Aufmaster vs O3 ONField
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Aufmaster
This app streamlines job documentation and cable inventory for tradespeople. It uses a patented measuring method to quickly log cable lengths, eliminating manual data entry and reducing errors. Track jobs on-site and manage inventory efficiently, all from your mobile device.
- Automated cable length measurement
- Digital job documentation
- Real-time cable inventory
- Project-based invoicing
- Patented measuring method
- Designed for trades
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Job documentation and cable inventory, digital: the cable length meter with app and cloud. Built by the trade, for the trade. Looking for job documentation or inventory software for your electrical business? Aufmaster comes with the meter. Measure a cable length in 30 seconds. The meter and the Aufmaster app log every measurement automatically. No paper. No typing. Patented measuring method. Designed and built in Germany. Job tracking: Measure on site, bill from the office. Every length you measure makes it onto the invoice, filed under the right project. Cable inventory: See what's left on the reel. Right away. Inventory count? Done before your coffee gets cold. Fewer errors, faster finish. On every job, at every inventory count. Find out how to cut your overhead by up to 30% at aufmaster.com/en.
O3 ONField
Manage capital projects directly from your mobile device. This app supports industry-leading practices like Advanced Work Packaging (AWP), Agile, and Lean to boost team performance from planning to startup. It enables key workflows, such as IWP progressing, even when offline, ensuring productivity in low-connectivity jobsite environments.
- Mobile capital project management
- Advanced Work Packaging (AWP) support
- Agile and Lean methodologies
- Offline IWP progressing
- Jobsite productivity tools
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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 Aufmaster's 4.3. O3 ONField also leads on device support (3 vs 1) and iOS requirement (15.0 vs 26.0). Aufmaster's advantage is ratings volume (4 vs 1). On price, update cadence, ads and in-app purchases 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 4.3. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
Aufmaster ships an update monthly, O3 ONField fortnightly. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.
| Parameter | Aufmaster | O3 ONField |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (4 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 4 — better | 1 |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 70 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Aufmaster | O3 Solutions |
Customer experience
Aufmaster
O3 ONField
In-app purchases
Aufmaster
No in-app purchases
O3 ONField
No in-app purchases
Questions
Is Aufmaster free?
Is O3 ONField free?
Which has better reviews, Aufmaster or O3 ONField?
Do Aufmaster or O3 ONField have ads?
Which is updated more often, Aufmaster or O3 ONField?
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