Offline mode
This device only: your records never leave the phone and no internet is needed. Back up with a JSON export whenever you like.
No cloud · JSON backupWorks without signal · syncs when you’re back online
Run your construction site from your pocket. Even offline.
StructurePrime puts attendance, production, concrete, cash, subcontractors and inspection records into one app built for the field. Photos carry their GPS position and time, and evidence can be digitally signed — so a record shows where and when it was made.
- 56modules
- 22languages
- RSA-2048signed evidence
- Offlineor online — you choose
Built for
- Contractors
- Site chiefs
- Site engineers
- Foremen & timekeepers
- Site accountants
- Project managers
- Safety officers
- Self-builders
56 modules
Everything a site needs, grouped the way a site works
From the daily roll call to the subcontractor contract. Open a group to see its modules — each one has its own page with what it records and why.
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8 modules
Site management
Sites, buildings and blocks, subcontractors, crews, drawings, utility connections and accounts, specialist works.
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4 modules
Daily operations
Attendance, work progress, internal transfers and material usage — the entries made every day.
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8 modules
Finance
Cash book, payables and receivables, cheques, fees, budget vs actual, cash flow forecast, cost alerts and profitability.
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10 modules
Materials & logistics
Concrete pours, goods received, supply list, suppliers, purchase requests, parcels, vehicles, rented equipment and a QR warehouse.
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4 modules
Official & legal
Building permits, contracts with progress payments, site handover records and the key documents.
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9 modules
Quality & inspection
Samples with 7/28-day results, core testing, labs, the inspection firm, quality control, concealed works and signed evidence.
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4 modules
Health & safety
Safety officers and agreements, accident reports and the per-worker list of missing documents.
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9 modules
Reports & tools
Reports, the attendance report, a management panel for all sites, activity and equipment costs, reminders, meetings, calls and field reference.
Offline-first
Basements, tunnels, remote sites. The app keeps working.
Every record is saved on the phone first. Choose Offline mode and your records never leave the device — the app fetches its licence with an anonymous device ID. Choose Online mode and your records sync to StructurePrime Cloud — entries made without signal wait on the phone and go up when the connection is back.
Saved on the phone first
Records live in the app’s private storage on the device; a PIN keeps the app closed to others using the phone.
JSON backup and restore
Export all your records as one JSON file whenever you like, and restore them on another phone.
Sync that waits for signal
In online mode, changes go up a few seconds after you save and again whenever the connection returns. Photos can wait for Wi-Fi.
Roles on every device
In a team, each member sees only the areas and sites of their role; the server checks every request.
Online mode
Cloud sync with your StructurePrime account, so your records are on every phone you sign in on. With Premium: team members with roles, QR invites, unlimited devices and 90-day history.
Cloud sync · teams with PremiumChoose on first launch and change it any time in Settings. Switching to online keeps your records and uploads them.
Concrete sample
Signed · verified
C30/37 · 150×150
SHA-256
9f2c7a1e4b0d3f8a6c2e5b7d1a9f0c4e8b3d6a2f7c1e9b4d0a5f3c8e2b7d1a6f- Signature
- RSA-2048 · server key
- Server time
- 2026-10-14T06:42:18Z
- GPS accuracy
- ±6 m
Digital evidence
Records that are hard to argue with
Photos are saved with their GPS position and time. To sign a record, the app computes its SHA-256 fingerprint on the phone; only that fingerprint goes to the StructurePrime server, which signs it with its RSA-2048 key and the server time. The signature can be checked in the app later — even offline.
Fingerprinted on the phone
The SHA-256 hash is computed on the device. The photo itself is never sent for signing.
Located and timed
GPS position and time are part of the record; the server time is part of the signature.
Checked on the device
Verification uses the published public key and works without signal. Change one character and the check fails.
Locked once signed
A signed record can no longer be edited. Digital Evidence, Samples, Core Testing and Concealed Works Records can be signed.
Signing needs a signed-in account, online mode and Premium. No signal? The record waits as “awaiting signature” and is signed as soon as the app is online again.
How the Digital Evidence module worksWeb panel · coming soon
The office will see what the site records
A read-only web panel for the office is being built on the same cloud workspace: sample results, finance summaries, attendance and team roles in a desktop browser. It is not available yet — until it opens, everything runs in the app on phones and tablets.
