Post Spatial
Pin notes to the real world
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Bolt a digital note to any building. Post locks your message to exact GPS coordinates using ARCore Geospatial so anyone walking by can discover it in AR.
Post lets you leave digital notes on real buildings. Walk up, point your phone, hold to charge, and drop your message right onto the surface. It stays anchored there in 3D space for anyone else to find.
We built Post on top of Google's ARCore Geospatial API and their Visual Positioning System. That means the app recognizes the actual visual features of buildings around you and matches them against Google Street View data to figure out exactly where you are, down to about a meter. Your notes are not just floating in space. They are locked to real GPS coordinates and altitude, and they survive between sessions and across devices.
HOW IT WORKS
Open Post and point your iPhone at a building. The accuracy badge in the corner will turn cyan once the Visual Positioning System has locked on (usually takes about 2 to 5 seconds). A reticle in the center of your screen snaps to the building surface. Long press to charge your pin, release to drop it, then type your message. That's it. You just left a mark on the real world.
WHAT YOU CAN DO
Tag your favorite restaurant with a recommendation. Leave a note on a friend's building. Drop delivery instructions at a front door. Mark a hidden trail or a great view. Every building and landmark becomes a surface you can write on.
THE TECH BEHIND IT
Post combines ARKit, ARCore Geospatial, and StreetscapeGeometry to understand the 3D structure of the buildings around you. This is not marker-based AR and it does not require QR codes or pre-mapped spaces. It works on any street that Google has covered with Street View.
What that means in practice:
- Sub-meter positioning accuracy using Visual Positioning
- Building-aware anchoring through StreetscapeGeometry
- Real-time surface detection with haptic feedback as you aim
- Context-aware quick messages based on what kind of building you are looking at
- Persistent anchors that stay put even after you close the app
PRIVACY
Debug logs round your coordinates to 4 decimal places (about 11 meters of precision). We never store your location with more accuracy than we need, and camera data stays entirely on your device.
REQUIREMENTS
- iPhone 8 or newer with ARKit
- iOS 15.0 or later
- Works best outdoors in daylight with a clear view of buildings
- The VPS needs to see building facades to lock on, so open areas without structures may not work
This is version one. We are building a spatial web and this is the first layer. Step outside and leave your first mark.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Jason Mander, 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 Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jason Mander
- Size
- 53.7 MB
- Category
- Navigation
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Contains
User-Generated Content
Social Media
- Copyright
- © 2026 Post Spatial. All rights reserved.