Knocksser
Productivity
Only for iPhone
Free
iPhone
Stick a QR on your door. When someone presses it, your phone rings like a real call. No drilling. No wires. No app for the visitor.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, TUSSER SYSTEMS SOCIEDAD LIMITADA., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- TUSSER SYSTEMS SOCIEDAD LIMITADA.
- Size
- 30.2 MB
- Category
- Productivity
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Knocksser