket-sized. The She's Birdie is a personal safety alarm with a wildly loud siren built-in. I've carried this on my keychain for almost 7 years, and it's a great investment for college students, parents with small children, older adults, and more, but for about $30, I recommend everyone scoop one up. When the top pin of the Birdie is pulled out, a 130db siren sounds and a strobe light flashes for up to 40 minutes. To put that in perspective, a 130db sound is equivalent to a jackhammer and nearly equal to the sound of a jet engine in the distance, according to the Hearing Health Foundation. Also: My favorite personal safety alarm is as loud as a jackhammer