Aufmaster vs O3 ONField
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Aufmaster
Streamline cable measurement and documentation with your iPhone and a digital measuring device. Quickly record lengths, locations, and project details, and manage inventory efficiently, eliminating the need for paper records.
- Digital cable length measurement via iPhone + AM1
- Document measurements with time, location, and user
- Offline measurements with later sync
- Inventory and warehouse management
- Cloud account for project and inventory overview
Read full descriptionHide full description
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
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
Read full descriptionHide 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
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 every 4 weeks, O3 ONField fortnightly. The most recent releases landed on October 12, 2026 and October 16, 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 | Every 4 weeks | 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 | 69 MB | 35 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
