Assemble Mobile vs O3 ONField
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Assemble Mobile
Access and interact with federated building information models in 3D, even offline. Navigate complex models, view properties, take measurements, and implement custom workflows with ease.
- Offline access to projects and models
- 3D model navigation and interrogation
- Isolate objects and rooms
- View, update, and search model properties
- Measure lengths and areas
- Scan barcodes for object selection
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Extend the advantage of your federated Assemble models and model properties to your field team with Assemble Mobile: - Easily access Assemble Projects, Models, and Saved Views while online and offline - Navigate and interrogate the model in a fast, powerful, and intuitive 3D model viewer - Instantly Isolate objects or rooms in section views - Immerse yourself in the model by entering rooms and navigating with your device's gyroscope - View, update, and search for model properties - even when offline - Measure lengths and areas with ease and track running totals on screen. - Create and animate timeline views from any of set of property values. - Scan barcodes to select objects, enter rooms, or read in property values - Implement custom workflows by utilizing saved views, model properties, colors by properties, unit costs, and assembly codes Assemble Mobile is a must have app for anyone on the extended project team that can benefit from Assemble's federated building information models in the cloud.
O3 ONField
This mobile application extends a capital project management platform to job sites. It supports industry-leading practices and enables key workflows like IWP progressing even in offline or low-connectivity environments.
- Mobile access to capital project management
- Supports AWP, Agile, and Lean practices
- Offline workflow capabilities
- IWP progressing
- Jobsite productivity enhancement
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O3 ONField brings the power of O3’s capital project management platform directly to your mobile device. Built on industry-leading practices like Advanced Work Packaging (AWP), Agile, and Lean, O3 empowers teams to drive performance from planning through startup. Designed for the realities of the jobsite, ONField enables key workflows—such as IWP progressing—even when offline, ensuring productivity in low-connectivity environments.
Screenshots
Verdict
The clearest difference is rating: O3 ONField at 5.0 against Assemble Mobile's 4.5. O3 ONField also leads on update cadence (fortnightly vs every 2 months). Assemble Mobile's advantage is ratings volume (23 vs 1) and iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and monetization model 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.
O3 ONField holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Assemble Mobile has 23 ratings behind it against 1, so its average is the more settled of the two.
Assemble Mobile ships an update every 2 months, O3 ONField fortnightly. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.
| Parameter | Assemble Mobile | O3 ONField |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (23 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 23 — better | 1 |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 39 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Assemble Systems | O3 Insight, Inc. |
Customer experience
Assemble Mobile
O3 ONField
In-app purchases
Assemble Mobile
No in-app purchases
O3 ONField
No in-app purchases









