BuildCalc is a ready-to-publish iOS app for builders, contractors, engineers and homeowners. Enter dimensions and get material quantities and cost straight away, with a labelled diagram and the step-by-step working behind every number. Pure SwiftUI, fully offline, no dependencies.
10 calculators
- Concrete volume: slab, isolated / combined / stepped footing, rectangular and round column, beam, wall, staircase. Number of members, wastage, ready-mix or site-mixed.
- Mix design: M10, M15, M20, M25 or custom ratio. Cement bags, sand, aggregate, water.
- Water–cement ratio: from cement bags or concrete volume, with exposure guidance.
- Steel / rebar: weight by diameter (6–32 mm, D²/162), several bar sizes, kg and tonnes.
- Bricks & blocks: modular, traditional, AAC, concrete block or custom size. Door and window deductions, mortar cement and sand.
- Mortar: 1:3 to 1:8.
- Plaster: internal, external or ceiling. 6–20 mm, openings deducted.
- Flooring & tiles: tiles and boxes, skirting, adhesive bags, grout.
- Paint: whole room or single wall, ceiling, coats, primer, putty, and which tin sizes to buy.
- Excavation: trench, pit or plot. Cut with soil swell or fill with compaction, plus truck loads.
Cost estimating
- Editable rate list per city for materials and labour
- Prices in site units: per bag, cft, brass, kg, tonne, sq ft, 1,000 bricks…
- Cost on every result, room and project totals
- 21 currencies
Projects & sharing
- Group calculations by project and room
- Reopen any item, change it and update it in place
- Share an estimate as text (WhatsApp, email…)
- Every calculation is saved automatically in a searchable history
Built for real sites
- Metric or imperial everywhere. Type 10 6, 10' 6", 10 ft 6 in or 250mm
- Unit converter: length, area (incl. gaj, acre), volume (incl. brass), weight, density
- Wastage advisor with recommended defaults
- 8 languages: English, Hindi, Marathi, Gujarati, Tamil, Telugu, Kannada, Bengali
- Dark mode, Dynamic Type, iPhone and iPad
- Works fully offline. No account, no server, no tracking
For developers
- 100% Swift and SwiftUI, no third-party libraries
- Clean structure: a pure-Swift calculation engine separate from the UI
- Engine tests included (Tests/run-engine-tests.sh)
- Saved data survives app updates; unreadable data is backed up, not lost
- Rebrand from one config file. Guide included for adding new calculators
- Branded launch screen: swap one logo and one colour in the asset catalog, no code
- Debug launch options to produce App Store screenshots with sample data
- "Data Not Collected" privacy label; export compliance pre-set
Requirements
- Xcode 26 or later
- iOS 17.0 or later
- An Apple Developer account to publish
What's included
- Full Xcode project source
- Engine tests and a run script
- HTML documentation: install, rebrand, configure rates and currencies, add languages, add a calculator, publish to the App Store
- 1024 × 1024 app icon
Not included
PDF quotations, Excel/CSV export, bar bending schedule, roofing, iCloud sync, widgets, in-app purchases or ads.
Note for buyers
Results are estimates based on standard thumb rules (IS-code site practice). Quantities should be confirmed by a qualified engineer.
Support: eeshu161286@gmail.com
Need it rebranded and published?
I can reskin this app with your name, logo and colours, add your own rates or calculators, and submit it to the App Store for you. Message me through my CodeGrape profile for a quote.
$29
| Created | 25 Oct 2026 |
| Package Includes | N/A |
| File Size | 897 KB |
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