Not worth the money
Works fine but is not worth $1.99. No options and very limited. I highly recommend using FSWizard. It is a free machining tool with a full triangle calculator, fillet calculator and more.
$3.99
About
This app instantly solves all types of tangent line problems for circles with interactive graphs and step-by-step solutions. It supports various calculation modes, coordinate systems, and is built for accuracy, making it ideal for students and professionals.
✓Three powerful calculation modes
✓Live interactive graph visualization
✓Full step-by-step solutions
✓Cartesian & Polar coordinate support
✓High precision calculations
✓Slope-intercept and general form equations
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What's New in Tangent Lines to Circles Calc
1.5
March 12, 2026
- Features and UI updates.
User reviews
Developer apps
FAQ
What types of tangent line problems can TangentCalc solve?
TangentCalc can solve external point tangents, tangent lines by slope, and tangent at a point on the circle. It provides instant computation of tangent points, line equations, and distances.
Does TangentCalc offer step-by-step solutions?
Yes, TangentCalc provides full, collapsible step-by-step solutions for every calculation, explaining distance formulas, tangent length derivation, and line equation construction.
Can I use TangentCalc with different coordinate systems?
Yes, TangentCalc supports both Cartesian (x, y) and Polar (r, θ) coordinate input, and allows toggling between Degrees and Radians for angular values.
How accurate are the calculations in TangentCalc?
All results are computed to 6 decimal places of precision. Equations are displayed in both slope-intercept form (y = mx + b) and general form (ax + by + c = 0).
Is TangentCalc suitable for learning geometry?
Yes, the app is designed for students and includes clear step-by-step solutions to help users understand how results are reached, not just to copy answers.
What devices is TangentCalc available on?
TangentCalc is designed for iOS and works on both iPhone and iPad devices.
Does TangentCalc have ads?
No, TangentCalc is ad-free. The app offers one download with full access and no advertisements.
What is the price of TangentCalc?
TangentCalc is a paid app priced at $3.99. It offers full access upon a single download with no subscriptions or in-app purchases.
