Comparison

Assemble Mobile vs O3 ONField

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • Mobile access to capital project management
  • Supports AWP, Agile, and Lean practices
  • Offline workflow capabilities
  • IWP progressing
  • Jobsite productivity enhancement
Features
Read full description

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

Assemble Mobile4 screens
O3 ONField4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 5 level
Assemble Mobile versus O3 ONField: the parameters behind the verdict, then further details
ParameterAssemble MobileO3 ONField
PriceFreeFree
Rating4.5 (23 ratings)5.0 (1 ratings) — better
Number of ratings23 — better1
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size39 MB34 MB
Age rating4+4+
DeveloperAssemble SystemsO3 Insight, Inc.

Customer experience

Assemble Mobile

All ratings22 ratings
Positive90.9%
Neutral0.0%
Negative9.1%

O3 ONField

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Assemble Mobile

No in-app purchases

None

O3 ONField

No in-app purchases

Questions

Is Assemble Mobile free?
Assemble Mobile is free to download, with no in-app purchases.
Is O3 ONField free?
O3 ONField is free to download, with no in-app purchases.
Which has better reviews, Assemble Mobile or O3 ONField?
O3 ONField is rated higher. Assemble Mobile averages 4.5 out of 5 from 23 ratings, while O3 ONField averages 5.0 from 1 ratings.
Do Assemble Mobile or O3 ONField have ads?
Neither Assemble Mobile nor O3 ONField shows ads.
Which is updated more often, Assemble Mobile or O3 ONField?
Assemble Mobile ships an update every 2 months, and O3 ONField fortnightly. Most recently, Assemble Mobile was updated on October 24, 2026 and O3 ONField on October 30, 2026.

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