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A1 SD Bench

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A1 SD Bench is a free mobile app for testing sd cards performance. It determines the class of your device (depending on its actual speed) and shows its reading / writing speed in MB.

A1 SD Bench supports Internal memory, Internal/External SD cards (built-in, SD, Micro SD, SDHC and SDXC), usb sticks and even external HDD connected to a phone via USB.

A1 SD Bench - sd card speed class checker

4 micro sd speed tests are available for checking the speed of reading / writing: Quick, Longer, Accurate and Random I/O. You can test one or more sd cards and compare their or other memory cards results.

Benchmarking results can be compared with the characteristics of other memory cards; all charts are available through a special online service.

We suggest disabling unnecessary apps for successful and verifiable reading speed testing. At the same time, A1 SD Bench doesn't have a significant impact on Android OS functionality.

Download A1 SD Bench

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I'm Vladimir, your guide in the expansive world of technology journalism, with a special focus on GPS technologies and mapping. My journey in this field extends over twenty fruitful years, fueled by a profound passion for technology and an insatiable curiosity to explore its frontiers.