Application Performance Class for Running Smartphone Apps - SD Association
Archived: 2026-04-23 17:10
Application Performance Class for Running Smartphone Apps - SD Association
Application Performance Class for Running Smartphone Apps
Consumers
About SD Memory Card Choices
SD, SDHC, SDXC and SDUC Card Capacity Choices
Bus Interface Speed Standards for Large Size Data Transfer
Speed Class Standards for Video Recording
Application Performance Class for Running Smartphone Apps
Low Voltage Signaling
Copyright Protection for Digital Data (CPRM)
SD Express / UHS-II Verification Program (SVP) Verified Product
#choosemicroSD
Usage Tip Videos
FAQ
Consumers
Consumers
About SD Memory Card Choices
SD, SDHC, SDXC and SDUC Card Capacity Choices
Bus Interface Speed Standards for Large Size Data Transfer
Speed Class Standards for Video Recording
Application Performance Class for Running Smartphone Apps
Low Voltage Signaling
Copyright Protection for Digital Data (CPRM)
SD Express / UHS-II Verification Program (SVP) Verified Product
#choosemicroSD
Usage Tip Videos
FAQ
With the expanded usage of SD memory cards for storing applications and application data, there is a growing need for a combination of random and sequential performance levels. This demand becomes even stronger with the introduction of Android’s Adopted Storage Device capability.
The App Performance Classes assure minimum random and sequential performance speeds to meet both run and store execution time requirements under given conditions, while still providing storage of pictures, videos, music, documents and other data.
This table describes the Application Performance Class 1 (A1) and Class 2 (A2) specification and the minimum random read performance inputs/outputs per second (IOPS), minimum random write performance(IOPS) and the minimum sustained sequential performance (MB/s) of the corresponding SDHC/SDXC Memory Cards under the conditions defined in SD 5.1/SD 6.0 Part 1 Physical specification.
Application Performance Class for Running Smartphone Apps
Consumers
About SD Memory Card Choices
SD, SDHC, SDXC and SDUC Card Capacity Choices
Bus Interface Speed Standards for Large Size Data Transfer
Speed Class Standards for Video Recording
Application Performance Class for Running Smartphone Apps
Low Voltage Signaling
Copyright Protection for Digital Data (CPRM)
SD Express / UHS-II Verification Program (SVP) Verified Product
#choosemicroSD
Usage Tip Videos
FAQ
Consumers
Consumers
About SD Memory Card Choices
SD, SDHC, SDXC and SDUC Card Capacity Choices
Bus Interface Speed Standards for Large Size Data Transfer
Speed Class Standards for Video Recording
Application Performance Class for Running Smartphone Apps
Low Voltage Signaling
Copyright Protection for Digital Data (CPRM)
SD Express / UHS-II Verification Program (SVP) Verified Product
#choosemicroSD
Usage Tip Videos
FAQ
With the expanded usage of SD memory cards for storing applications and application data, there is a growing need for a combination of random and sequential performance levels. This demand becomes even stronger with the introduction of Android’s Adopted Storage Device capability.
The App Performance Classes assure minimum random and sequential performance speeds to meet both run and store execution time requirements under given conditions, while still providing storage of pictures, videos, music, documents and other data.
This table describes the Application Performance Class 1 (A1) and Class 2 (A2) specification and the minimum random read performance inputs/outputs per second (IOPS), minimum random write performance(IOPS) and the minimum sustained sequential performance (MB/s) of the corresponding SDHC/SDXC Memory Cards under the conditions defined in SD 5.1/SD 6.0 Part 1 Physical specification.