AmorphousDiskMark

Spec sheet

Purpose

AmorphousDiskMark measures storage read/write performance in MB/s and IOPS.Read 11 Oct 2026 · katsurashareware.com

Free plan

NoRead 24 Sep 2026 · katsurashareware.com

Privacy

Apple’s listing says the developer reports that the app does not collect data; Apple says this information has not been verified by Apple.Read 11 Oct 2026 · apps.apple.com

Support

The maker lists [email protected] as a contact address and directs users to its forum for tips and usage examples.Read 11 Oct 2026 · katsurashareware.com

Benchmark caution

The maker cautions that repeated read/write measurements may shorten the lifespan of the storage device.Read 11 Oct 2026 · katsurashareware.com

Compatibility

The maker lists macOS 10.9.5 or later as the operating system requirement.Read 11 Oct 2026 · katsurashareware.com

Distribution

The maker describes the app as free and open source and links to its source repository.Read 11 Oct 2026 · katsurashareware.com

Interface

The maker says it received permission from the author of CrystalDiskMark to use an identical or similar interface.Read 11 Oct 2026 · katsurashareware.com

Maker history

Katsura Shareware says it was founded in 2004 and describes its mission as creating shareware that makes Macs more useful and fun to use.Read 11 Oct 2026 · katsurashareware.com

Offline use

The maker’s help page says an app does not need an internet connection after it is downloaded.Read 11 Oct 2026 · katsurashareware.com

Operating systems

macOSRead 24 Sep 2026 · katsurashareware.com

Random tests

It measures random 4 KiB block reads and writes at queue depths from 1 to 1024.Read 11 Oct 2026 · katsurashareware.com

Results

Read/write results can be displayed in MB/s or IOPS, and measurements can be copied as plain text or saved in a screenshot.Read 11 Oct 2026 · katsurashareware.com

Sequential tests

It measures sequential 1 MiB block reads and writes at queue depths from 1 to 1024.Read 11 Oct 2026 · katsurashareware.com

Test options

Users can choose random or zero test data, measurement sizes from 16 MiB to 64 GiB, and intervals from 0 seconds to 10 minutes.Read 11 Oct 2026 · katsurashareware.com

Workload areas

Sequential read/write; random read/writeRead 24 Sep 2026 · katsurashareware.com

Plans and prices

Every AmorphousDiskMark plan and price →

Where Specifiction places it

• PC Benchmark Software#24 of 738.1
• PC benchmark tools#62 of 707.3