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

Ready

Connected estimating workflow

From checked scope to purchasing and lessons learned.

Everything in this workspace remains in this browser unless you download a document, backup or exchange file.

Checking offline readiness…Storage usage unavailableNo backup recorded
Scope items00 optional
Estimated totalincluding adjustments
Purchase progress0%by required lines
Actual variancerecorded costs

Project identity

Market, language and measurement context

Location is manually controlled and remains on this device. Exact home coordinates are never required. Regional templates are editable working defaults, not official rates or regulatory advice.

Site photographs and references

Stored only in this browser and included in backups. Maximum 1.2 MB per image.

Continue the job

Project notes and site assumptions
MeasurementsCalculationsBoQEstimatePurchasingActualsLessons

Traceable measurement sources

Change a checked input and update its linked BoQ lines.

Each calculation retains normalized inputs, rules version, revision and downstream links.

Multi-calculation project

Scope items become one consolidated BoQ.

Add walls, slabs, roofs, materials, labour, plant or transport. Every assumption stays editable.

Section / itemQtyUnitRateWasteTotalActions

Context-aware Local Marketplace

Compare available offers for this project’s location.

Supplier and equipment records are user-entered or catalogue-imported. Dates, coverage, delivery and verification state stay visible.

Suppliers and service areas

Add or update an offer

Columns: supplier, item, category, unit, unitPrice, deliveryFee, city, locality, radiusKm, checkedAt.Business discovery data © OpenStreetMap contributors. Coverage varies by area; verify listings before contact or travel.

Supplier catalogue

Standardised products and availability

Competitive quotation

Request comparable delivered prices

Local Marketplace confidence

Verification, reviews and alerts

Reusable local knowledge

Price books and assemblies owned by the estimator.

Rates are local working values with dates—not an official or live supplier catalogue.

Local price book

ItemUnitPriceUpdated
Price change history

Assemblies

Add a reviewed group of lines to this project, then adjust its quantities and prices.

Purchase and delivery control

Turn required quantities into an accountable buying plan.

Package rounding, supplier, order state and consumed quantities remain visible.

Required itemRequiredPack sizeOrder qtySupplierStatusDeliveredConsumed

Purchase orders

Delivery events

Estimate-to-actual learning

See whether quantity, price or delivery assumptions moved.

Record actual quantities and rates against the same BoQ lines instead of comparing only headline totals.

ItemEst. qtyActual qtyEst. rateActual rateVarianceReason
Estimated
Recorded actual
Variance

Job performance record

Project audit trail

Understand what changed, when and why.

Local activity records support review; they are not a tamper-proof legal audit log.

Professional document designer

Issue a document that explains the total.

Commercial lifecycle

Move from quotation to approval, variation and payment record.

Commercial events remain reviewable and locally stored. Payment records do not move money.

Document register

Client approval

Variations

Invoices and credit notes

Deposits and payments

Records only. No payment provider is contacted.

Project execution

Plan the work, record the site and keep material movement visible.

Programme, tasks, labour, equipment, inventory and site evidence remain connected to the same project.

Programme and milestones

Task editor

Labour and equipment

Site inventory

Daily diary

Inspections and snagging

Progress valuation

Human-reviewed takeoff

Measure drawings manually before automation is allowed to suggest anything.

Upload a local PDF or image reference, calibrate scale, record distances, areas or counts, then explicitly accept each BoQ transfer.

of 1Scale and annotations are stored per drawing revision and page.

Drawing and scale

No drawing selected. Files remain on this device.

Choose a tool, then click points on the drawing.

Scale not calibrated.

Reviewed measurement

Controlled assistance

Local rule-based estimate review

Runs deterministic checks in this browser. No project data is sent to an AI provider.

Future approved AI provider controls

Provider execution remains disabled until credentials, retention terms and server-side controls are configured.

Optional collaboration foundations

Prepare a review pack without requiring an account.

Roles and assignments are local labels. No organisation, invitation or cloud permission is created here.

Local review roles

Permission preview

Assignments

Comments

Approval gates

Integration centre

Standards-based adapters work locally. Authenticated provider actions remain disabled until credentials, consent, webhooks and server-side verification are configured.

Read the portable-format boundary

Backup and recovery

Keep local ownership practical over time.

Preview imported files, choose merge or replace, and retain revision history. Replacing is never performed without a confirmation step.

Portable backup

Passphrase backups use browser AES-GCM encryption. Lost passphrases cannot be recovered.

Restore preview

No file selected.

Revision history

Storage and update controls

Preparing resilient browser storage…

Accessibility and device self-check

Automated checks support—rather than replace—independent WCAG and real-device testing.

Four-minute orientation

Build one connected local estimate

  1. Name the project. Set client, location, currency and region.
  2. Add scope. Use assemblies or create individual BoQ lines.
  3. Plan purchasing. Round packages and record deliveries.
  4. Compare actuals. Save the lesson for the next job.
  5. Issue and back up. Download the PDF and a portable recovery file.