# G-Compass — GPS + AR field layout > Augmented reality tool for real-world directional measurement and spatial layout. (iPhone/iPad app by Solar Foundations USA, Inc..) - Source: https://appshunter.io/ios/app/g-compass/id6760502482 (this page in markdown: same URL + `.md`) - Developer: [Solar Foundations USA, Inc.](https://appshunter.io/developer/1497761749) - Category: Utilities, Navigation - Price: $6.99 - Rating: 5.00/5 from 3 App Store ratings - Age rating: 4+ - Requires: iOS 17.6 · 27 MB - Languages: American English - Released: 2026-03-18 - Data updated: 2026-08-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/g-compass/id6760502482/reviews.md ## What is G? A field compass you can finally trust. G-Compass reads true-north bearings from GPS and augmented reality (AR) — not your phone's magnetometer — so nearby steel, rebar, vehicles, and local magnetic disturbances don't pull it off course, and there's no declination to set. From that same calibrated foundation it also measures distances and bearings between points, lays out new points and rectangles, and captures corner elevations — all visualized right in your camera view. Whether you're laying out a solar array, surveying land, planning an installation, marking boundaries, or aligning structures, G-Compass turns your phone into a practical field layout and directional-measurement tool. KEY FEATURES G-Compass — Calibrated AR Compass Read a stable true-north heading referenced to GPS, free of the magnetic interference and declination errors that throw off phone compasses and even quality sighting compasses. Readings are already true north — there's no magnetic declination to add or subtract. Sight the bearing to any object using the on-screen aiming crosshair. Two Point Measurement Mark two points — such as existing stakes — to instantly read the azimuth (bearing) and distance between them, so you can verify a layout was set correctly. Two Point Layout Place a point at a specified distance and azimuth from a reference point. Stake out with accurate orientation and spacing, even where tall grass or obstacles defeat a tape measure. Rectangle Layout Enter length, width, and orientation, and G-Compass generates the four corners in real space — so you can confirm the array fits the location and stake it out square. Walk to each corner to record its elevation and reveal the site's slopes for planning. Real-World AR Visualization See points, lines, and layouts overlaid directly onto your surroundings through augmented reality — no guesswork translating a drawing to the ground. Accurate GPS Integration A short guided calibration anchors every measurement to real-world coordinates and true north; from then on, your operations inherit that accuracy. IDEAL FOR - Solar array layout - Surveying and field layout - Construction and site planning - Land measurement - Outdoor mapping and orientation - Engineering and field operations HOW IT WORKS G-Compass calibrates augmented reality to GPS with a short walk between two points, then holds that reference as you work. For best results, use it outdoors with a clear view of the sky. G-Compass helps you plan, measure, and visualize spatial layouts with confidence — directly in the world in front of you. ## Key features - Measure azimuth between points - Place virtual markers by direction and distance - AR-based rectangle layout - Real-world visualization with AR - Accurate GPS integration - Field layout and planning ## Frequently asked questions about G ### What is G-Compass used for? G-Compass is used for measuring directions, placing virtual markers, and laying out accurate geometries in the real world using augmented reality and GPS. It's ideal for tasks like surveying, construction planning, and outdoor mapping. ### How accurate is G-Compass? G-Compass utilizes accurate GPS integration to anchor measurements to real-world coordinates, providing precise azimuths, distances, and orientations for field layout and planning. ### Can G-Compass help with construction layout? Yes, G-Compass features an AR-based rectangle layout tool where you can define length, width, and orientation to visualize the corners of a rectangle in real space, aiding in construction and site planning. ### What devices support G-Compass? G-Compass is supported on iPhone and iPad devices, leveraging their cameras and location sensors for its augmented reality and GPS functionalities. ### Is G-Compass suitable for land surveying? Absolutely. G-Compass is ideal for surveying and field layout, allowing users to measure azimuth between points, place virtual markers, and visualize spatial relationships directly in their environment. ### Does G-Compass have ads? No, G-Compass does not contain advertisements, providing an uninterrupted user experience for its measurement and layout features. ### How often is G-Compass updated? G-Compass was last updated on March 18, 2026, with version 1.0. Future updates will likely focus on enhancing its business and surveying capabilities. ### What is the age rating for G-Compass? G-Compass has an age rating of 4+, making it accessible for a wide range of users interested in its practical spatial measurement and AR features. ## Version history (last 3 releases) ### 1.2 — 2026-08-04 This update focuses on calibration — making it more accurate and easier in the field: • Finish where you'll work. Calibration now begins by helping you step away from your work area, so it ends right where you'll be measuring — the spot where AR is most accurate. Already 150–200 ft out? Just tap Skip. • Faster Rectangle Layout. The starting corner's elevation is captured the moment you place it, so you only record the other three corners. • A heads-up when you've drifted. If you work well beyond your calibration area — where AR can quietly lose accuracy — the app now reminds you to verify or re-calibrate. • Fewer mis-taps. "Mark Calibration Point 2" stays disabled until you're at least 50 feet out, so an accidental early tap can't cut a calibration short. • True north, made clear. Tap the ⓘ by the compass reading for a reminder that headings are already true north — no magnetic declination to add or subtract. Plus general stability and usability improvements. ### 1.1 — 2026-08-04 This update adds a calibrated AR compass and sharpens the field experience: • New — the G-Compass compass. Read a true-north heading referenced to GPS instead of the phone's magnetometer, so nearby steel and local magnetic interference don't pull it off course, and there's no declination to set. Aim at any object to sight its bearing. • Clearer compass display: a prominent heading index, a true-north marker, and a live readout of your latitude, longitude, elevation, and distance back to your calibration point. • The app now stays in portrait for steady, one-handed use, and rotates to landscape in Camera Mode so the AR scene fills the screen. • Photos exported from Camera Mode now include the location, date and time, and the direction the camera was facing, stamped onto the image. • Rectangle Layout now labels its azimuth as "(true)" to make the true-north reference explicit. • Plus refinements to the on-screen controls and general stability and usability improvements. ### 1.0 — 2026-03-18 No release notes. ## More apps by Solar Foundations USA, Inc. - [Geometry Visualization](https://appshunter.io/ios/app/geometry-visualization/id6758398596) All apps by Solar Foundations USA, Inc.: https://appshunter.io/developer/1497761749 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-05.*