How it works
From install to your first record in minutes
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1
Install and add your site
Start the 30-day free trial with your StructurePrime account, then add the site, its blocks and the crews working today. Moving to a new phone? Import your JSON backup.
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2
Record from the field
The + button opens quick entry from any screen: attendance, cash, concrete, production, samples and evidence — on the active site.
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3
Share reports, or the whole workspace
Export PDF and CSV reports with Premium, or switch to online mode and invite your team with a QR code.
In the field
Three mornings on a site
Typical days, told through the modules that handle them — not customer stories.
01
Site chief
Residential block · pour day
The first truck arrives at 07:40. Plate, m³, concrete class and slump go into Concrete Pours before it leaves. The cubes taken from the pour get a sample record with photos and GPS, and the 7- and 28-day results are added to the same sample when the lab reports them.
02
Owner
Small contractor · three sites
With the team in online mode (Premium), foremen log cash on site with a photo of the receipt, and the owner follows each site’s balance and this week’s cheques on their own phone. In the evening the Management Panel puts all three sites side by side.
03
Site engineer
Brick delivery · damaged pallets
Half a pallet of bricks arrives broken. The delivery goes into Goods Received and the photos into Digital Evidence, with GPS position and time; once signed, the record can no longer be edited. The claim to the supplier starts from a record, not from memory.
“Technology that doesn’t make the job easier is just one more thing to carry. We built StructurePrime from inside the job site, for the people who work on it.”
Security & data
Your data, your device, your rules
StructurePrime was built offline-first for a reason: the site owns its records. In online mode they sync to StructurePrime Cloud, scoped by role and site, and access can be taken back at any time.
Kept on the phone
Records live in the app’s private storage, protected by the operating system. A PIN keeps the app closed on a shared phone.
Fingerprints, not photos
For a digital signature only the SHA-256 fingerprint goes to the server. The photo stays with you.
Offline means offline
Offline mode does not send your records anywhere. The app has no advertising or analytics SDKs.
Nine roles, per site
Owner, project manager, accountant, site chief, foreman, timekeeper and more — each sees only its areas, and the server checks every request.
Portable backups
Export all your records as one JSON file at any time and restore them on another phone.
History and nightly backups
In online mode every change is kept with who made it and when — 14 days without Premium, 90 with Premium — and every workspace that changed is backed up each night, encrypted.
Who sees what in online mode
The timekeeper sees attendance, the foreman sees production and progress payments, the accountant sees the money. You decide who sees which sites, and you can take access back at any time. Team members with roles come with Premium.
| Site | Attendance | Production | Materials & store | Finance | Contracts & payments | Permits & documents | Inspection & quality | Health & safety | Meetings & calls | |
|---|---|---|---|---|---|---|---|---|---|---|
| Site admin | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Owner | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Project manager | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Accountant | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Site chief | Yes | Yes | Yes | Yes | No | No | Yes | Yes | Yes | Yes |
| Architect / engineer | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes |
| Storekeeper | Yes | Yes | Yes | Yes | No | No | Yes | Yes | Yes | Yes |
| Foreman | No | Yes | Yes | No | No | Yes | No | No | No | No |
| Timekeeper | No | Yes | No | No | No | No | No | No | No | No |
Why not paper or a chat group
What changes when the record is made where the work is
| Paper & spreadsheets | Chat groups | StructurePrime | |
|---|---|---|---|
| Who recorded it, when and where | Whoever wrote it, if they signed | Sender and time, no structure | Time and place on the record; the author in online mode |
| No signal on site | Paper works; shared files don’t | Messages wait to be sent | Works offline; syncs later in online mode |
| Photo kept with the record | In a separate folder | Lost in the scroll | Attached to the record, signable as evidence |
| Totals and balances | Added up by hand | Collected by someone later | Calculated as you record |
| 28-day result next to the pour | In the lab file | A photo of the lab sheet | On the same sample record |
| Who sees what | Whoever has the file | Everyone in the group | Nine roles, per site |
What’s new
What’s new in StructurePrime 1.0
The first release under the StructurePrime name (formerly SantiyePro), rebuilt around how a site works.
- New
Five tabs: Panel · Field · Quick entry · Finance · Menu. Cloud, backup, settings and license are under Menu.
- New
Choose how you work on first launch: Offline (this device only) or Online (cloud sync). Change it any time in Settings.
