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Models with the most samples
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Storage performance
Sequential read
MiB/s · higher is fasterB is 0.03% lower than A
Sequential write
MiB/s · higher is fasterB is 7.50% lower than A
4 KiB random read
MiB/s · higher is fasterB is 8.67% higher than A
4 KiB random write
MiB/s · higher is fasterB is 11.09% lower than A
Configuration details
| Detail | A · iPhone15,4(iPhone15,4) · 512 GB | B · iPad14,8(iPad14,8) · 256 GB |
|---|---|---|
| Platform | iOS | iOS |
| Sample count | 73 | 87 |
| Latest measurement | 2026-03-02 | 2026-07-11 |
| Random read IOPS | 10,613 | 11,534 |
| Random write IOPS | 7,898 | 7,022 |
| All capacities | View Model → | View Model → |
Results checked · Speeds in MiB/s · About these measurements
Four tests. A clearer comparison.
Compare sequential and 4 KiB random read/write speeds side by side. Every option includes its Model, capacity and platform. You can compare 512 GB with 256 GB, including two capacities of the same Model.