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Solve - Graphing Calculator
 This app is designed for both iPhone and iPad
  • Price
    $3.99
  • CategoryUtilities
  • First releasedDecember 11, 2008
  • Versions4 archived
  • Installable4 of 4
  • AvailabilityStill on the App Store
  • SellerPomegranate Software

RequirementsCompatible with iPhone, iPod touch, and iPad. Requires iOS 3.0 or later.

Customer Ratings

As of November 25, 2020
     
146 Ratings

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Solve is a calculator like no other! Solve solves expressions as you type and features an innovative memory system to store and recall answers. Simply touch the answer to store it and touch the stored answer to use it in an expression.

Solve has four tabs that select four different calculators each with its own color. Multiply numbers, calculate a tip and find a square root all without clearing your results!

Plot graphs with a single touch! Solve plots 2D and 3D functions using the x, y and θ variables. When you use the x, y and θ variables in an equation the answer will say Touch to Plot. Touch this label to graph the equation.

GRAPHING Plot functions using the x variable. For example, "y=sin(x)" is just entered as "sin(x)". • cos(x) • abs(x) • x^2+2x+6

POLAR GRAPHING Plot polar equations using the θ variable. For example, "r=2θ" is just entered as "2θ". • 2θ • sin(2θ)

3D GRAPHING Plot 3D functions by using the x and y variables. For example, "z=x+y" is just entered as "x+y". • cos(x)+sin(y) • x^2+y^2

PLOT MULTIPLE GRAPHS Graph multiple functions by separating each equation with a comma. • sin(x),cos(x) • x,x^2,x^3

TIME GRAPHING The T variable is used to create animated or time plots. • cos(x+T) • sin(x+T)*x • cos(x+T)+sin(y+T)

USER REVIEWS Really nice calculator by NeedHim "Having multiple calculators that you can use your calculations in is really a cool function. Prevents you from having to have a pad and paper to figure out multiple calculations. Also the colors are just incredible."

Simply amazing. by oddgoingson "I was blown away by this app. When I first tried it and the tutorial came up, my first instinct was to skip past it. Then I started... Blown away. This calculator has everything and more. It is so logical for those who always wondered why calculators are sometimes so archaic. Forget copy and paste. Then I got to the graphing.... A must have period!"

Perfect! by Michael "I've always hated how calculators didn't save answers. It made working out equations very hard and time consuming. But this app does that, and it does it well! Finally, a calculator app that actually works."

Outstanding calculator -- full featured! by ofloveandhate "I have been using Solve for a few years now. Prompt updates, excellent controls, and a ton of features make it the best calculator I have used. I love having four separate units which I can use in each other and the plotting is easy as pi."

Great app by biosci "It does everything I need in a 'fun' way that's intuitive to how I think and operate. I'll take it!"

Great Calculator by Carl E. M. "This is a great calculator, aesthetically and functionally. Having the answer appear as you enter numbers will be the future of all calculators."

I love this calculator by Alan63134 "I work on a shipping dock and it saves me a lot of time and headache. I can have 4 different calculator in one place. I can see the different weights or counts and know where I am if I have to do a lot of weighing or counting on different pallets. I use it every day. I also use it while shopping and can add the price of my shopping list and calculate what things cost. I love this calculator."

Awesome! by smart-music-fan "This app is great. It easily graphs functions on the xy plane, and adding T as a variable to make the graph move is so fun. Its 3D graphing capability is great - quick, easy (it sets nice bounds on the z axis so you can see things clearly), and helpful for visualizing my Multivariable Calculus homework."

Fantastic by xTricksterz "This app is beautiful, I use on my iPad and I'm first to answer most of the problems in class. This app shreds TI's calculator OS."

Awesome!!! by llikeadodachacha "Does just about everything my TI-84 Plus but quicker and much easier to manipulate the graphs. It loads instantly and the 3D function is awesome for higher level math classes (I'm in Calc 3 now and it's already come in hand!)

Sort by Date
Show everything
To install apps directly onto this device, it must be jailbroken with AppSync installed.
2.2.1
Requires iOS 3.0+
743 KB Install Download
2.3
Requires iOS 3.0+
643 KB Install Download
3.1
Requires iOS 3.2+
September 17, 2010
13.2 MB Install Download
4.5.2 (452)
Requires iOS 5.0+
Retina (iPhone only)
April 2, 2013
2.1 MB Install Download

Chart History

Top Free · Education View chart ›
Peaked at #5 (December 17, 2009) · 1 archived capture · Dec 2009

Ratings Over Time

sampled from 6 archived captures
DateVersionRatingRatingsPrice
February 16, 2010 2.1 — 468 $1.99
January 1, 2011 3.2 — 739 $3.99
January 13, 2012 — — 765 $3.99
March 25, 2013 — — 818 Free

From archived App Store listing data, captured by the Wayback Machine.

Archived Reviews

8 of 25
Really nice calculator
     
by NeedHim.org · May 20, 2016

Having multiple calculators that you can use your calculations in is really a cool function. Prevents you from having to have a pad and paper to figure out multiple calculations. Also the colors are just incredible.

Quite functional, but 100 + .1 should equal 100.1
     
by Wozzing · September 29, 2016

The good: Solve provides most of the functionality you would expect from a basic scientific/graphing calculator, with a simple UI that's pleasant to use. It's not the most powerful thing in the world, but it should be sufficient for mathematics at up to a high school-level. The bad: this calculator app uses raw floating point numbers for calculations rather than an arbitrary precision decimal library, with the result that 100 + .1 equals 100.099999999999994, among other errors. These small inaccuracies compound as you perform more and more operations, which is a problem in particular when calculating things involving dollars and cents. Using Solve involves a minor but nevertheless existent trade-off between convenience and accuracy, and whether it's still worth using depends on how acceptable this is to you.

Love it, but
     
by Angorn · March 10, 2026

I’ve used this calculator for years and I love it, but please update it for iOS 26, just make it easier to swipe in and out of like others have asked for, don’t worry about changing anything else! Do that and give me an option to tip. I would gladly pay for this app again after all these years!

No Ads - Side by Side Calcs
     
by BigEZ in TX · September 26, 2025

Simple, no nonsense calculation! Love it!

Annoying requires two swipes to exit
     
by Zac K. · October 30, 2025

This is my preferred calculator for iOS because it’s very convenient to have have multiple calculator pages with values that you can store and use later. Unfortunately it has a very frustrating quirk where you have to swipe up from the bottom of the screen twice to exit the app or switch between apps. This makes the app unusable when I need to do some quick calculations while switching back and forth from another app. The only other apps I have seen this happen with are games where you might accidentally swipe up near the bottom of the screen by accident, but I don’t think that is an issue for a calculator, so I’m not sure why it happens here.

Great!
     
by Satisfied app guy · September 5, 2015

Easy to use, great app!

Nice Calculator
     
by I pixel · February 12, 2016

This calculator works very well for typical calculations. It is very easy to use and has capabilities that range from basic calculations to using it as a graphing calculator.

👌🏻Great app
     
by Prop hunt😂 · September 30, 2015

This app is amazing its helps with my math problems and its just great!😀

Period reviews recovered from Apple's customer-review feeds via the Wayback Machine.

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