MQuant® StripScan vs Knocksser

Use the MQuant StripScan® app for fast and reliable determination of pH or chemical concentrations in aqueous solutions using MQuant® test strips.  The app guides through the measurement process, determines the measurement result by camera, and saves and visualizes measurements automatically.  • No more guessing: Instrumental readout rather than color-matching by eye. • Digital precision: Reliable and reproducible results, with warnings if critical measurement interferences are detected. • Data storage and traceability: Enriched datasets are stored automatically. Forget pen and paper! • Visualizations and analyses: Organize and group your data for better clarity on your measurement results.

Knocksser turns your phone into the doorbell of your home or business. Stick your personal QR on the door. When someone scans it and taps "Call", your phone rings with a real call — dedicated ringtone, full screen. You'll know it apart from any other notification. No drilling. No wires. No app for the visitor. HOW IT WORKS 1. Create your QR. 2. Stick it on your door (print on paper or sticker). 3. When someone presses it, your phone rings. Done. GREAT FOR · You live on a high floor and don't hear the doorbell. · Your doorbell has been broken for years. · You wear headphones while working or gaming at home. · You run a shop with a back office or several rooms. · You're older and have trouble hearing the door. · You manage an Airbnb without front desk. · Your office gets visitors but no doorperson. · Your warehouse has several floors and no one at the entrance. · You're a building concierge and don't want to publish your personal phone number. BUILT FOR REAL USE · Distinctive ringtone: you hear it apart from any other alert. · Only rings from the door: the app verifies the visitor is physically standing in front of your QR, within a radius you choose. No prank calls from across town. · Quiet hours: define when you don't want it to ring (night, meetings, etc.). · Multiple phones: the alert reaches every device connected to your account. · Multiple QRs per account: one for home, one for the shop, one for the office. · Team mode: invite your partner, family or team. Everyone gets the call, anyone can answer. · History: see when they called, from where, and whether you picked up. PRIVACY Visitors only see a button to call you. They don't see your phone number, your email, or who you are. We don't publish your location. We don't sell your data. KNOCKSSER IS NOT · A phone. There is no two-way voice call. · A video intercom. No video or audio from the visitor. · A smart lock. It doesn't open the door. It's a real alert when someone is at your door. Nothing more, nothing less. CONTACT Missing something or got an idea? Write to support@knocksser.app. Knocksser is in active development and grows with its community.