Estimate on site—even offline. BlockToBlock is available on iPhone and Android.

Low-connectivity sites

Keep estimating when the connection disappears.

A site tool becomes a liability when measurements or project records depend on continuous connectivity.

The field problem

Make every assumption visible before it becomes a purchase.

A resilient workflow designed around local data first, with optional connectivity added carefully.

  1. 1
    Prepare prices before travelling

    Check this stage with the person responsible before continuing.

  2. 2
    Calculate and save locally on site

    Check this stage with the person responsible before continuing.

  3. 3
    Review the result with the crew

    Check this stage with the person responsible before continuing.

  4. 4
    Export when the job is ready—not when the network allows

    Check this stage with the person responsible before continuing.

Try this workflow now

Use the live low-connectivity sites simulator.

Change the working assumptions, review the quantities and download a portable starting file without creating an account.

Choose the job

Measurements Production mixes Purchasing and logistics
Online

No account. No upload. Inputs remain on this page.

Quick calculator

Boundary wall

Saved locally 0
Net wall area
Indicative blocks
Material starting cost
Assumptions to review
    See a professional estimate

    Planning aid only. Verify dimensions, structural requirements, mix design, coverage, waste, purchasing units and site conditions before ordering or building.

    BlockToBlock principle

    Fast does not mean automatic approval.

    Calculations organise the information you provide. The estimator remains responsible for measurements, specification, prices, constructability and site decisions.

    Read the calculation methodology →