PractiCal AR

PractiCal AR helps FIRST® Robotics Competition teams calibrate and check practice field AprilTag placement using augmented reality and AprilTag detection.

Use your device to detect AprilTags, build a field map, compare detected tag positions against an ideal field layout, and export the results for use in other tools.

APRILTAG DETECTION
Detect AprilTags in real time using your device’s camera and ARKit. Each detected tag is shown in the AR view with its 3D pose so you can see position and orientation while scanning
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FIELD CALIBRATION
Scan your practice field AprilTags and compare their detected positions against the official field layout.

CALIBRATION REPORT
View a table showing Ideal vs. Actual tag placement, then export the report as CSV, JSON, or Markdown.

3D FIELD MODEL
View this season’s simplified field CAD model in a 3D viewer, or place it in your environment using AR.

REVIEW MODE
Review saved calibration data in the app without needing to be in front of the field.

EXPORT YOUR DATA
Export your field calibration data in WPILib JSON format and Limelight JSON format.

PractiCal AR is free, with no in-app purchases or ads. Built by an FRC mentor for the FRC community.
Requires a device with ARKit support and a camera. Works best in a well-lit environment with clearly visible AprilTags.

LEGAL & TRADEMARKS
This app is an independent educational project developed by Eagle Evolution, FRC Team #3322.
The 3D field models included are simplified derivative works created for reference purposes, based on the official 2026 FIRST® Robotics Competition season, REBUILT™ presented by Haas.
FIRST®, the FIRST® logo, FIRST® Robotics Competition, and REBUILT™ are trademarks of For Inspiration and Recognition of Science and Technology (FIRST®), which is not overseeing, involved with, or responsible for this activity, product, or service. All original CAD data and field technical information are the sole property of FIRST®. Any reproduction of the original CAD, in part or as a whole, without written permission from FIRST® is prohibited.
AprilTag detection is powered by the AprilTag 3 library, licensed under the BSD 2-Clause License.