Small tools for real work.
Official product information, support and privacy policies for independent apps developed by Peter Lan.
cad-viewer friendly
Open STEP, STP and STL engineering models on your phone, inspect basic dimensions, and navigate a clear 3D view. Full access adds orthographic views, distance and arc measurements, and PNG, DXF and vector PDF exports.
View
Import STEP, STP and STL files and use touch gestures to rotate, zoom, and move the model.
Measure
Full access includes distance and continuous-arc measurement in 3D and orthographic views.
Export
Full access can prepare PNG, 1:1 DXF and vector PDF files for the system share sheet.
Measurements and detected features are convenience references. Conversion, mesh approximation, and source-file design may introduce error. Always use the designer’s original dimensions as the authority.
Plans
The free version includes 3D import and basic dimensions. An annual auto-renewing subscription unlocks the full feature set. Eligible new subscribers may receive a 7-day free trial when shown by the Apple App Store or Google Play. The applicable store displays the price and eligibility before purchase.
cad-viewer friendly — Support
For technical help, purchase restoration, file compatibility questions, or development requests, email dpeter1314520@gmail.com.
Basic operation
- Open a STEP, STP or STL file from the app.
- Drag with one finger to rotate the model.
- Pinch with two fingers to zoom; drag with two fingers to move it.
- Use Reset to restore the default 3D and orthographic view positions.
- Use Restore Purchases in Settings if full access is missing after reinstalling or changing devices.
cad-viewer friendly — Privacy Policy
Effective date: August 26, 2026
Files and processing
CAD files selected in cad-viewer friendly are processed locally on the device and are not uploaded to developer-operated servers. Exported files leave the app only when the user selects a destination through the operating system share interface.
Accounts, analytics and tracking
The app does not require a developer-operated account, does not include developer-operated analytics or advertising, and does not track users across apps or websites.
Purchases
Subscriptions, trial eligibility, entitlement status, payment processing, and purchase restoration are handled by the Apple App Store or Google Play, depending on the user’s device. The developer does not receive or store full payment-card details.
Support email
Information voluntarily included in a support email is used to respond to that request and is processed by the relevant email service providers.
Contact
Privacy questions: dpeter1314520@gmail.com
cad-viewer friendly — Subscription Terms
Payment is charged through the Apple App Store or Google Play at purchase confirmation. The annual subscription renews automatically unless cancelled according to the applicable store’s terms. If the applicable store shows an eligible 7-day free trial, the subscription converts to a paid annual subscription unless cancelled before the trial ends. Subscription management and cancellation are available in the user’s Apple App Store or Google Play account settings.
More Friendly Apps
Future apps can be added to this same website while keeping separate support, privacy, and terms anchors for each App Store listing.