Pro² 1.15.0
- Improved handling of measurement units and saved calculations.
- Updated translations and clearer in-app text.
- Bug fixes and stability improvements.
What's new in Pro²
Released improvements to construction calculations, saved work and measurement tools.
Construction Calculator: Pro² · App StoreConcrete volume · Reinforcement · Decking boards
- New Reinforcement tools for grids, mesh, and straight bars, with material quantities, weight, layout, and stock planning.
- Concrete is now a full category with six dedicated calculators for slabs, post holes, strip footings, walls, columns, and steps — plus ready-mix, bag, and cost planning.
- Rebuilt Decking with course layout, balanced edge boards, a visual plan, board quantities, and cost estimates.
- Quick Calculator now keeps feet, inches, and fractions available whether the app is set to Metric or Imperial.
- Improved Metric/Imperial switching so current values stay consistent when units change, plus smoother navigation when reopening Saved Calculations.
Concrete volume
Estimate concrete for a slab, strip footing, wall, column, steps or post holes. Keep net volume, allowance and delivery planning separate.
Reinforcement
Choose a reinforcing bar grid, manufactured reo mesh or a list of straight bars. Then plan stock purchases where the tool supports them.
Decking boards
For parallel board runs across a rectangular deck. The run length follows the boards; the cross width determines how many courses fit.
Save calculations and pick up where you left off.
Save and name calculations in all 25 construction calculators, including concrete, stairs and decking. Reopen them later, update them or make a copy for another job. Pro² also restores your inputs, calculator settings and last successful result when you reopen the app.
Measure. Calculate. Keep the result.
- Give the calculation a name and save it with its measurements.
- Open your saved calculations and find this calculation by its name.
- Keep your measurements with the result. Reopen a saved calculation, change the inputs and save the update or a separate version.
In Pro² · 1.15.0
Free access includes three calculations per local calendar day, shared across tools that use Calculate, including Converter. Quick Calculator is outside that counter. There is one shared free named-save slot for tools without paid coverage.
Full Pro covers the app; lifetime purchases cover selected tool families. Covered tools get unlimited calculations and named saves, with PNG/PDF export. Reinforcement and Brick & Block Wall have no separate lifetime purchase. Available prices and terms are shown in the app before purchase.
Share calculation
- New Quick Share: send the result of a construction calculation as an image directly from the calculator.
- Exporting is easier with improved previews and clearer Save PNG and Share PDF actions.
- Calculator inputs, results, and tables are clearer and easier to use, with smoother adjustments in the stair calculators.
- Improved support for iPhone accessibility features provides a smoother experience.
L-shaped stair calculator for iPhone: landing & winders — Pro²
New L-shaped and U-shaped stair calculators handle winders or landings, flight-by-flight results, comfort checks, detailed plans, elevations, tread layouts and PNG/PDF export.
Brickwork & blockwork
- Added the new Brick & Block Wall Calculator.
- Improved Straight Stairs input fields and result layout.
- Added PNG/PDF export support for the new wall calculator.
- Improved input behaviour, haptics, localisation and overall stability.
Straight stair calculator for iPhone — Pro²
- New stair diagram with rise, going, pitch, and stringer length
- Choose what you know: going or total run
- Adjustable number of risers with automatic layout updates
- Comfort check using the classic 2 × rise + going rule
- Headroom & floor opening check for upper-floor clearance
- Step diagram for riser height and going
- Stringer set-out table with rise, going, and stringer marks
- Improved Metric and Imperial support
- Better PNG/PDF exports with diagrams and set-out data
Spiral stair calculator for iPhone: radius, rotation & treads — Pro²
New: Spiral Stair Calculator
Plan spiral stairs from total rise, ideal rise, inside radius, tread length and total rotation. Calculate risers, treads, actual rise, angles, stringer lengths, vertical separation, arcs, chords and outside diameter.
Review top, tread and side diagrams with a detailed measurement table for every tread. Work in Metric or Imperial units and export the layout as PDF or PNG.
We have also improved stair navigation and refined terminology throughout the app.
Pro² 1.7
Added 11 new languages: Bangla, Gujarati, Kannada, Malayalam, Marathi, Odia, Punjabi, Slovenian, Tamil, Telugu and Urdu. Improved Quick Calc and construction measurement input, with better support for metric and imperial units, feet, inches and fractions. Calculators now keep entered values and selected units more reliably when moving between screens. We also fixed baluster quantity controls, the imperial keyboard layout for right-to-left languages and several interface issues.
Quick Calc
Quick Calc now supports feet, inches and fractions for construction measurements. Add, subtract, multiply and divide mixed dimensions. We also fixed a layout issue that could cut off the right side of Quick Calc with accessibility button outlines enabled.
Concrete slab
Improved Imperial units in construction calculators: volume results can now switch between ft³ and yd³, feet/inches input remains available with a new yards option, Concrete Slab, Concrete Piers/Post Holes, Soil, Gravel and Asphalt calculators were updated, Soil and Asphalt now support US tons and lb, and value formatting and calculation stability were improved.
Paint
Added a paint coverage calculator: enter wall size, ceiling/floor, doors, windows, number of coats and paint coverage to see exactly how many gallons or litres you need. You can now switch units (mm, cm, m) directly inside the calculators, based on user requests from the in-app chat.
Pro² 1.3
Unit Converter widget now available. Add it to your Home Screen to convert length, area, volume and more in one tap — without opening the app.
Pro² 1.2
Small improvements and fixes to the existing calculators.
Pro² 1.1
Small improvements and fixes to the existing calculators.
Pro² 1.0
First public release. The original list of features could not be recovered.
Bring Pro² to your next job.
Use your own measurements for stairs, concrete and materials. Keep the calculations together on your iPhone.
For iPhone · iOS 18 or later
View Pro² on the App Store
Scan with your iPhone camera.Free to download.