You set your own private 4-digit code during initial setup. Enter it on the calculator keypad and press '=' to open the full OS with AI chat, file manager, and settings.

Yes. Press the AC button at any time to return to the standard calculator screen. It works from any app - chat, files, or settings - so your calculator stays a calculator whenever you want.

QuantumCalc includes a 30-day Pro trial. After it ends, the Basic profile remains free. New Premium purchases are currently unavailable. Premium will soon be available as packages instead of subscriptions.

Three profiles with increasing AI capability: Basic (free forever), Pro (smarter, higher daily limit), and Advanced (most powerful, best for complex problems). Switch between them anytime from the sidebar.

Open the AI chat, select the camera option, and snap a photo of any equation, diagram, or handwritten notes. The hidden camera recognizes equations and text automatically - no typing required.

The standard calculator mode works fully offline. AI chat and cloud sync require a WiFi connection. Files stored on the device are always accessible regardless of connectivity.

Connect to WiFi and go to Settings > System > Check Updates. Firmware updates are delivered over-the-air (OTA) and install automatically. The device restarts once the update is complete.

Around 8 hours of active use with AI chat and camera. The display dims and turns off automatically to save power, and after 3 minutes of inactivity the device enters deep sleep, so a single charge lasts for weeks of standby between sessions. Charges via USB-C.