ArchMM vs Scale Ruler

Architectural scale, without the guesswork. ArchMM is a focused iPhone utility for scenic designers, model makers, architects, students, and anyone moving between real-world dimensions and physical scale models. Choose a conversion direction, enter the measurement you already know, select the drawing scale, and get a result ready to use in your drafting, model-making, or 3D-printing workflow. FEATURES • Convert full-size feet and inches to model millimeters • Reverse model millimeters to full-size feet and inches • Work at 1:1 or use standard architectural scales from 1″ through 1/16″ • Compare converted lengths with common 3D-printer bed dimensions • Copy results with one tap • Keep your selected scale and printer ready for the next calculation • Work offline with no account, advertising, analytics, or tracking ArchMM keeps the calculation close, clear, and out of the way—so you can return to the drawing, model, or printer setup in front of you.

Scale Ruler brings a realistic triangular scale to your iPhone, designed for drafting, measuring, studying, and everyday reference. Explore multiple scale standards with a smooth, swipeable ruler interface that recreates the familiar look and feel of a physical triangular scale. KEY FEATURES • Realistic Triangular Scale
View all three scale faces and swipe smoothly through detailed graduations. • Multiple Scale Standards
Choose from commonly used standards for China, Japan, the United States, the United Kingdom, Germany, and more. • Custom Scale Ratios
Create your own scale setup by adjusting ratios and graduations for individual ruler faces. • Labels & Markers
Add custom labels and markers directly to the ruler for scale notes, project names, dates, and other references. • Automatic & Manual Calibration
The app can calibrate based on your device display, with manual fine-tuning available using a physical ruler when greater precision is required. • Night Mode
Use a darker interface for more comfortable viewing in low-light environments. Whether you're an architect, designer, engineer, student, model maker, or simply need a convenient scale reference, Scale Ruler puts a versatile triangular scale right on your iPhone. Some advanced customization features may require an in-app purchase.