PakNest Construction Toolkit is a fully offline, professional-grade construction utility suite built for builders, contractors, architects, and property owners operating in Pakistan — specifically optimized for Capital Development Authority (CDA) Islamabad regulations.

No account, sign-up, login, or internet connection is required at any point. Every feature works 100% offline from the first launch.

KEY FEATURES:

1. Material Estimator
Calculates the physical construction materials required for any built-up area entered in square feet. Instantly computes:
- Cement bags required (area × 0.4 per 50 kg bag)
- Steel / rebar tonnage (area × 0.002 tons)
- Brick count (area × 12 standard bricks)
Results appear on animated result cards with a single tap. A reference note reminds users that 1 Marla = 272.25 sq ft.

2. Concrete Mix Calculator
Supports four standard mix ratios used across Pakistani construction sites:
- 1:1.5:3 — M20 grade (columns and slabs)
- 1:2:4 — M15 grade (general purpose)
- 1:3:6 — M10 grade (blinding and lean concrete)
- 1:1:2 — M25 grade (high-strength and water tanks)
Enter the total volume in cubic feet and the calculator instantly returns the exact dry volumes of cement, fine aggregate (sand), and coarse aggregate required, applying the industry-standard 1.54 wet-to-dry conversion factor.

3. CDA Bylaws Reference (Islamabad)
A comprehensive, searchable offline reference for Capital Development Authority (CDA) building bye-laws, sourced from the CDA Building Bye-Laws 2020 and Zone IV Residential Regulations (2021 revision). Organized into four tabs:
- Setbacks: Front, rear, side, corner plot, nullah, and high-tension line clearances
- Height Limits: Maximum permissible floors and heights for all plot sizes across Zone II and Zone IV, including high-rise definitions and Margalla Hills buffer rules
- Plot Coverage: Maximum ground floor coverage percentages by plot size, FAR calculation guidance, and courtyard exemptions
- General Rules: Permit requirements, structural standards, seismic zone compliance, fire safety, environmental provisions, and penalty clauses
All content is embedded directly in the app — no server, no PDF, no internet needed.

4. Unit Converter
A real-time, bidirectional area converter for the land measurement units used in Pakistani property transactions and construction documentation:
- Marla, Kanal, Square Yards, Square Feet
Type any value in any field and all other units update instantly. Built on Government of Pakistan standard definitions (1 Marla = 272.25 sq ft; 1 Kanal = 20 Marla). Includes a quick-reference conversion table.

5. Milestone Build Checklist
An interactive, phase-by-phase construction progress tracker covering the full residential build cycle:
- Excavation and Site Preparation (6 tasks)
- Foundation (6 tasks)
- Columns and Structural Frame (6 tasks)
- Roof Slab (7 tasks)
- Brickwork and Masonry (6 tasks)
- Plastering and Finishes (9 tasks)
Each task can be checked or unchecked individually. Progress is saved locally using on-device storage and persists across app restarts. An animated progress bar shows overall completion percentage. A reset option clears all progress after confirmation.

TECHNICAL DETAILS:
- Built with Flutter (Material Design 3)
- Supports light and dark appearance, following the device system theme automatically
- Locks to portrait orientation
- Requests zero permissions: no internet, no location, no camera, no storage access
- All data embedded in the app binary — no external dependencies at runtime
- Compatible with Android 5.0 (API 21) and above

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Signing Information:
Keystore file : android/app/key15.jks
Key alias : mykey15
key.properties: android/key.properties
(Never commit key.properties or key15.jks to version control)

Build Commands:
APK : flutter build apk --release
AAB : flutter build appbundle --release
Install on device: flutter install -d --release