Tag Archives: Benchmark

A1 SD Bench v2.0.0 released

A1 SD bench logo

A new version of SD Bench is available for download in Google Play Store. This is a major release with two new benchmarks added — Accurate and Random I/O. Both are two step benchmarks and require reboot to clear Android SD card / disk cache. Many fixes and tweaks are also available.

New in v2.0.0:

  • Accurate benchmark
  • Random I/O benchmark, with 4KB blocks
  • Long press on each item for more options
  • Fixed: On some very fast devices benchmark was slightly incorrect
  • Fixed: Number thousand separators for some devices
  • Improved: Detects about 1,000 phone & tablet models
  • Improved: Detects even more USB and SD card locations
  • Improved: Rearranged settings + new items added
  • Improved: Added non-standard media permissions
  • Improved: UI fixes and minor tweaks


A1 SD Bench v1.0.0 available

As of today the A1 SD Bench v1.0.0 is available at Google Play. Use A1 SD Bench – free tool to benchmark your phone & tablet SD cards, RAM and memory, to test IO read / write speed and media performance, and compare your benchmark results online. All devices with Android 2.2 and above are supported.


  • Free, and without Ads
  • Built-in compare results online (anonymous)
  • Speed test any Android storage including RAM and USB
  • Nice looking, clean, fast, responsive & intuitive UI (User Interface)
  • Measure both read and write speeds to find out how fast is your SD card
  • Quick and Accurate benchmark (to reduce caching effects)
  • Check your speed-test results with other devices
  • Speed categories: Class 2 .. Class 10, UHS-I & UHS-II
  • Custom location option to test any device directory

Supported devices:

  • Internal memory
  • Internal SD cards
  • External SD cards
  • System RAM (Random access memory)
  • USB flash drives (including, NAND flash, USB 1.0, USB 2.0, USB 3.0)
  • USB HDD (Hard drives)

Supported memory cards:

  • SD Cards
  • Micro SD
  • Micro SDHC
  • Micro SDXC
  • Phone’s built-in memory (card)
  • Notes: http://a1dev.com/sd-bench/notes/