Comparison

Aufmaster 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

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.

Highlights
  • Automated cable length measurement
  • Digital job documentation
  • Real-time cable inventory
  • Project-based invoicing
  • Patented measuring method
  • Designed for trades
Read 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.

About

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.

Highlights
  • Mobile capital project management
  • Advanced Work Packaging (AWP) support
  • Agile and Lean methodologies
  • Offline IWP progressing
  • Jobsite productivity tools
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

Aufmaster4 screens
O3 ONField4 screens

Verdict

The call

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

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 4.3. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

Aufmaster ships an update monthly, O3 ONField fortnightly. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 5 level
Aufmaster versus O3 ONField: the parameters behind the verdict, then further details
ParameterAufmasterO3 ONField
PriceFreeFree
Rating4.3 (4 ratings)5.0 (1 ratings) — better
Number of ratings4 — better1
Update frequencyMonthlyFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS26.015.0 — better
Further details — not scored
Size70 MB34 MB
Age rating4+4+
DeveloperAufmasterO3 Solutions

Customer experience

Aufmaster

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%

O3 ONField

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

In-app purchases

None

Aufmaster

No in-app purchases

None

O3 ONField

No in-app purchases

Questions

Is Aufmaster free?
Aufmaster 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, Aufmaster or O3 ONField?
O3 ONField is rated higher. Aufmaster averages 4.3 out of 5 from 4 ratings, while O3 ONField averages 5.0 from 1 ratings.
Do Aufmaster or O3 ONField have ads?
Neither Aufmaster nor O3 ONField shows ads.
Which is updated more often, Aufmaster or O3 ONField?
Aufmaster ships an update monthly, and O3 ONField fortnightly. Most recently, Aufmaster was updated on November 8, 2026 and O3 ONField on October 30, 2026.

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