License and lock down every rental tablet.
JLB Software issues per-device keys for the JLB Android app — Basic, Coin, and Rental modes. Bind a key to a device, revoke it in seconds, and see every activation. The app is free; you license the devices.
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Checksummed keys bind to one device on first activation.
Built for a rental fleet
Per-device licensing
Each key binds to the first tablet that activates it (its Android device ID). One leaked key unlocks exactly one device, never a fleet.
Basic, Coin, and Rental modes
The same app runs three ways: Basic for a plain locked tablet, Coin for coin/timer-metered sessions, and Rental for managed hand-outs.
Revoke and expire on demand
Revoke a key or set an expiry and the device locks itself on its next hourly check-in. No push, no agent to install.
Full activation audit
Every activation, mismatch, and rejected key is recorded with time, device fingerprint, and IP so you can see exactly what happened.
How it works
Install the app
Download the free universal APK and sideload it on your Redmi Pad SE (or any Android 13+ tablet). Guided HyperOS steps included.
Request a license
Tell us how many devices you run. We invoice out-of-band and issue your keys manually — no self-serve checkout to game.
Activate on the device
Enter a key on the tablet. It binds to that device and stays valid until you revoke it or it expires.
Under the hood
Bind-on-first-activation
A key stores the fingerprint of the first device to activate it. Any other device presenting the same key is refused.
Checksummed keys
Every key carries a keyed checksum group, so obviously forged keys are rejected before they ever touch the database.
Signed activation tokens
Each successful activation returns an Ed25519-signed token, laying the groundwork for tamper-evident device verification.
Hourly self-enforcement
Devices re-check about once an hour and lock themselves down when a key is revoked or expired — no server push required.
Frequently asked
How do I buy licenses?
Licensing is contact-only. Send us your device count on the contact form; we follow up with an invoice and then issue your keys manually. There is no automated checkout.
What does one license cover?
One key covers one device. It binds to the first tablet that activates it, so a key cannot be shared across multiple devices.
What are Basic, Coin, and Rental modes?
They are the three ways the app can run: Basic locks the tablet to your setup, Coin meters usage by coin or timer, and Rental supports managed hand-out workflows.
Is the app free?
Yes. The Android app is a free download. You only pay for the license keys that activate it.
What happens when a license is revoked or expires?
The tablet checks in roughly hourly. On the next check after a revoke or expiry, the app locks the device down automatically.
Which devices are supported?
Android tablets, primarily the Redmi Pad SE on MIUI/HyperOS (Android 13-15). The download page has device-specific install steps.
Ready to license your fleet?
Install the free app today and tell us how many devices you run. We will get your keys issued.