# V-Graph Save

> Scientific graphing calculator for solving, plotting, and unit conversions on iOS. (iPhone/iPad app by Staghorn Ridge LLC.)

- Source: https://appshunter.io/ios/app/v-graph-save/id1191884067 (this page in markdown: same URL + `.md`)
- Developer: [Staghorn Ridge LLC](https://appshunter.io/developer/1048815628)
- Category: Utilities, Productivity
- Price: $2.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.3 · 10 MB
- Languages: English
- Released: 2017-01-17
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/v-graph-save/id1191884067/reviews.md

## What is V?

V-Graph Save is a scientific graphing calculator for iPhone and iPad that is designed to solve real problems in engineering and science.

(V-Solve is a free app that has all of the features of V-Graph Save except for graphing and being able 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 and plots 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.
• Equations, 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 graphing, equation creation and saving to the library, and unit conversion examples.


Graphing

• Plots explicit and implicit equations.
• Up to 3 equations can be plotted simultaneously.
• Pinch and Pan capabilities.
• Linear, log, inverse, inverse for celsius, inverse for fahrenheit scales for both x and y axes.
• Cursor displays both the y-value and slope for each equation.
• Cursor can be controlled by a finger or by entering an exact x-value.
• Area under the curve and line segment length can be displayed for a specified x-value range for one equation.
• For two equations, the area between the curves and the line segment length for both curves are displayed.


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, plotted, and have unit conversions carried out on the dependent variable.
• Variable Mode allows equations with more complex variables to be created and saved to the equation library under user-defined categories.
•  Up to 3 equations from the library can be plotted simultaneously.
• Super- and sub-scripting 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 easily accessed.


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.


Equation and Constant Libraries

• Equation library with categories of Algebra, Geometry, Physical Properties (Vapor Pressure), Heat Transfer, Statistics, and Electricity.
• Physics constant library.
• New Equations and Constants can be saved to libraries under user-defined categories.
• Equation library has a summary page for each equation, which includes a display of the equation, its variables in table format, and a detailed description.


Other Features

• E-mail contact.
• Memory stack maintains values, variable symbols, and equation names of an unlimited number of previous 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.

## Key features

- Solves and plots explicit/implicit equations
- Natural textbook equation entry
- Extensive unit conversion library
- Save custom equations and constants
- Detailed graphing with pinch/pan
- Area under curve and line segment calculation

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/v-graph-save/id1191884067/reviews.md

### 5/5 — Super useful

*2017-03-17, version 1.0*

Love this app, Great to finally have so many options on my phone calculator!

## Frequently asked questions about V

### What is V-Graph Save?

V-Graph Save is a scientific graphing calculator for iPhone and iPad. It is designed to solve real problems in engineering and science, allowing users to enter and plot equations in their natural textbook form.

### What kind of equations can V-Graph Save plot?

V-Graph Save can plot both explicit and implicit equations. Up to three equations can be plotted simultaneously, with features like pinch and pan for navigation.

### Does V-Graph Save have unit conversions?

Yes, V-Graph Save includes a comprehensive unit conversion library with 59 categories. Unit conversions are made simultaneously and displayed in a table for all units within the same category.

### Can I save my own equations and units in V-Graph Save?

Absolutely. V-Graph Save allows you to save equations, constants, and user-defined unit conversions into libraries. You can also create new units and save them.

### What are the graphing capabilities of V-Graph Save?

V-Graph Save offers detailed graphing features, including the ability to calculate the area under the curve and line segment lengths for specified ranges. It also displays the y-value and slope at the cursor.

### How does V-Graph Save handle equation entry?

Equations are entered and displayed in their natural textbook form. V-Graph Save supports various functions like square root, logarithms, trigonometric functions, and hyperbolic functions.

### Is V-Graph Save available on Android devices?

Based on the provided information, V-Graph Save is designed for iPhone and iPad, indicating it is an iOS-exclusive application.

### How often is V-Graph Save updated?

The latest version, 1.4, was released on January 31, 2021. This suggests updates may not be very frequent, but the app has been stable since its initial release on January 17, 2017.

## Version history (last 1 release)

### 1.4 — 2021-01-31

- Fixed several bugs.
- Upgraded software to iOS 14.3.

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## More apps by Staghorn Ridge LLC

- [V-Calc Lite](https://appshunter.io/ios/app/v-calc-lite/id1097157966)
- [V-Solve](https://appshunter.io/ios/app/v-solve/id1200898200)

All apps by Staghorn Ridge LLC: https://appshunter.io/developer/1048815628

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*