ConstruCalc vs HTML Previewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ConstruCalc
Accurately estimate building materials and quantities for construction and renovation projects. Avoid waste, improve budgets, and reduce costs by precisely calculating needs for concrete, walls, floors, tiles, and more.
- Material quantity calculation
- Concrete estimation
- Wall and floor material calculation
- Tile and flooring estimation
- Staircase and plaster calculation
- Paint and PVC material needs
- Useful construction tables
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Are you going to build or remodel? Have you estimated the expenses? When the subject is construction the costs of the work almost always extrapolate the budgets. The calculation of building material such as material needed to make a wall, a floor, tile, build a staircase, etc. are not always accurate and errors in the purchase of the material generate waste and can increase the cost of a work or renovation. Have you considered accurately managing the inputs of your work? Well this reality is already possible through ConstruCalc! You can estimate more accurately the building materials and their respective quantities that will be used in your work, so you avoid waste, improve your budget and reduce the cost of the work. This application assists you in calculating the materials needed to: - Concrete (Amount of concrete, volume of gravel, volume of cement, volume of sand, volume of water) - Wall (brick quantity, block quantity, amount of solid brick, mortar volume of settlement, volume of sand, calculation of plaster), besides the possibility to select the position, standing brick or lying brick - Thick Floor (Volume of cement, volume of sand, volume of gravel) - Complete Floor (Volume of cement, amount of floor, amount of ceramic or porcelain tile, subfloor of regularization, volume of mortar, volume of grout, baseboard) - Laminate Flooring (Quantity of laminate flooring, baseboard, PVA mass for leveling and floor covering) - Vinyl Floor (Quantity of vinyl floor, baseboard, PVA mass for leveling and glue) - Liquid Porcelain (Volume of epoxy resin, hardener, sealer and pigment for Primer and Finishing Options: 3D or ordinary liquid porcelain) - Interlocked floor (Pavi's, Pisogram S, 16 Faces, Rectangle, Hex or Block, Racket, Double T and 3 Tips) - Tile (Tile quantity, grout volume, settling mortar volume) - Pastilles (Quantity of ceramic or porcelain paste, volume of grout, volume of mortar) - Ladder (Number of steps and volume of concrete.) Ladder options: Straight staircase, straight staircase with landing, L-shaped staircase and U-shaped staircase) - Plaster (Amount of gypsum) - Plaster (Quantity of material required for the internal and external lining, including slab, plaster and plaster) - Paint (quantity or volume of paint, volume of sealer, volume of varnish, quantity of mass, quantity of coats) - PVC (Quantity of PVC liner, PVC modular board and PVC partition) - Tile (Quantity of ceramic, cement, asbestos or metallic tiles and number of ridges) - Useful Tables: NBR6118, NBR6120 and practical table with concrete traces for use in works (Caldas Branco) - Foundation, Beam, Pillar and Floor. - Ceramic slab and EPS slab. - Stairs, Hardware and Wood. Suitable for all who work with civil construction, such as bricklayer, painter, gossip, civil engineer or even who is lay in the subject. ConstruCalc is the solution you need for your work. It is now possible to request a quote near your home. If you work in the civil construction area, you can indicate your services and get more jobs through Habitissimo. Available in four languages: Portuguese, Spanish, English and French. Save already, your pocket thanks! Follow the updates: http://www.tresium.com.br https://www.facebook.com/tresium
HTML Previewer
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Open received HTML and ZIP reports, read Markdown notes, and inspect JSON or YAML on iPhone and iPad. Files are processed on your device. Read the content, keep the formatting - View HTML layouts, graphics, and animations. - Read Markdown tables and highlighted code, with one-tap code copying. - Display Markdown math equations and Mermaid diagrams offline. - Browse HTML and Markdown pages inside ZIP reports with local CSS and image assets. - Search within HTML and Markdown, navigate headings, adjust reading appearance, and reopen at your saved reading position. Inspect JSON and YAML - Expand nested objects and arrays, search fields and values, and check highlighted source with line numbers. - Copy values or field paths and jump to the corresponding source line. - View and copy large JSON numeric IDs without rounding their digits. - Locate syntax errors by line and column. YAML also supports multiple documents. Import, organize, and share - Open files from Files, Mail, AirDrop, messaging apps, cloud drives, or other apps. Open/share menu availability depends on iOS and the source app. - Select multiple documents or ZIP packages. Update duplicates, keep both copies, or skip individual files, then review import results. - Paste HTML, Markdown, JSON, or YAML text to create a local preview. - Find saved files by filename, pin frequent documents, and rename display titles. - Share original files or complete ZIP packages. Export HTML and Markdown previews as PDF. - Try the built-in HTML, Markdown, JSON, YAML, and ZIP samples. Supported extensions: .html, .htm, .md, .markdown, .json, .yaml, .yml, and .zip. JSON and YAML previews are read-only and share the original file. JSONC comments and trailing commas are not supported. PDF export is available for HTML and Markdown. Privacy and purchase Files are processed on device; the app does not upload your files. No account or ads. Paid download with no subscription or in-app purchase. New HTML files, including HTML inside ZIP packages, open in Interactive mode with page JavaScript and external resources enabled. The HTML content can make network requests. Select Safe Preview to block page scripts and external HTTP/HTTPS resources. External navigation and form navigation remain blocked in both modes. Saved preview choices are preserved when reopening files.
Screenshots
Verdict
The clearest difference is price: ConstruCalc at Free against HTML Previewer's $5.99. ConstruCalc also leads on iOS requirement (15.6 vs 17.0). HTML Previewer's advantage is update cadence (every 4 days vs every 5 weeks). On ads, in-app purchases and device support 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
ConstruCalc is free to download; HTML Previewer costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ConstruCalc ships an update every 5 weeks, HTML Previewer every 4 days. The most recent releases landed on September 30, 2026 and October 11, 2026 respectively.
| Parameter | ConstruCalc | HTML Previewer |
|---|---|---|
| Price | Free — better | $5.99 |
| Rating | 3.4 (7 ratings) — better | — |
| Positive reviews | 76.9% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 5 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 43 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Marcus Borges | SHIFENG ZHANG |
In-app purchases
ConstruCalc
No in-app purchases
HTML Previewer
No in-app purchases









