Comparison

LEO Rigging Calculator 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

LEO Rigging Calculator

This app provides quick solutions for everyday rigging calculations, assisting engineers and safety personnel in site surveys and rigging plan designs. It helps verify calculations, determine clearances, and analyze load distribution for safe lifting operations. Results can be exported to PDF for easy sharing.

Highlights
  • Boom clearance calculator
  • Tail load calculator
  • Wind speed calculator
  • Sling tension calculator
  • Percentage capacity calculator
  • Sling weight calculator
  • Axle load calculator
  • SPMT GBP load calculator
Features
Read full description

LEO rigging calculator assists you to generate quick solutions to the everyday rigging calculations, which have to be made regularly by you in the course of a site survey or the design of a rigging plan. Also, helps the rigging engineers, supervisors, riggers, and safety personnel to verify the accuracy of calculations made by third party in a rigging or transportation plan. The most helpful feature of this App is, every result can be converted into PDF and send to anyone all over the globe through several document transfer methods supported by your smartphone. Leo rigging calculator App helps you to compute the following calculations. 1. Boom clearance calculator: The boom clearance calculator is designed to find the clearance between the nearest obstruction and the crane boom while performing a lifting activity by both the mobile and crawler cranes without preparing an Auto Cad-generated rigging plan, which will be more useful to avoid any clash during a lifting activity. For your future use, you can archive the crane data which you have entered into the app. 2. Tail load calculator: The tail load calculator is designed for finding out the amount of load shared by the main crane and the tail crane while performing a tailing operation. It gives the rate of change of load with respect to the tilt angle of the payload with horizontal from one crane to another. And the result will be illustrated in both the table and graph. 3. Wind speed calculator: The wind speed calculator is designed to find out the maximum permissible wind speed of various crane boom configurations relative to the size, shape, and weight of the load, which will be more useful while lifting a lighter object at high elevations or in a high windy environment. 4. Sling tension calculator: The sling tension calculator is designed to find out the maximum tension on each sling used in different modes of slinging arrangements, it also defines the tension on the sling used for lifting eccentric loads. 5. Percentage capacity calculator: The Percentage capacity calculator is designed to finding out the minimum capacity required on the load chart of a crane to perform a safe lift with respect to the weight of the load and allowable percentage capacity. 6. Sling Weight calculator: The Sling weight calculator is designed to finding out the weight of various types of slings. 7. Axle load calculator: The axle load calculator is designed to finding out the maximum axle load acting on the ground throughout the transportation of a load by using a combination of trailer and prime mover. 8. SPMT GBP load calculator: The SPMT GBP calculator is designed to finding out the maximum ground bearing pressure and maximum axle load acting on the ground during transportation of a payload by using SPMT. It also determines the minimum number of axle lines required for the transportation of a specific load. 9. Weight calculator: The weight calculator is designed to find out the weight of different shapes of metal objects of various

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

LEO Rigging Calculator4 screens
O3 ONField4 screens

Verdict

The call

The clearest difference is iOS requirement: LEO Rigging Calculator at 13.0 against O3 ONField's 15.0. 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.

UpkeepUpdate frequency

LEO Rigging Calculator ships an update every 3 weeks, O3 ONField fortnightly. Both last shipped on October 30, 2026.

Scorecard1 real difference · 9 level
LEO Rigging Calculator versus O3 ONField: the parameters behind the verdict, then further details
ParameterLEO Rigging CalculatorO3 ONField
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size61 MB34 MB
Age rating17+4+
DeveloperCLAN LEO PRIVATE LIMITEDO3 Solutions

Customer experience

LEO Rigging Calculator

Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

O3 ONField

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

In-app purchases

None

LEO Rigging Calculator

No in-app purchases

None

O3 ONField

No in-app purchases

Questions

Is LEO Rigging Calculator free?
LEO Rigging Calculator is free to download, with no in-app purchases.
Is O3 ONField free?
O3 ONField is free to download, with no in-app purchases.
Do LEO Rigging Calculator or O3 ONField have ads?
Neither LEO Rigging Calculator nor O3 ONField shows ads.
Which is updated more often, LEO Rigging Calculator or O3 ONField?
LEO Rigging Calculator ships an update every 3 weeks, and O3 ONField fortnightly. Most recently, LEO Rigging Calculator was updated on October 30, 2026 and O3 ONField on October 30, 2026.

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