# O3 ONField vs Dotzza

The clearest difference is in-app purchases: O3 ONField at none against Dotzza's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Dotzza sells 4 in-app purchases, starting at $2.99 per month. O3 ONField asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | O3 ONField | Dotzza |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/o3-onfield/id6748837231/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free | — |
| Size | 35 MB | 92 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [O3 Solutions](https://appshunter.io/developer/1449739669) | [Dotzza](https://appshunter.io/developer/1871725828) |

## What reviewers say

### 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


### Dotzza

[App page](https://appshunter.io/ios/app/dotzza/id6758245020)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dotzza Lite Monthly | $2.99 | per month |
| Dotzza Pro – Monthly | $2.99 | per month |
| Dotzza Lite – Yearly | $19.99 | per year |
| Dotzza Pro – Yearly | $29.99 | per year |


## Frequently asked questions

### Is O3 ONField free?

O3 ONField is free to download, with no in-app purchases.

### Is Dotzza free?

Dotzza is free to download, with in-app purchases available.

### Do O3 ONField or Dotzza have ads?

Neither O3 ONField nor Dotzza shows ads.

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

O3 ONField ships an update fortnightly, and Dotzza fortnightly. Most recently, O3 ONField was updated on September 30, 2026 and Dotzza on September 29, 2026.

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