True SD Card Capacity & Speed

Catch fake or flaky MicroSD cards before you lose valuable data

App info

Version :

Category :

Tools

Update :

August 19, 2025

Installs :

317,854

Developer :

Alan Robinson

Requires Android :

Android Varies with device

Content Rating :

Everyone

Get it on :

Download APK

App description

Android App Analysis and Review: True SD Card Capacity & Speed, Developed by Alan Robinson. Listed in Tools Category. Current Version Is 16, Updated On 19/08/2025 . According to users reviews on Google Play: True SD Card Capacity & Speed. Achieved Over 318 thousand Installs. True SD Card Capacity & Speed Currently Has 1 thousand Reviews, Average Rating 4.6 Stars

This "short" endurance test confirms if your SD card is valid and reliable OR if it's a counterfeit that has way less storage space than advertised. It fills your card with carefully designed files that the app can then verify to ensure that what's written to your flash card can be read back reliability. It also measures read & write speed at the same time, because, why not?

It's not the most pretty app because the focus has been instead on real-world testing and good algorithms. It is, however, easy enough to use. The only way to know your card is good is to fill it to the advertised capacity. Typically this takes less than an hour but can be longer if the card is particularly slow or enormous. Piece of mind is worth the wait and there are no shortcuts to it!

You can also test your phone's internal storage. With USB-OTG you probably can test thumb drives too, depending on how your phone works.

Note: English only. The default settings are reasonable, however, so you may just proceed to "start test".

We are currently offering version 16. This is our latest, most optimized version. It is suitable for many different devices. Free download directly apk from the Google Play Store or other versions we're hosting. Moreover, you can download without registration and no login required.

We have more than 2000+ available devices for Samsung, Xiaomi, Huawei, Oppo, Vivo, Motorola, LG, Google, OnePlus, Sony, Tablet ... with so many options, it’s easy for you to choose games or software that fit your device.

It can come in handy if there are any country restrictions or any restrictions from the side of your device on the Google App Store.

What's New

Full android 16 support.

Rate and review on Google Play store

4.6

1,161 total

5 85.1

4 3.8

3 1.6

2 2.6

1 6.9

Total number of ratings

Total number of active users rated for: True SD Card Capacity & Speed

Total number of installs (*estimated)

Estimation of total number of installs on Google Play, Approximated from number of ratings and install bounds achieved on Google Play.

Recent Comments

simon patterson

I have to say I love this app! It fills what ever sd card that i plug into my Galaxy note 4. I use the internal card slot and not OTG. The app fills the card and you have the option to leave the data on the card and go back some time later and verify it is still there and hopefully not corrupted I have several different sd cards that I am endurance testing. I load them up and verify the data once then put them in the freezer for a couple of days. Then verify, back to freezer and repeat.

Buck Rogers

Was easy to set up & use. screen looks OK on phone using. Got a 512gb card to check as so much is fake/flaky these days! But only shows 461gb! UHS-1.U3.V30.A1.gave 42.6MB & 58.1MB Read with no errors! & trying to find out what's what with memory cards is hard work as most sites are trying to direct you to amazon! But after some digging on APP store found this & had a read up about it so thought would try it out. Select what you want to test&tap go &leave it to its own device till finished.

Ow Ow

Barebones and straight to the point. It only fills a SD card with temporary files while recording read/write speed, verifies that they are real and not corrupted, and guides you on how to clear up said temp files to actually use your (hopefully) authentic and properly functioning SD Card. I have a tip,you can remove battery optimisations in the settings to run it in the background. In the case that it does restart, you can just pick up from where you left it from.

Ken Dee

Excellent. Very fast and easy to use. A cheap 32gb card took about 40 minutes to test and it was all as advertised. On my phone it worked at 1gb per minute to write and much faster to read. This is much quicker than using a PC to check micro SDs. If you use your phone for anything else the App pauses and you can just restart it. I tested a suspect 32gb cctv card. Files not readable. I guessed it was fake. The App found this and trashed the card, which was not reliable anyway.

Hume Photos

I am so glad I ran this test! I bought a cheap SD card from Amazon. I didn't know any better. It was a total accident that I found out about fake SD cards. I was just comparing brands to figure out which one to buy & came across the info. (Thanks, Google!) I went ahead and got one just to find out for myself. Phone read it as a 1 TB card. The test found that nearly 75% of the written files became corrupted. This app saved me from likely losing countless priceless memories!!

David Harris

A basic no frills app that writes multiple large files to the card reporting write speed then verifies all files and reports read speed and errors or corruption as it checks them. Can take many hours but it does do a thorough test. I used to test by filling with photos then looking at each one and that was a real pain. It is easy enough to use and worth reading the warnings provided.

Now You're Talkin

As most of the reviews say, this app is very easy to operate. I made the mistake of not switching from internal to external test. I just bought a cheap 128 GB card on temu. The internal was much smaller & more than already half used. So I wound up with a test that said 19GB & lol, I was this close to calling the seller a thief & asking for refund. I figured out my mistake & switched to SD card & test was successful. Yay! It took approx 75 min on network 4g/5g. It's ALL GOOD! 100% recommend!

Sahil Bhandari

worked normally and completed the test perfectly. idk my mobile may be slower because the read speed of my sd card shows 100 mbps while the app said 67mbps idk and read speed was perfect 45 mbps my sd card is 64 gb lexar 633x and yes thanks for making such tool. i would like to buy your app if it gives some additional benefits. thanks again!