Solve f(x)

Quadratic, Cubic & Root Solver

Only for iPhone

Free · In‑App Purchases

iPhone

Every root, real and complex, in one tap. Quadratics, cubics, quartics and beyond instantly, offline, no account needed. Most calculator apps stop at quadratics. Solve f(x) doesn't. Solve f(x) solves polynomials of any degree, from simple linear equations up through degree 20, and finds every root, real and complex, instantly and entirely offline. No account, no internet connection, no data collected. Free: degrees 1–3, real roots, interactive graph, dark mode. PolySolve Pro ($5, one-time): degree 4 through 20, complex roots, multiplicity detection, higher precision, and solve history. FEATURES • Solve any polynomial, degree 1 through 20 • Every root: real and complex, with multiplicity detection (e.g. (x-2)² correctly shows a repeated root) • Exact symbolic answers for degree 1 and 2 when they simplify cleanly (e.g. x = (-1 + √5)/2), plus decimal values everywhere • Two ways to enter a polynomial: a simple coefficient list, or type it naturally like "3x^4 - 2x^2 + 7x - 1" • Interactive graph with pinch to zoom and pan, real roots marked directly on the curve • Solve history so you can revisit anything you've worked on • Adjustable precision 4, 8, or 12 decimal places • Full dark mode support Built for engineering and math students who hit a wall the moment a problem goes past a quadratic and for anyone who just wants correct answers fast, without ads or a subscription. Solve f(x) Pro is a one-time purchase that unlocks degree 4 and higher, complex roots, multiplicity detection, extended precision, and solve history. No subscriptions, ever.

Ratings & Reviews

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Improved App Store discoverability. Same fast, fully offline polynomial solving.

Version 1.0.1

The developer, Celmo Mosse, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

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    Information

    Seller
    • Celmo Mosse
    Size
    • 625.7 KB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Celmo Mosse
  • Developer Website
  • Privacy Policy