What's New

Bug fixes and interface improvements

App Description

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!)

iPhone Screenshots

(click to enlarge)

Solve - Graphing Calculator screenshot 1 Solve - Graphing Calculator screenshot 2 Solve - Graphing Calculator screenshot 3 Solve - Graphing Calculator screenshot 4 Solve - Graphing Calculator screenshot 5

iPad Screenshots

(click to enlarge)

Solve - Graphing Calculator screenshot 6 Solve - Graphing Calculator screenshot 7 Solve - Graphing Calculator screenshot 8 Solve - Graphing Calculator screenshot 9 Solve - Graphing Calculator screenshot 10

App Changes

  • June 09, 2012 New version 4.0
  • June 09, 2012 Price decrease: $3.99 -> $0.99
  • June 15, 2012 Price increase: $0.99 -> $2.99
  • June 28, 2012 New version 4.1
  • July 31, 2012 New version 4.1.1
  • September 25, 2012 New version 4.2
  • October 23, 2012 New version 4.3
  • November 25, 2012 Price increase: $2.99 -> $5.99
  • December 17, 2012 Price decrease: $5.99 -> $3.99
  • March 21, 2013 New version 4.5
  • March 21, 2013 Price decrease: $3.99 -> FREE!
  • March 26, 2013 New version 4.5.1
  • April 03, 2013 New version 4.5.2
  • June 15, 2013 Price increase: FREE! -> $1.99
  • July 12, 2013 Price decrease: $1.99 -> FREE!
  • September 18, 2013 New version 4.6
  • September 18, 2013 Price increase: FREE! -> $6.99
  • October 04, 2013 Price decrease: $6.99 -> $3.99
  • October 07, 2013 Price increase: $3.99 -> $6.99
  • November 02, 2013 Price decrease: $6.99 -> $2.99
  • October 21, 2014 New version 5.0
  • November 09, 2014 New version 5.0.1
  • November 09, 2014 Price decrease: $2.99 -> $0.99
  • February 12, 2015 Price increase: $0.99 -> $4.99
  • February 13, 2015 Price decrease: $4.99 -> $2.99
  • February 19, 2015 Price decrease: $2.99 -> $0.99
  • March 08, 2015 Price increase: $0.99 -> $1.99
  • April 15, 2015 New version 5.1
  • April 15, 2015 Price decrease: $1.99 -> FREE!
  • April 27, 2015 New version 5.1.1
  • May 01, 2015 Price increase: FREE! -> $0.99
  • May 28, 2015 New version 5.1.2
  • May 28, 2015 Price decrease: $0.99 -> FREE!
  • May 31, 2015 Price increase: FREE! -> $0.99
  • June 10, 2015 Price decrease: $0.99 -> FREE!
  • July 11, 2015 Price increase: FREE! -> $1.99
  • July 31, 2015 Price decrease: $1.99 -> FREE!
  • October 04, 2015 Price increase: FREE! -> $1.99
  • November 24, 2015 Price decrease: $1.99 -> FREE!
  • November 29, 2015 Price increase: FREE! -> $1.99
  • December 31, 2015 Price increase: $1.99 -> $4.99
  • February 06, 2016 Price decrease: $4.99 -> $1.99
  • February 08, 2016 Price increase: $1.99 -> $4.99
  • February 28, 2016 Price decrease: $4.99 -> $1.99
  • August 14, 2016 Price decrease: $1.99 -> FREE!
  • November 07, 2016 Price increase: FREE! -> $1.99
  • December 15, 2016 Price decrease: $1.99 -> FREE!
  • December 22, 2016 Price increase: FREE! -> $1.99
  • June 14, 2019 New version 5.2.1
  • June 14, 2019 Price increase: $1.99 -> $2.99
  • June 16, 2019 Price increase: $1.99 -> $2.99
  • July 15, 2020 New version 5.3.2
  • July 15, 2020 Price increase: $2.99 -> $3.99
  • September 16, 2023 Price decrease: $3.99 -> $1.99