TrueScale Support

Getting Started

How to Calibrate a Photo

  1. Capture or Select - Take a new photo or choose one from your library

  2. Place Two Points - Tap on two points of a known distance in your photo (like the edges of a coin or credit card)

  3. Set the Distance - Enter the real-world distance between those points, or select a reference object

  4. Export - Save your calibrated image at 300 DPI for accurate printing

Reference Objects

TrueScale includes built-in measurements for common reference objects:

  • US Quarter - 24.26mm diameter

  • Credit Card - 85.60mm long edge

Place your reference object in the photo, mark its edges, and TrueScale calculates the scale automatically.

Tips for Best Results

Taking Photos

  • Photograph straight down (perpendicular to the surface)

  • Avoid angles that create perspective distortion

  • Ensure good, even lighting

  • Include a reference object of known size

Placing Calibration Points

  • Zoom in for precise point placement

  • Touch and hold a point to drag it for fine adjustments

  • Use two fingers to pan when zoomed in

  • Double-tap to toggle zoom

Printing

  • Print at 100% scale (no "fit to page")

  • Use 300 DPI print settings

  • Verify with a ruler on your first print

Frequently Asked Questions

Does TrueScale upload my photos?

No. All processing happens on your device. Your photos never leave your phone.

What DPI does TrueScale use?

TrueScale resamples images to 300 DPI, which is the standard for high-quality printing.

Why is my exported image larger/smaller than the original?

TrueScale adjusts the pixel dimensions so that when printed at 300 DPI, the image matches real-world size. If your original photo had lower resolution, the file may be larger.

Can I use any object as a reference?

Yes! Use "Manual Entry" to enter any known distance. Just measure two points in your photo with a ruler and enter that measurement.

What units are supported?

TrueScale supports both inches and centimeters. Change your preference in Settings.

The print size seems wrong. What should I check?

  1. Ensure you photographed straight down, not at an angle

  2. Verify your reference measurement is correct

  3. Make sure you're printing at 100% scale, not "fit to page"

  4. Check that your printer is set to 300 DPI

Contact

Having trouble or have a suggestion? Reach out:

Email: david@allentattoo.com
Website: allentattoo.com

TrueScale by David Allen — For Artists and Designers

PRIVACY POLICY

TrueScale turns photos into accurately scaled design references.

By measuring a real-world distance inside an image, the app recalculates the photo to true physical size. You can then import it into Photoshop or Procreate and design with confidence, knowing your work matches real-world proportions.

TrueScale is designed with your privacy as a top priority. We do not collect, store, transmit, or share any of your personal data or photos.

Data Collection

We collect nothing. TrueScale does not:

  • Collect personal information

  • Upload your photos to any server

  • Track your usage or behavior

  • Use analytics or tracking tools

  • Share data with third parties

  • Require account creation or login

Photo Processing

All photo calibration and processing happens entirely on your device. Your images never leave your phone. When you export a calibrated image, it is saved directly to your device's photo library.

Camera and Photo Library Access

TrueScale requests access to your camera and photo library solely to enable the app's core functionality:

  • Camera: To capture photos for calibration

  • Photo Library: To select existing photos and save exported images

These permissions are used only when you initiate these actions. We cannot and do not access your photos in the background.

Third-Party Services

TrueScale does not integrate with any third-party analytics, advertising, or data collection services.

Children's Privacy

TrueScale does not collect data from anyone, including children under 13.

Changes to This Policy

If we update this policy, we will post the new version here with an updated date.

Contact

If you have questions about this Privacy Policy, please contact:

david@allentattoo.com

TERMS of SERVICE

Agreement to Terms

By downloading, installing, or using TrueScale ("the App"), you agree to these Terms of Service. If you do not agree, please do not use the App.

Description of Service

TrueScale is a photo calibration tool that allows you to resample images to true physical scale at 300 DPI for accurate printing. The App processes photos entirely on your device.

License

We grant you a limited, non-exclusive, non-transferable, revocable license to use TrueScale for personal or commercial purposes in accordance with these Terms.

Acceptable Use

You agree to use TrueScale only for lawful purposes. You may not:

  • Reverse engineer, decompile, or disassemble the App

  • Modify or create derivative works based on the App

  • Remove any copyright or proprietary notices from the App

  • Use the App in any way that violates applicable laws

Intellectual Property

TrueScale, including its design, features, and content, is owned by David Allen and protected by intellectual property laws. All rights not expressly granted are reserved.

Disclaimer of Warranties

TrueScale is provided "as is" and "as available" without warranties of any kind, either express or implied. We do not guarantee that:

  • The App will meet your specific requirements

  • The App will be uninterrupted, timely, or error-free

  • Calibration results will be perfectly accurate for all use cases

  • Exported images will print exactly as expected on all printers

You are responsible for verifying calibration accuracy for your specific needs.

Limitation of Liability

To the maximum extent permitted by law, David Allen shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising from your use of TrueScale, including but not limited to:

  • Inaccurate prints or calibrations

  • Loss of data or images

  • Any damages resulting from your reliance on the App

Indemnification

You agree to indemnify and hold harmless David Allen from any claims, damages, or expenses arising from your use of the App or violation of these Terms.

Changes to Terms

We may update these Terms at any time. Continued use of the App after changes constitutes acceptance of the new Terms.

Termination

We reserve the right to terminate or suspend your access to TrueScale at any time, without notice, for conduct that we believe violates these Terms or is harmful to other users or us.

Governing Law

These Terms shall be governed by the laws of the United States, without regard to conflict of law principles.

Contact

For questions about these Terms, please contact:

david@allentattoo.com