Chief As vs Fathom ONE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chief As
Easily capture 3D floor plans of rooms using your iPhone or iPad's LiDAR scanner. Edit and import these models directly into desktop design software for remodeling projects. Streamline documentation of existing spaces and client collaboration.
- 3D floor plan capture via LiDAR
- In-app 3D model editing
- Import to Chief Architect desktop software
- Client room scanning capability
- Precise measurement tools
- Cloud sharing
Read full descriptionHide full description
Capture 3D floor plans of rooms by scanning or drawing on your iPhone or iPad. Make edits and import them directly into Chief Architect’s desktop software to begin remodeling. The As-Built app helps you quickly document existing room conditions. Even your clients can scan their rooms for you, saving you time. Remodeling has never been easier! The As-Built app uses the built-in LiDAR sensors on your iPhone or iPad to create a 3D model of your space. As you point your device around the room, moving up and down, you see the 3D model take shape. LiDAR (Light Detection and Ranging) uses pulsed lasers to measure distances and generate 3D models. Once the scan is complete, you can view the result in 3D and further edit it, for example, by entering exact dimensions from the screen or using a connected Bluetooth laser for precise measurements. There are also tools to add text notes and room and wall tools to refine the space. When you’re done, share the model in the cloud and access it with Chief Architect’s desktop design software to begin the remodel process.
Fathom ONE
Read full descriptionHide full description
Fathom ONE is the all-in-one field tool for contractors, designers, and remodelers. Capture precise room scans, communicate with clients in real time, and keep every project organized from the first site visit to final delivery. ROOM SCAN Turn any iPhone or iPad with a LiDAR Scanner into a professional measurement tool. Fathom ONE captures accurate 3D room data in minutes and converts it into: • Floor plan PDFs formatted and ready to share or print • High-resolution PNG floor plans for presentations, InDesign layouts, or email • DXF files optimized for Chief Architect, 2020 Design, KCD Software, and AutoCAD • USDZ 3D models, viewable in AR on any iPhone or iPad Every exported floor plan includes room dimensions, door and window locations, floor area, and a scale bar. Tap any dimension to correct it with your tape measurement. Export once, use in any software. CAD READY EXPORTS No manual cleanup required. Fathom ONE's export presets are purpose-built for the tools you already use: Chief Architect: inches, 3D walls, CAD-to-Walls format, with door and window openings and a window and door schedule 2020 Design: inches, 2D plan, angle-corrected centerlines KCD Software: inches, 2D room layout AutoCAD / Generic DXF: configurable to your preferred settings THE LOOP Keep clients informed without the back-and-forth. The Loop is a built-in messaging channel attached to each project, so conversations stay organized by job, not buried in text threads. Each project's daily logs are one tap away. Clients can log in from their own device to view updates, ask questions, and submit room scans directly from their home, no app expertise required. DAILY LOGS Document every day in the field with structured logs that include weather conditions, progress notes, inspection records, and milestone tracking. Attach photos directly from your camera roll. Every log is timestamped and stored by project. PROJECT DASHBOARD See your active projects, recent estimates, and permits at a glance, plus any punch items assigned to you. Jump into any project's Loop, scans, or logs in one tap. BUILT FOR THE FIELD Fathom ONE is designed for how contractors actually work: fast to open, easy to hand to a client, and room scans save offline and upload when you're back in range. No learning curve, no unnecessary features. Download Fathom ONE and spend less time measuring, more time building.
Screenshots
Verdict
The clearest difference is update cadence: Fathom ONE at every 3 days against Chief As's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Chief As ships an update every 2 months, Fathom ONE every 3 days. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.
| Parameter | Chief As | Fathom ONE |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (7 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 162 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Chief Architect | Fathom Solutions |
In-app purchases
Chief As
No in-app purchases
Fathom ONE
No in-app purchases








