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LeaveSafe, published by Atakan Kızılyüce and currently at version 1.3.3 as the latest of four released versions, is a security application that turns a smartphone into a remote alarm for a laptop that its owner has stepped away from. Falling into the anti-theft and device security category, it is designed for situations where a laptop must be left temporarily unattended, such as in cafés, libraries, offices, or other shared spaces. The setup process is straightforward: the user runs LeaveSafe on the laptop, scans the QR code it displays with a phone, taps Arm, and walks away. From that point, the laptop continuously monitors its own charger, lid, USB ports, screen lock status, network, and input activity. The moment any of these indicators changes, suggesting that someone may be touching, unplugging, or moving the machine, the paired phone sounds an alarm in the owner's pocket while the laptop itself begins sounding as well, alerting the owner and potentially deterring the intruder. A defining characteristic of the software is its privacy-focused architecture: it requires no account, no server, and no internet connection. The phone communicates directly with the laptop over the local network or Bluetooth, and the 16-digit pairing key used to secure that connection never leaves the two devices. This design keeps the pairing relationship strictly between the laptop and the phone, with no third-party infrastructure involved in either the monitoring or the alerting process. LeaveSafe therefore suits users who want a simple, self-contained way to guard an unattended laptop against tampering or theft without relying on cloud services, subscriptions, or external connectivity, making it usable even in environments where internet access is unavailable or undesirable.
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