Measure Fasteners with AR
Use your iPhone's LiDAR sensor and advanced computer vision to instantly measure fasteners and get socket size recommendations. Accurate, fast, and powered by machine learning.
Powerful Features
Professional-grade measurement tools in your pocket
Real-Time AR Measurement
Uses ARKit and LiDAR technology to measure fasteners in real-time with millimeter precision. Point, tap, and get instant measurements.
Computer Vision Detection
Advanced algorithms automatically detect hexagonal and square fasteners using dual-path detection with ML-first approach and Vision framework fallback.
Multi-Sample Averaging
Takes 3 consecutive measurements and averages them for superior accuracy. Detects inconsistent measurements to ensure reliability.
Socket Size Recommendations
Instantly matches measurements to standard metric and imperial socket sizes. Get the right tool for the job every time.
Metric & Imperial Support
Supports both measurement systems with 23 metric sizes (6-36mm) and 16 imperial sizes (1/4"-1 7/16"). Displays fractional inches beautifully.
Measurement History
Automatically saves your last 5 measurements and lets you build a named library with descriptions. Access your measurements anytime.
ML-Powered Detection
Custom-trained CoreML model provides 20-40% faster detection and better accuracy on industrial bolts. Trained on the NPU-BOLT dataset.
Privacy First
All measurements stored locally on your device. No cloud sync, no analytics, no tracking. Your data stays yours.
How It Works
Advanced technology made simple
Point Your Camera
Open the app and point your iPhone at a nut or bolt. The optimal distance is 20-40cm for best accuracy.
Automatic Detection
Computer vision automatically detects hexagonal and square fasteners using ML object detection and geometric analysis.
LiDAR Measurement
LiDAR sensor measures the exact distance, combined with camera intrinsics to convert pixels to millimeters with precision.
Get Socket Size
Instantly see the measurement and matching socket sizes in both metric and imperial. Save to your history for later reference.
Technical Specifications
Measurement Range
6mm - 36mm (metric)
1/4" - 1 7/16" (imperial)
Accuracy
±1.5mm tolerance
Multi-sample averaging
Detection Types
Hexagonal fasteners
Square fasteners
Requirements
iPhone 12 Pro or newer
iOS 16.0+
LiDAR sensor
Technologies
ARKit
CoreML
Vision Framework
LiDAR
Storage
Local UserDefaults
No cloud sync
Privacy-focused
Ready to Measure?
Download FastenAR and start measuring fasteners with professional accuracy.
Download on the App StoreRequires iPhone 12 Pro or newer with LiDAR sensor