A1 SD Bench

A1 SD Bench

100,000 - 500,000 downloads

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*** IMPORTANT - If your SD card is not detected, please send us your model and SD card location, before giving a rating. We can not test this app on all devices ***

Use A1 SD Bench - free tool to benchmark your phone & tablet SD card, RAM and memory, to test IO read / write speed (Quick, Long, Random I/O and Accurate) and check media performance, and compare your benchmark results online.

★ Free, and without Ads
★ Four benchmark modes - Quick, Longer, Accurate and Random I/O
★ Built-in compare results online (anonymous)
★ Built-in view statistics online
★ SD card speed test, or multiple SD cards
★ 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 4, Class 6, Class 10, UHS-I, UHS-II and UHS-III
★ Custom location option to test any device directory
★ Shows total and free memory for all media including RAM

Supported devices:
• Internal memory
• Internal SD cards
• External SD cards
• System RAM (Random access memory)
• USB flash drive (including, NAND flash, USB 1.0, USB 2.0, USB 3.0)
• Up to 6 USB flash drives (connected simultaneously via USB hub)
• USB HDD (Hard drives)

Supported memory cards:
• SD Cards
• Micro SD
• Micro SDHC
• Micro SDXC
• Phone's built-in memory (card)

• Problem? Please, send us your feedback using Send Feedback feature from the Settings screen, or http://a1dev.com/feedback/
• We can not test all Android devices, so if your device's memory / SD card / USB is not detected correctly, use Send Feedback feature from the Settings screen, specifying path to your storage, e.g. /mnt/sdcard/, /mnt/usb_drive;
• NTFS and other non-native file systems is supported as far as your Android device is compatible with a such FS.
• Your device needs enough free (100 MB and up, depending on media speed, and up to few GB if using longer test option) space for benchmarks to work;
• More: http://a1dev.com/sd-bench/notes/

• From the application itself

• Google+: http://a1dev.com/g+

More info on permissions:
• "Storage" & "Media" is used to benchmark your device storage, SD cards and USB attached drives.
• "Internet" is used to access and submit online scores and for anonymous usage statistics (both can be enabled and disabled).

Tags: a1 sd bench, a1sd, hinzufügen phone a1.

Recently changed in this version

• New: Initial support for "Android L (Preview)"; fixes FC
• Fixed: Custom location enabling/disabling caused false UI glitch
• Improved: Supports many more USB and OTG devices
• Improved: Added G.Skill SD cards
• Improved: More devices are recognized
• Improved: Misc improvements
• Changed: Internal and External cards are shown simply as SD Card (there is no official API to correctly detect them. Our guess was not always right)

Comments and ratings for A1 SD Bench
  • (69 stars)

    by Abdul-Kabir Alegbe on 15/08/2014

    Gives details.

  • (69 stars)

    by John Lane on 07/08/2014

    Wow, great app.

  • (69 stars)

    by Tamas Ujszaszi on 06/08/2014

  • (69 stars)

    by Kent Solid on 06/08/2014

    This app mistakenly detect ext sd card as int sd card, and vice versa.That knocks 1 star

  • (69 stars)

    by Ashish Singh on 06/08/2014

    Good one. Better than all the others i tried to use.

  • (69 stars)

    by Anthony Myrie on 03/08/2014

    The app really helps me measure the I/O readings on my SD Card/Ram and Internal Nand flash memory. This is a very useful app and helps greatly with conducting Diagnotsics.

  • (69 stars)

    by Andy Hon on 01/08/2014

    Not well on Samsung Galaxy Note 2 N7100 with Android 4.4.2, but swaps internal <> external sd. In addition to that, shows 350 mb/sec for Sandisk Ultra 32gb class10.