# V-Solve > Equation solver with natural display, unit conversions, and constant libraries. (iPhone/iPad app by Staghorn Ridge LLC.) - Source: https://appshunter.io/ios/app/v-solve/id1200898200 (this page in markdown: same URL + `.md`) - Developer: [Staghorn Ridge LLC](https://appshunter.io/developer/1048815628) - Category: Utilities, Productivity - Price: Free - Rating: 5.00/5 from 2 App Store ratings · 13 written reviews indexed - Age rating: 4+ - Requires: iOS 14.4 · 10 MB - Languages: English - Released: 2017-02-02 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/v-solve/id1200898200/reviews.md ## What is V? V-Solve has all of the features of V-Graph Save, except for graphing and the ability to save equations to the library. V-Solve has a demo feature which shows the graphing features of V-Graph Save for a select set of equations. Overview of Features • Solves explicit and implicit equations. • Equations are entered and displayed in their natural form, as they would appear in a textbook. • 59 categories of units in library, divided into english, metric, and SI systems. • Constants and user-defined unit conversions can be saved into libraries. • Well-organized Main, Trigonometric, English, and Greek keypads. • Help screen overlay provides pop-up description of the function of key buttons. • Tutorials provide demonstration of the calculator’s capabilities by programmatically stepping through equation creation and unit conversion examples. Equation Creation and Display • Equations are created and displayed in their natural form, as they would appear in a textbook. • Number Mode allows equations based on y (dependent variable) and x (independent variable) to be quickly created, solved, and have unit conversions carried out on the dependent variable. • Variable Mode allows equations with more complex variables to be created: • Unit conversions can be carried out on result. • Super- and subscripting of variables. • Functions include square root, squared, x to any power, log, ln, 10 to any power, e to any power, factorial, trigonometric (including inverse), hyperbolic (including inverse). • Button selector allows the variable symbol or its value to be displayed in the equation. • Previously used equations are maintained in memory and can be re-accessed by means of a drop-down selection window. Unit Conversions • Unit conversions are made simultaneously, and are displayed as a table of all units of the same category. • New units can be created and saved to the library, using the base units (m, s, g, ft, lb, etc). • New units are easily created using picker dials for the metric prefix (k, M, G, etc), base units, and power of 1, 2, 3, etc. Constant Libraries • Physics constant library. Constants can be saved to libraries under user-defined categories. Other Features • E-mail contact is accessed through a button provided in the Help/Tutorial screens. • Memory stack maintains values, variable symbols, and equation names of an unlimited number of previous calculations, which can be easily accessed for future calculations. • Multiple answers for implicit equations are saved to the memory stack. • Period or comma can be used as decimal separator. • Degrees or radians for trigonometric functions. • Decimal or Scientific Notation, and number of significant digits can be easily specified. Convergence criteria and maximum number of iterations can be specified for implicit equations. • No advertisements ## Key features - Solves explicit and implicit equations - Natural textbook-like equation display - Extensive unit conversions - Saveable constant libraries - Memory stack for past equations - Help screen and tutorials ## Recent user reviews (10 of 13) All indexed reviews: https://appshunter.io/ios/app/v-solve/id1200898200/reviews.md ### 5/5 — Good app *2018-07-04, version 1.2* Works great! ### 5/5 — Extremely powerful *2017-06-03, version 1.2* Impressive amount of features and options to perform any sort of engineering calculations. ### 5/5 — Great app! *2017-03-30, version 1.1* I downloaded this app for my mother-in-law who teaches Calculus! Fantastic job and so easy to use! ### 5/5 — Helpful *2017-03-28, version 1.1* V solve app is one of best, i like it, good job, will recommend to all my friends 👍 ### 5/5 — Must have *2017-03-27, version 1.1* Soon after it’s first use, the app has become a must have in my phone. Thanks developer! ### 5/5 — Amazing *2017-03-20, version 1.0* This app is wonderful. It literally saved my life in college. It resolves the craziest equations and you just have to write down the variables. I totally recommend it ### 4/5 — Great app! *2017-03-10, version 1.0* It is easier to use than other calculations and easy to use at a glance. But I want the color and interface design to be simple. ### 5/5 — Excellent *2017-03-07, version 1.0* Excellent, You must give it a try. ### 5/5 — Awesome *2017-03-07, version 1.0* Great app! ### 5/5 — Powerful! *2017-03-03, version 1.0* Professionally made app, easy to understand and use. I've been waiting for something like this app. Incredibly useful and well-designed app with great UI/UX! Thanks:) ## Frequently asked questions about V ### What types of equations can V-Solve solve? V-Solve can solve both explicit and implicit equations. Equations are entered and displayed in their natural, textbook-like form, making them easy to read and understand. ### Does V-Solve support unit conversions? Yes, V-Solve offers extensive unit conversions across 59 categories, divided into English, Metric, and SI systems. New units can be created and saved to a library. ### Can I save my custom constants and units in V-Solve? Absolutely. V-Solve allows you to save constants and user-defined unit conversions into libraries for easy access and reuse in future calculations. ### How does V-Solve handle previously used equations? V-Solve maintains a memory stack of previously used equations, which can be quickly re-accessed through a drop-down selection window. This includes multiple answers for implicit equations. ### Is V-Solve available on different devices? V-Solve is available for iPhone and iPad devices. It is designed to be compatible with iOS operating systems. ### How frequently is V-Solve updated? The latest version of V-Solve is 1.4, which was last updated on February 15, 2021. This indicates a moderate update frequency. ### What is the age rating for V-Solve? V-Solve has an age rating of 4+, making it suitable for a wide range of users, including younger students. ### Does V-Solve have ads? No, V-Solve is advertised as having no advertisements, providing an uninterrupted user experience. ## Version history (last 1 release) ### 1.4 — 2021-02-15 Bug fixes. 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User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*