can the inmates use the tablet after release

Yes, but with some limitations.

In most cases, the tablet itself is purchased by the inmate, so they can keep it after release. However, the content and services on the tablet, like messaging, email, and other features, are tied to the facility’s system.

Once they’re released, those services no longer function the same way, and previously stored content, including messages, typically does not remain accessible on the device.

So they may keep the tablet, but it won’t operate the same as it did while they were incarcerated.