Secure download · Straight from the developer

Download StructurePrime now

Built on 35 years of hands-on site experience and trusted by thousands of engineers and field teams. One APK, zero dependencies — download it, install it, and put it to work on site.

StructurePrime v1.0.0

LATEST VERSION

Release date

2026-10-27

Min. Android

8.0+

Platform

Android

Your details are only used to log the download. We never share them with third parties.

How do I install it? Step-by-step guide

Virus & malware free

RSA digitally signed

SHA-256 verified

No internet required

Why we ship the APK directly

Distributing the app ourselves is a deliberate engineering decision.

Fixes at site speed

Feedback from thousands of engineers reaches the app the same day. Store review queues can hold back critical field updates for days — with direct distribution, the update is in your hands within hours.

Full data sovereignty

Shipping the APK directly lets us guarantee 100% that the app contains no trackers, analytics code or third-party SDKs. Your data stays on your device and is never sent to any server.

An industry standard

With 46 modules, StructurePrime has become a standard tool on site. Built on the principle of maximum efficiency from minimum data entry, it is part of the daily workflow of construction professionals.

The lifetime license advantage

No subscriptions. A single one-time payment gets you every module and all future updates for life. The 30% store commission we don't pay is passed on to you as a lower price.

35+

Years of field experience

5000+

Active users

Professional modules

100%

Works offline

Security & verification

Use the details below to verify the integrity and origin of the APK file.

RSA digital signature

Every APK is signed with StructurePrime's private RSA key. Android verifies this signature automatically during installation and blocks any file that has been tampered with.

SHA-256 hash check

Compare the hash of the file you downloaded with the reference value below to confirm its integrity. Change a single byte and the hash comes out completely different.

Zero data collection

StructurePrime sends no data to any server. It contains no analytics, ad SDKs or third-party tracking code. All your data is stored encrypted in your device's local storage.

Package name

com.structureprime.appcopy

Installation guide

Installing the APK takes less than 2 minutes. Just follow the steps.

Download the APK file

Tap the "Download APK" button above. The file will be saved to your phone's Downloads folder.

Allow installs from unknown sources

Open your phone settings: Settings → Security → Unknown sources (or simply tap the download notification and Android will ask you). Enable this permission for your browser.

You only need this setting for the first install

Open the APK and install

Tap the downloaded StructurePrime .apk file. Android's installer will open. Tap "Install" and wait for it to finish.

Open the app and get started

When installation completes, tap "Open". StructurePrime is ready — start using it right away, no internet connection needed.

Don't forget to set a PIN the first time you open it

Frequently asked questions

Is the APK safe? Does it contain viruses?

Absolutely safe. Every release is signed with an RSA digital signature before it is published. You can verify the file yourself by comparing its SHA-256 hash with the reference value on this page. The app contains no ad SDKs, analytics or third-party tracking code.

Why distribute directly instead of through an app store?

StructurePrime works fully offline and collects no data. Direct distribution guarantees there are no trackers or analytics in the app. It also lets us ship critical fixes from the field the same day, without waiting for review queues — a big advantage for our users.

How do updates work?

When a new version is released you get an in-app notification. Download the latest APK from this page and install it over your current version. Your data is kept, nothing is reset, and your license carries over as is.

Is the "unknown source" warning dangerous?

No. Android shows this warning for every app installed from outside an app store. It is a safety measure, not a sign that the app is harmful. You only need to grant the permission to your browser.

Will updating delete my existing data?

No. Installing an update over the existing app keeps your data, settings and license. Data is only reset if you fully uninstall and reinstall the app. An automatic backup is taken before each update.

Can I try it for free?

Yes! The free plan of StructurePrime gives you access to all 46 modules. Test the app fully with a limit of 50 records per site. When you're happy with it, switch to a lifetime license with a single payment.

Which Android versions are supported?

It runs on every Android device with Android 8.0 (Oreo) or later, tablets included. No special hardware is required.