- New Room Planner (2D/3D): draw wall plans with doors and windows using exact length entry, place furniture from a 44-item catalogue, view the room in 3D with camera presets and wall colours, and get an estimate with a shopping list and PDF report. Projects are stored offline; AI hints are optional. - Nine new on-site tools: level and inclinometer (with a camera plumb line), metal detector, height meter, compass, sound meter, 3-4-5 corner layout, material converter, lux meter (Android) and plot area by GPS. Phone sensors are consumer-grade — check finishing work with a real instrument. - "How it's calculated": an expandable block under the result with the formulas and your own numbers substituted — every step visible. Now in 13 calculators. - Editable material prices: tune prices to your market — values persist for later calculations, and "Reset to defaults" restores the originals. - Project estimate: a cost summary across every saved calculation with PDF export, alongside actual expense tracking with partial payments and a comparison against the estimate. - Tiles in one calculator: seven cards merged into "Tile calculation". Enter the area in m², derive it from the floor or from the room walls; glue, grout and weight are expandable sections. The formulas are unchanged. - Lumber without the clutter: board, timber, block house, clapboard, timber imitation, OSB, plywood, tongue-and-groove floor and battens — one card per material with a Simple / Surface / Room mode switch. - Extended metal weight calculator: 12 metals, new profiles (square, hexagon, angle, channel, T-bar) and results in kg, grams, pounds or ounces. - New brick/block fence calculator: posts of 1.5×1.5 or 2×2 bricks at your spacing, spans in ½/1 brick or 390×190×190 block — counts including reserve, and cost. - Added a lighting calculator and screed modes (room, simple, by area) with flexible geometry entry. - The bottom tabs now behave like real tabs: switching does not stack history, and Back leads to Home. - Catalogue trimmed: rarely used plumbing, electrical, underfloor heating, insulation and metal calculators are gone — what remains is what people actually need. Saved calculations stay in your history under the same names. - Expanded calculation history and saving, fully localised in 6 languages.

- Added new roof calculators and expanded roof geometry support (gable, canopy, T-shaped, hip/T-hip, L-shaped, shed) with improved 3D layouts. - Added sheet layout visualization improvements, including numbering and clearer legends/subtitles for multi-slope roofs. - Added a metal cutting-stock optimizer with SVG cut layout visualization for linear material planning. - Improved 3D quality across multiple calculators (stairs, plumbing, masonry, drywall, and roof scenes). - Improved masonry visuals with more realistic bonding and higher-contrast mortar seams. - Improved drywall experience with a unified visualization scheme across drywall calculators. - Fixed web animation-driver compatibility warnings and updated dependencies for the 1.0.2 release.