Diskio: Disk & SSD Speed Test
Diskio: Disk & SSD Speed Test is #17 in Utilities Paid in South Korea and charting in 2 of 24 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperSergii Khliustin
CategoryUtilities
Price4,400 KRW
Released
Rating★ 4.0 (4)
Version3.0.0
Age rating4+
First seen by us
24 Sep 2026
24 Sep 2026Installs (est.)1k+ worldwide
Rating
4.0 ★
4 ratings
Measured
Best rank now
#17
Utilities PaidMeasured
Diskio: Disk & SSD Speed Test on the App Store
App details
App ID
6467768299
Publisher
Sergii Khliustin
Content rating
4+
Diskio: Disk & SSD Speed Test downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Diskio: Disk & SSD Speed Test's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 24 countries.
| Country | Charts | Rank |
|---|---|---|
| South Korea | UtilitiesPaid | #17 |
| South Korea | All AppsPaid | #115 |
 China | UtilitiesPaid | #100 |
Apps near Diskio: Disk & SSD Speed Test on the chart
Utilities Paid, around #17.
Ratings
App Store, worldwide.
Rating
4.0 ★
4 ratings
Measured
Ratings
4
Measured
About Diskio: Disk & SSD Speed Test
How fast is your storage? Measure sequential read and write speeds on your iPhone or a compatible external drive. Go beyond one number with repeat runs and a detailed report.
SEE THE WHOLE RESULT
Choose 1, 3 or 6 runs. With 3 or 6 runs, see median read and write speeds, minimum and maximum values, and the result of every run.
CHECK CONSISTENCY
Choose 6 runs to assess read and write stability separately over the last five. See whether results are stable or vary, with the criteria explained in the app.
TEST YOUR SETUP
Use your iPhone's internal storage or select a compatible, writable external drive through Files. Choose a test file from 1 to 5 GiB and a block size of 1, 2, 4, 8 or 16 MiB. The defaults are 6 runs, a 1 GiB file and a 2 MiB block.
UNDERSTAND THE MEASUREMENT
Diskio 3.0 reworks the speed calculation and test-file sizing. Speeds are shown in MB/s, and write timing includes final filesystem synchronization. Follow each write and read phase as the test runs.
SHARE THE DETAILS
Send a result card with the full report, test settings and, after 6 runs, the stability assessment. The redesigned interface supports light and dark appearances, larger text and Reduce Motion.
GET STARTED
1. Select your storage and test settings.
2. Start the test and keep Diskio open.
3. Review the report or share your results.
A test needs enough free space for a temporary file. External storage must be accessible and writable through Files. Results depend on the device, storage, connection, free space and test settings.
The stability assessment adapts numerical criteria from SNIA SSS PTS. It is not a full SNIA-compliant benchmark, a drive-health check or a sustained-performance rating. Measurements in version 3.0 may differ from earlier versions because the method has changed.
SEE THE WHOLE RESULT
Choose 1, 3 or 6 runs. With 3 or 6 runs, see median read and write speeds, minimum and maximum values, and the result of every run.
CHECK CONSISTENCY
Choose 6 runs to assess read and write stability separately over the last five. See whether results are stable or vary, with the criteria explained in the app.
TEST YOUR SETUP
Use your iPhone's internal storage or select a compatible, writable external drive through Files. Choose a test file from 1 to 5 GiB and a block size of 1, 2, 4, 8 or 16 MiB. The defaults are 6 runs, a 1 GiB file and a 2 MiB block.
UNDERSTAND THE MEASUREMENT
Diskio 3.0 reworks the speed calculation and test-file sizing. Speeds are shown in MB/s, and write timing includes final filesystem synchronization. Follow each write and read phase as the test runs.
SHARE THE DETAILS
Send a result card with the full report, test settings and, after 6 runs, the stability assessment. The redesigned interface supports light and dark appearances, larger text and Reduce Motion.
GET STARTED
1. Select your storage and test settings.
2. Start the test and keep Diskio open.
3. Review the report or share your results.
A test needs enough free space for a temporary file. External storage must be accessible and writable through Files. Results depend on the device, storage, connection, free space and test settings.
The stability assessment adapts numerical criteria from SNIA SSS PTS. It is not a full SNIA-compliant benchmark, a drive-health check or a sustained-performance rating. Measurements in version 3.0 may differ from earlier versions because the method has changed.
Latest updates
3.0.0
Diskio 3.0 brings a redesigned interface and a reworked measurement method.
• Corrected speed calculations and test-file sizes. Write measurements now include final filesystem synchronization.
• Choose 1, 3 or 6 runs. View median speeds, min–max values and every individual result.
• Choose 6 runs to check result stability using adapted SNIA numerical criteria. This is not a full SNIA-compliant benchmark.
• Share the full report with test settings and stability results.
• Clearer progress, low-space warnings, improved cancellation and support for larger text and Reduce Motion.
• A new icon and updated translations in all five languages.
Results may differ from earlier versions because the measurement method has changed.