AngleRight vs Sheet Scan

AngleRight solves triangles and parallelograms and draws them to scale as you type. Enter what you know and every side, angle, height and area appears instantly, with clear step-by-step working. RIGHT TRIANGLES • Right angle at B: solve from two legs, a leg and the hypotenuse, a leg and an angle, the hypotenuse and an angle, or the area and a leg • Pythagoras, sine, cosine and tangent shown step by step ANY TRIANGLE • SSS, SAS, ASA, AAS and SSA • The ambiguous SSA case shows both possible triangles, or explains why none exists • Area, perimeter, heights, medians, inradius and circumradius • Tells you whether a triangle is acute, right or obtuse, and scalene, isosceles or equilateral PARALLELOGRAMS • Solve from two sides and an angle, two sides and the height, two sides and a diagonal, the base with height and angle, or both diagonals • Height, diagonals, area and perimeter, and whether it is a square, rectangle or rhombus PROTRACTOR AND TILT LEVEL • Drag two arms to measure any angle, with supplement and reflex angles • Tilt level: lay your iPhone on a surface or hold its edge against a slope DRAW • Drag the corners of a triangle or four-sided shape on a grid and watch the measurements update live • Snap to grid, and one tap to make a right angle, a parallelogram or a rectangle DESIGNED FOR iPHONE AND iPAD • Four themes — Pearl, Midnight, Royal Gold and Sand — plus Auto for Light and Dark Mode • Landscape layout with the drawing beside the controls • Degrees or radians, 0 to 4 decimal places • Optional inscribed and circumscribed circles and heights on the drawings • Share your results as text • A formula guide covering Pythagoras, SOH CAH TOA, the sine and cosine rules, area and more PRIVATE BY DESIGN No account, no ads, no tracking and no internet connection needed. Everything stays on your device.

Hi, I’m Asher Zaczepinski, and I built Sheet Scan to make practicing music faster, easier, and way less frustrating. When I started learning clarinet, I was always looking for tools that actually helped me improve. Most apps were either too basic or too bloated—so I decided to build something better. Sheet Scan is an all-in-one app that helps student musicians scan their music and practice smarter. • Music Scanner + Recordings Take a photo of your sheet music and instantly get matched with full professional recordings from YouTube—filtered by your instrument and the exact piece you're playing. • Visual Metronome with Subdivisions Follow every beat and subdivision clearly with a visual metronome that helps you stay locked in. • Tuner with Instrument-Specific Tips Get real-time pitch detection, plus tuning advice tailored to your instrument—so you're not just told you're out of tune, you're told what to do about it. • Scales with Fingerings Access clean, accurate scales for your instrument, with sharps, flats, and fingerings already filled in—no more guesswork. Whether you’re prepping for band class, auditions, or just practicing on your own, Sheet Scan gives you the tools to actually improve—quickly, clearly, and in one place.