Comparison

Smart Obra vs Concrete & Stair Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Smart Obra

Features
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Aqui está o texto formatado em linha única, sem quebras, ideal para ser colado no campo de descrição completa e resolver o erro de política de metadados: O Smart Obra é a ferramenta definitiva para o gerenciamento e registro detalhado do dia a dia no canteiro de obras. Desenvolvido para facilitar a rotina de engenheiros e mestres de obra, o aplicativo permite o acompanhamento em tempo real de todas as etapas da construção, garantindo que nenhum detalhe seja esquecido e que os prazos sejam cumpridos com precisão. Recursos Principais: Diário de Obra Digital para registrar atividades diárias, ocorrências e o progresso físico de cada etapa; Controle de Recursos para lançamento de mão de obra e equipamentos utilizados; Gestão de Materiais para controle de recebimento e utilização; Relatório Diário de Obra (RDO) gerado automaticamente com base nos lançamentos; Fluxo de Aprovação pelos líderes diretamente pelo app para garantir a integridade das informações; e Monitoramento de Prazos para acompanhar datas e o avanço das etapas da obra. O Smart Obra elimina a necessidade de papéis e planilhas complexas, centralizando toda a gestão em um só lugar para uma tomada de decisão mais segura e transparente

About

Concrete & Stair Calculator

This app provides over 70 construction trade calculations, displaying results in 3D with dimensions. It adapts to local units and rules, offering an AI assistant for job site questions. Organize calculations by project for easy access.

Highlights
  • 70+ trade calculations
  • 3D result visualizations
  • AI job site assistant (Pro)
  • Offline calculations
  • Project organization
  • Unit and rule adaptation
Features
Read full description

Blok is the calculation tool for the modern job site: over 70 trade calculations in your pocket, results drawn in 3D, and Barto, the beaver assistant who answers your job site questions. Built for masons, concrete finishers, roofers, tile setters, drywallers, electricians, plumbers, painters and serious DIYers. THE RIGHT NUMBER, FIRST TIME Pick a trade, enter your measurements: concrete, cement bags, blocks, tile, paint, roof pitch, wire size… The result appears in seconds, with the quantities to order and the points to watch. THE RESULT IN 3D Slab, wall, stairs, roof: what you calculate is drawn in 3D, dimensions included, so you can check everything at a glance before you order. FEET OR METERS, YOUR LOCAL RULES Work in feet and pounds or in meters and kilos. Bag sizes, voltage, installation rules: Blok adapts to the country you choose. BARTO, YOUR JOB SITE ASSISTANT (BLOK PRO) A question about a mix, a slope or a wire size? Barto answers and opens the right calculation, already filled in. He needs an internet connection and can make mistakes: always double-check. YOUR JOBS, ORGANIZED BY PROJECT Keep every calculation for a job in one place and find any number in two taps. THE 10 MODULES MASONRY: concrete volume (slab, round column, stairs, wall, footing), concrete and mortar mix, cement bags, blocks per area, full slab, screed. DRYWALL: panels, screws, tape and mud, studs and tracks, R-value, U-factor. TILING: tile per area, waste, thinset, grout, baseboards, floating floor, vinyl flooring, diagonal layout. PAINTING: wall and ceiling area, paint quantity, primer, wood finish. ROOFING: pitch, rafter length, gable or hip roof area, tiles and slate, battens, lumber sizes, gutters and downspouts, underlayment. ELECTRICAL: Ohm's law, power, wire size, voltage drop, circuit check. PLUMBING: water heater, pipe size, drain slope, radiator and boiler output, head loss. EARTHWORK: excavation, swell factor, tonnage, truckloads, drain slope. GEOMETRY: areas, volumes, Pythagorean theorem and 3-4-5 squaring, trigonometry, proportions. CONVERSIONS: length, area, volume, weight, temperature, pressure, power, feet and inches, AWG… NO SIGNAL NEEDED, NO ADS Calculations work offline, in a basement or out in the middle of nowhere. No account to create. No ads. FREE OR PRO The free version gives you 10 credits to start, then 3 more every Monday, up to 10 (one calculation = one credit). Blok Pro unlocks unlimited calculations, Barto, unlimited projects and favorites, and your calculation history. Monthly or yearly subscription: the price is shown before any purchase. DISCLAIMER Blok's results are indicative. They do not replace local building codes or the advice of an engineer. For any work that affects safety, consult a qualified professional. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel at any time in your Apple Account settings. Terms of Use: https://blok.devolim.fr/en/legal/terms.html Privacy: https://blok.devolim.fr/en/legal/privacy.html Support: contact.blok@devolim.fr Blok is published by DEVOLIM (BAUGEY MATHEO), a French sole proprietor. SIREN 948 000 757, RCS Bordeaux.

Screenshots

Smart Obra3 screens
Concrete & Stair Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: Smart Obra at none against Concrete & Stair Calculator's 3. On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Concrete & Stair Calculator sells 3 in-app purchases, starting at $2.99 per month. Smart Obra asks for nothing beyond the download.

UpkeepUpdate frequency

Smart Obra ships an update every 2 months, Concrete & Stair Calculator every 5 weeks. Both last shipped on October 28, 2026.

Scorecard1 real difference · 7 level
Smart Obra versus Concrete & Stair Calculator: the parameters behind the verdict, then further details
ParameterSmart ObraConcrete & Stair Calculator
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size39 MB42 MB
Age rating17+4+
DeveloperVision360 InnovationsDevolim

In-app purchases

None

Smart Obra

No in-app purchases

3 purchases

Concrete & Stair Calculator

Subscriptions2
  • Blok Pro Monthly$2.991 Month
  • Blok Pro Yearly$17.991 Year
One-time1
  • Blok Pro Lifetime$29.99

Questions

Is Smart Obra free?
Smart Obra is free to download, with no in-app purchases.
Is Concrete & Stair Calculator free?
Concrete & Stair Calculator is free to download, with in-app purchases available.
Do Smart Obra or Concrete & Stair Calculator have ads?
Neither Smart Obra nor Concrete & Stair Calculator shows ads.
Which is updated more often, Smart Obra or Concrete & Stair Calculator?
Smart Obra ships an update every 2 months, and Concrete & Stair Calculator every 5 weeks. Most recently, Smart Obra was updated on October 28, 2026 and Concrete & Stair Calculator on October 28, 2026.

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