Blackstoneby Cakglo Ltd, London
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Construction & Site Safety

Leave the site with the report already done.

The whole site inspection — in your pocket, offline.

GPS-stamped photos · SACS / OSHA / ISO 45001 templates · branded Word/PDF reports in 30 seconds.

  • No credit card
  • Cancel anytime
  • Hosted in Germany
  • 9-language UI, incl. Arabic RTL

Set up your first inspection in under 5 minutes. No call required.

Site engineer running a Blackstone inspection checklist on a phone on an active construction site
Just launched — the Blackstone construction inspection app is live 14-day free trial · no credit card Built for SACS / OSHA / ISO 45001 workflows Works fully offline on remote sites GPS-stamped photo evidence Word & PDF reports in 30 seconds Hosted in Germany · GDPR compliant Cancel anytime
This is the actual app

No stock photos. No mockups.
Real screens from active sites.

Add a new construction site in the inspection app

1 · Add your site

Choose inspection template — Daily HSE, Concrete QA/QC, Snagging List

2 · Pick a template

Inspection checklist with pass, fail, N/A and photo upload

3 · Inspect & photograph

Report ready — download Word or PDF, auto-email to client

4 · Generate the report

Built for the field

Three things that change how site teams work.

Works offline

Remote sites have no signal. The app captures everything on-device — checklists, photos, GPS, signatures — and syncs the moment you're back online. No lost data.

GPS-stamped photos

Every photo is timestamped and geo-tagged automatically, embedded in EXIF metadata. Your audit trail proves what was inspected, where, and when.

Word/PDF in 30 seconds

Audit-ready reports from your own branded template. The client gets the PDF before you've packed up the truck. No more weekends retyping notes.

How it works

From boots on site to report in inbox.

Three steps. Five minutes the first time. Two minutes after that.

1

Pick site & template

Open the app on your phone. Pick your site — or add a new one in seconds. Choose a checklist: Daily HSE Walk, Concrete Works QA/QC, Snagging List or Handover. All templates are included; Pro plans let you build your own.

2

Inspect & photograph

Walk the site and mark each item Pass / Fail / N/A. Add photos — GPS coordinates and timestamp are attached automatically, even with no signal. Voice notes if your hands are dirty. Severity-tag defects as you go.

3

Sign & deliver

The inspector signs on the device. One tap generates a Word or PDF report from your branded template and emails it to the client and project director — before you've left the site. The audit trail is saved forever.

What is a construction inspection app — and why switch from paper?

A construction inspection app replaces paper checklists, camera rolls and retyped Word reports with one mobile workflow: digital checklists, photo evidence captured in place, and reports generated automatically. Blackstone is built specifically for construction and site safety — not a generic form builder.

  • Hours back every week. A typical daily HSE walk takes 4 hours with paper, photos and retyping. With checklists and auto-generated reports it takes minutes — the report is done when the walk is done.
  • Evidence that holds up. Paper notes and gallery photos can't prove where and when something was inspected. GPS and timestamps embedded in every photo's EXIF data can — for ISO audits, client disputes and insurance claims.
  • Nothing gets lost. Paper gets wet, Excel files fork into five versions. Every inspection lives in one system, synced and exportable — and works offline until you're back in signal.
  • Defects actually get closed. Severity scoring, subcontractor assignment and live status replace the Sunday-evening chasing emails. You see what's open, who owns it, and since when.
  • Compliance built in. SACS, OSHA and ISO 45001 structures come as ready templates — instead of building checklists yourself from the standard documents.
Made for your role on the site

Same app. Different defaults.

Site Manager

“My day starts on the site, not at the desk.”
  • Walk + photograph from your phone
  • Offline mode for remote sites
  • Daily report sent in 2 minutes
  • Voice notes if your hands are dirty

QA / QC Engineer

“I need an audit trail for the next ISO inspection.”
  • Severity scoring (low / medium / high)
  • Defect register exportable to Excel
  • Subcontractor assignment + status
  • SACS / OSHA / ISO 45001 templates

EPC / General Contractor

“I run 15 projects across 3 countries.”
  • Multi-site dashboard
  • API access — push to your ERP
  • SSO + role-based permissions
  • White-label reports for clients

Honest comparison — including what we don't have.

FeatureBlackstoneSafetyCulturePlanRadar
Starting price (per user / month)£20£24£39
GPS-stamped photosincludedadd-onyes
SACS templates (KSA Aramco)includedbuild yourselfbuild yourself
White-label Word reportsfrom your templatePro planEnterprise plan
EU data residency (Frankfurt)defaultopt-inyes
Arabic UI + RTLnativepartialpartial
BIM / 3D model integrationnot yetnoyes

We don't have BIM yet. We don't have 500 integrations. We have a lower price, GPS by default, SACS templates, and a real human on the support line.

See full pricing & plans or try it free first
14-day free trial

Try it on your next site walk.

14 days, every feature, unlimited inspections. No credit card, no sales call, nothing to cancel if it's not for you.

  • Hosted in Germany (Frankfurt)GDPR by design. Full data export, deletion 30 days after cancellation.
  • Built for SACS · OSHA · ISO 45001Templates included: Daily HSE Walk, Concrete QA/QC, Snagging List, Handover.
  • UK-registered companyCakglo Ltd, London. We write the code and answer the support emails ourselves.

Create your free account

No credit card. Your 14-day trial starts immediately.

Questions we'd ask if we were buying

Honest answers, no marketing fluff.

Does it really work offline?

Yes — full read/write offline. Photos, checklists and defects are stored on-device until the next sync. We test in airplane mode every release. Built for remote sites where signal is unreliable.

Are photos GPS-stamped automatically?

Yes — every photo captures GPS coordinates and a timestamp at the moment of capture, embedded in EXIF metadata and overlaid on the report. A defensible audit trail by default.

What templates are included?

Daily HSE Walk (32 items, 6 sections), Concrete Works QA/QC (24 items pre/during/post-pour), Snagging List (38 items, 7 trades), Handover Checklist (29 items). All built for SACS / OSHA / ISO 45001. Custom templates on Pro and Enterprise plans.

Can I use Blackstone as a snagging app?

Yes — the 38-item snagging list template covers 7 trades. Walk the site, attach GPS-stamped photos to every snag, assign severity and trade, and hand the contractor a branded Word or PDF snagging report before you leave. Works fully offline.

Can I use my own branded report template?

Yes — on Project Pro and Enterprise plans. Upload your branded Word template once; every report generates from it. No design fee, no setup charge.

What happens to my data if I cancel?

Full export in JSON, Excel and PDF before you cancel. Data is deleted from our servers 30 days after cancellation (GDPR Article 17). No lock-in tactics.

Does it support Arabic and RTL — and which languages?

Yes — full RTL UI in Arabic, plus English, German, Spanish, Turkish, Italian, Korean, Hindi and Japanese: 9 languages in total. Built for KSA, UAE, Qatar, Kuwait, Bahrain, Oman and the EU markets from day one.

How is this different from a free Google Form?

Forms can't do offline, GPS-stamping, photo annotation, severity scoring, subcontractor assignment, branded Word exports or audit-locked timestamps. Try one inspection on a real site — the difference is obvious.

What happens after the 14 days — and how do I buy?

Pick a plan from £20/month (Site Solo, 1 user) and pay by card, SEPA, PayPal or invoice — see the pricing page. If you don't buy, you are not charged: your account pauses and your data stays exportable for 30 days.

Stop typing reports on weekends.

14-day free trial. No card. No call required. First inspection set up in under 5 minutes.

Start free trial