ScreenSafe

ScreenSafe isn't trying to be everything. It does one thing — detect shoulder surfers — and does it with a privacy-respecting, on-device approach. If you regularly pull up confidential documents on your phone in a cafe, on transit, or in a co-working space, the silent vibration alert is a genuinely useful nudge. It won't stop a determined snoop, but it gives you the split-second warning you need to lock your screen. Where it shines is its zero-upload architecture. Unlike cloud-based alternatives like Detext, ScreenSafe keeps all detection local, meaning no face data ever leaves your device. That's a meaningful differentiator for privacy-conscious users. The downside: you're limited to a single phone's front camera, and you need to remember to have the app active when you're in a high-risk setting. We'd reach for this app when you need a lightweight, low-cost layer of protection without committing to a subscription. The free tier covers the core detection, and the Premium features — Intruder Snapshot and Trusted Faces — are genuinely useful for forensic review and reducing false alarms. But if you're expecting a full security suite, a VPN, or anti-malware protection, this isn't it. Compared to Detext, ScreenSafe's main advantage is privacy: no cloud processing, no account needed. The trade-off is that you don't get cloud backup or cross-device sync, which some users might want. Also, the app relies on your front camera, so battery and performance vary by device, and low-light performance is hardware-dependent. In practice, we'd suggest trying the free tier first. If you find yourself in public spaces with sensitive info regularly, the Premium upgrade is a modest in-app purchase that adds real value. Just be aware that ScreenSafe is a complement, not a replacement,