microSD cards fast enough for running Android apps will be marked with the new A1 symbol

microSD cards fast enough for running Android apps will be marked with the new A1 symbol
You know those little symbols on microSD cards that show you information such as their capacity (HC, XC) and speed class? There's now a new symbol, designed specifically to indicate running app performance. The new Application Performance Class logo will be used on microSD cards that offer minimum recommended random and sequential performance speeds to meet execution time requirements to run apps.

This is useful for owners of Android Marshmallow and later devices, as it was in late 2015 that Google added adoptable storage support to the operating system. It requires users to own or buy a microSD memory card before running a benchmark tests, and alas, some microSD cards may not pass the test, because they were developed for optimal image and video capture instead of application running. The App Performance Class symbol will give product manufacturers a way to communicate its app-running optimization before buying a microSD card.

Upon release, the SD Association has introduced the first and most basic App Performance level, which is App Performance Class 1, or A1. The SDA will introduce higher App Performance levels as market needs evolve. microSD memory cards that display the A1 symbol (pictured below) meet, or exceed, the following recommended speeds:

  • Random Read Input-Output access Per Second (IOPS) of 1500
  • Write IOPS of 500
  • Sustained Sequential performance of 10MB/s.

microSD cards fast enough for running Android apps will be marked with the new A1 symbol



source: SD Association (Marketwire) via Android Authority

FEATURED VIDEO

25 Comments

1. f_u_006

Posts: 112; Member since: Mar 19, 2014

Apple will probably sue the SD association for using the letter 'A'.

2. kiko007

Posts: 7469; Member since: Feb 17, 2016

Totally relevant comment right here...

3. piyath

Posts: 2445; Member since: Mar 23, 2012

So Class 10/UHS 1 is capable of having A1 grade performance?

6. joey_sfb

Posts: 6794; Member since: Mar 29, 2012

Not quite. Personally I would go with a UHS-I U3. I bought a Samsung EVO+ 128GB, Marshmallow adoptable storage still alert that the microSD card is slow. Later bought a SanDisk Extreme 128GB, no more alert during its formatting.https://www.amazon.com/dp/B01DYN4VPE?ref=emc_b_5_t

18. marorun

Posts: 5029; Member since: Mar 30, 2015

i disagree. I have a cheap silicon power 128 gb sdxc class 10 uhs-1 and its run like a charm with adopt storage on my old moto x play. no slow down at all. Samsung going down the drain lately..

22. crzykiller

Posts: 86; Member since: Jan 03, 2015

That's because you have a old moto x play duh. Good UFS 2.0 storage is much faster than this and installing apps to that sdcard would slow things down dramatically when it comes to app loading time. You always post stupid comments on this site without knowing what you are talking about.

25. piyath

Posts: 2445; Member since: Mar 23, 2012

I have a Sandisk ultra Class 10 64GB card in my Galaxy S7 and it works perfectly without any errors. What's up with that? But I don't record 4K video.

14. ebilcake

Posts: 1215; Member since: Jul 16, 2016

Some, yes. However that doesn't mean your phone is capable. :-D

4. tangbunna

Posts: 444; Member since: Sep 29, 2016

U3 is not good enough for app ?

7. joey_sfb

Posts: 6794; Member since: Mar 29, 2012

U3 is better than the current propose A1. So buy U3 if you want fast response from app e.g gaming. In fact I don't feel any different gaming on a U3 microSD card compare to internal storage.

19. marorun

Posts: 5029; Member since: Mar 30, 2015

i dont see any difference on a silicon power 128 gb sdxc class 10 uhs-1 lol

24. joey_sfb

Posts: 6794; Member since: Mar 29, 2012

I don't have silicon power microSD so wouldn't be able to comment on its speed and durability. Maybe its a real gem.

5. epdm2be

Posts: 815; Member since: Apr 20, 2012

Great, more meaningless symbols for the mass.

8. apakalo1

Posts: 67; Member since: Nov 19, 2015

So what's the best and fastest Micro SD

9. ibend

Posts: 6747; Member since: Sep 30, 2014

if it's fast enough those flagships wont have reason to exclude MicroSD slot... ever again :D

10. surethom

Posts: 1587; Member since: Mar 04, 2009

Pity Samsung does not care about there users as remove adaptive storage from most of its devices.

11. apakalo1

Posts: 67; Member since: Nov 19, 2015

Are you okay?

13. ebilcake

Posts: 1215; Member since: Jul 16, 2016

The reason they removed them is because the performance of the average sdcard is s**t. They removed it to protect their users, considering most Samsung users are morons with no technical knowledge, similar to Apple users then they did the right thing. (not all of them of course). This is a step forward but unless Google implement a way of verifying performance of sdcards before allowing this feature, it's pointless.

16. epdm2be

Posts: 815; Member since: Apr 20, 2012

"...most Samsung users are morons with no technical knowledge..." but that is were WE, morons WITH technical knowledge, may indeed help them, isn't it? Besides not ALL Samsung users are tech-illiterate fools. in fact, most of them used to be tech-knowledgeable a few years ago. I guess the saying: "a fool and his money..." is more important to them nowadays then common sense and great devices. These days phones only need to "look great" without being great :-( Damn, I miss that SE K800i :0)

20. marorun

Posts: 5029; Member since: Mar 30, 2015

love ppl who know nothing.. the feature already verify if your card is fast enuf and will say if not. They should had deactivated it by default but leave the option in setting to reactivate this would have solve the problem where some user are not techno.

12. ebilcake

Posts: 1215; Member since: Jul 16, 2016

Another reason why I don't buy phones with microsd cards, never having to deal with this crap is a great thing.

17. epdm2be

Posts: 815; Member since: Apr 20, 2012

Sure, it's better to pay 200 bucks for 16GB more internal storage in the phone instead of a 20 bucks for a 32GB U1 (or Class 10) micro SD-card. Especially for the phone manufacturer. Just look at Apple... 60 to 70% gross profit per device. Now IF they'd used part of that profit to maintain or improve living-standard of their low-level employees (and keep the workforce in US for that matter) then I'd understand (and perhaps even support). But nowadays these greedy bastards (and that's not just Apple) only want to fill up their pockets as quick as possible. So OBVIOUSLY I am not gonna make it easy for them!

15. Michigan

Posts: 246; Member since: Nov 19, 2016

get ready A1? they are hexed! sued by apple demanding $$$$$$$$$ name it N1.

21. gersont1000

Posts: 473; Member since: Mar 13, 2012

It's funny how Apple fans feel so proud of Apple's profits, basically saying "YES! Look, they are ripping us off even more, I LOVE this company!". The same thing partly goes to Samsung fans, but nowhere on the level of Apple. I'm a fan of phones (not phone companies) that give me the most bang for the buck with excellent performance and freedom to do as much as I can with it. If it wasn't for T-Mobile's Jump! On Demand program and being able to switch phones all the time, I'd be buying from the amazing phones out now around $350-$450.

23. gersont1000

Posts: 473; Member since: Mar 13, 2012

Oops, I meant to comment on a different article but somehow put the comment here.

Latest Stories

This copy is for your personal, non-commercial use only. You can order presentation-ready copies for distribution to your colleagues, clients or customers at https://www.parsintl.com/phonearena or use the Reprints & Permissions tool that appears at the bottom of each web page. Visit https://www.parsintl.com/ for samples and additional information.