- New
Cloud sync with a StructurePrime account: sign in with Google, Apple, LinkedIn or a code sent by e-mail.
- New
Team workspaces: invite people with a QR code or a link and give each one of nine roles, per site (Premium).
- New
A Finance tab with the cash balance, net receivables and pending cheques, next to budget, cash flow, profitability and cost alerts.
- Improved
Digital signatures by the StructurePrime server (RSA-2048 and server time), checked on the phone even offline.
- Improved
Dark theme, right-to-left layouts and 22 languages.
Pricing
Try everything free for 30 days.
Start a 30-day free trial of Premium in the app: every module, unlimited sites and records. Google Play charges nothing during the trial; after it, Premium continues weekly, monthly or yearly in your local currency. Cancel any time.
Free trial
30 days free
Sign in with your StructurePrime account in the app and start the trial on Google Play. Cancel before day 30 and you pay nothing.
- Every module
- Unlimited sites and records
- PDF / CSV export
- Digital signature
- Team members with roles
- Works offline
Premium
After the trialLocal price
Weekly, monthly or yearly — shown in Google Play in your currency
- WeeklyTry it on a short job
- MonthlyFlexible, cancel any time
- Yearly RecommendedOne payment for the whole year
- Unlimited records
- Unlimited sites
- PDF / CSV export
- Digital signature
- Team members with roles
- Unlimited devices
- 90-day history and cloud restore
Premium belongs to your StructurePrime account: sign in in the app to start the trial or subscribe. Without a trial or subscription the app opens read-only. Managed in Google Play — cancel any time. It renews automatically at the end of each period.
Get it on Google PlayQuestions
Questions from site managers
Is there a free trial?
Yes. Premium starts with a 30-day free trial in the app: every module, unlimited sites and records — enough to run it on real work. Google Play charges nothing during the trial, and you can cancel before it ends. Without a trial or subscription the app opens read-only: you can look around and load the demo site, but not add or change records.
How much does Premium cost?
Premium is a Google Play subscription — weekly, monthly or yearly. Google Play shows the price in your local currency before you pay, and you can cancel any time in your Google Play settings. Premium belongs to your StructurePrime account, so you sign in before subscribing.
Does it work without internet?
Yes. In offline mode everything stays on the phone. The app connects to our server to get its licence — it sends an anonymous device ID, no personal information — and keeps the licence on the phone; while there is an internet connection it checks the licence about once a day. In online mode the app keeps working without signal: records are queued on the phone and sent when the connection comes back.
Where is my data stored?
In offline mode, only on your phone — you back it up with a JSON export. In online mode, on your phone and, synchronised, in StructurePrime Cloud, so your other phones — and, with Premium, your team — see the same records. You choose which kinds of data each device uploads.
Who owns the records?
You do. In offline mode they never leave your phone. In online mode we store them only to sync and back them up; we don’t sell data or show ads, and you can export everything as a JSON file at any time or delete your account in the app.
Can my whole team use it?
Yes — in online mode, with Premium. Invite people with a QR code or a link and give each one a role: site admin, owner, project manager, accountant, site chief, architect/engineer, storekeeper, foreman or timekeeper. Each role sees only its own areas, and you choose which sites they see.
How does digital evidence work?
Photos are saved with GPS location and time. The app computes a SHA-256 fingerprint of the record; only that fingerprint is sent to the StructurePrime server, which signs it with its RSA key and the server time. Signed records cannot be edited, and the signature can be checked on the device, even offline. Digital signatures are part of Premium.
Is there a web panel for the office?
Not yet. A read-only web panel on the same cloud workspace is being built. Until it opens, everything runs in the app on Android phones and tablets.
Which phones does it run on?
Android 8.0 or later, on phones and tablets. Install it from Google Play, or get the APK from our download page.
Which languages does the app support?
22 languages, from Turkish and English to Arabic, Chinese, Hindi and Hebrew. Each phone can use its own language.
Can I move my data to a new phone?
Offline: export a JSON backup on the old phone and import it on the new one. Online: sign in on the new phone and your sites sync down.
Not answered here? Open a support ticket
Your next pour, with proof.
Start with a 30-day free trial — Google Play charges nothing until it ends. In 22 languages, from English and Turkish to Arabic and Hindi.
