# Buildern vs O3 ONField

The clearest difference is ratings volume: Buildern at 5 against O3 ONField's 1. On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Buildern against 5.0 for O3 ONField. That said, the two scores are not equally well evidenced: Buildern has 5 ratings behind it against 1, so its average is the more settled of the two.

Buildern ships an update every 2 weeks, O3 ONField fortnightly. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Buildern | O3 ONField |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/buildern/id6444766029/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/o3-onfield/id6748837231/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | Free | Free |
| Size | 37 MB | 35 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Buildern Inc](https://appshunter.io/developer/1656680737) | [O3 Solutions](https://appshunter.io/developer/1449739669) |

## What reviewers say

### Buildern

[App page](https://appshunter.io/ios/app/buildern/id6444766029)

This app provides a comprehensive suite of tools for construction management, including project planning, budgeting, team communication, and reporting. Its intuitive interface aims to streamline workflows for construction professionals.

**Highlights:** Project management, Budgeting tools, Team communication, Reporting features, Intuitive interface

**In-app purchases:** none


### O3 ONField

[App page](https://appshunter.io/ios/app/o3-onfield/id6748837231)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Buildern free?

Buildern 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, Buildern or O3 ONField?

Buildern and O3 ONField are both rated 5.0 out of 5 on the App Store, from 5 and 1 ratings respectively.

### Do Buildern or O3 ONField have ads?

Neither Buildern nor O3 ONField shows ads.

### Which is updated more often, Buildern or O3 ONField?

Buildern ships an update every 2 weeks, and O3 ONField fortnightly. Most recently, Buildern was updated on October 10, 2026 and O3 ONField on October 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*