# Solve - Graphing Calculator — A colorful graphing calculator

> A colorful graphing calculator that solves expressions and plots functions. (iPhone/iPad app by Pomegranate Apps LLC.)

- Source: https://appshunter.io/ios/app/solve-graphing-calculator/id299460923 (this page in markdown: same URL + `.md`)
- Developer: [Pomegranate Apps LLC](https://appshunter.io/developer/293619496)
- Category: Utilities, Education
- Price: $1.99
- Rating: 4.70/5 from 198 App Store ratings · 171 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 5 MB
- Languages: American English
- Released: 2008-12-11
- Data updated: 2026-08-20
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/solve-graphing-calculator/id299460923/reviews.md

## What is Solve?

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!)

## Key features

- Solves expressions as you type
- Innovative memory system
- Four distinct calculator tabs
- 2D and 3D function plotting
- Polar and time graphing
- Plot multiple functions simultaneously

## What do users think of Solve?

Overall sentiment: positive

**Pros**

- 👍 Intuitive and user-friendly interface
- 💡 Multiple calculator pages for simultaneous calculations
- 📊 Powerful graphing capabilities (2D, 3D, time-based)
- 🎨 Visually appealing design with color options
- ⚡ Fast and responsive performance
- 🧮 Comprehensive scientific calculator functions
- 💾 Ability to store and reuse calculations
- 📱 Simple, clean layout without clutter
- 🎓 Excellent tutorials for learning features
- 📦 Small file size

**Cons**

- 🐛 Gesture conflict with iOS swipe-to-exit (requires two swipes)
- 🐛 Home indicator hidden, complicating app exit
- 🔢 Floating-point precision errors (100 + 0.1 ≠ 100.1)
- ⚠️ Lacks percent button functionality
- ⚠️ Missing some advanced functions (floor, ceil, derivatives, integrals)
- ⚠️ Graph axis scaling limitations (Y-axis ignored)
- ⚠️ No independent X/Y axis scaling
- ⚠️ Limited calculation history per page
- ⚠️ Trigonometric functions displayed redundantly
- ⚠️ Outdated UI for modern iOS gestures

**Commonly reported bugs**

- Swipe up from bottom requires two swipes to exit app or switch apps
- Home indicator hidden causes navigation issues
- Floating-point arithmetic errors in decimal calculations
- Inverse trigonometric functions (cos⁻¹, sin⁻¹) calculate in reverse
- Graph plotting errors (e.g., sqrt(5²-x²) shows incomplete circle)
- Y-axis scale settings ignored in graphs
- Page swiping interferes with app-switching gestures
- Occasional decimal accuracy issues with multiple operations
- Graph of sin(x)e(-x) doesn't reach zero as expected

**Most requested features**

- Fix swipe-to-exit gesture conflict with iOS
- Add percent button for quick percentage calculations
- Implement undo/redo functionality
- Add calculation history storage and management
- Support for independent X/Y axis scaling
- Include derivative and integral calculations
- Add more color/theme customization options
- Implement trace feature for graphs with intersection detection
- Support for polar coordinate 'r' variable
- Add floor and ceil functions to UI
- Tip/donation option for users
- Larger buttons for easier use
- Ability to interact with graphs (trace, zoom)
- Support for cubed roots and other root functions
- Spanish language localization
- Gradient function for calculus

## Recent user reviews (10 of 171)

All indexed reviews: https://appshunter.io/ios/app/solve-graphing-calculator/id299460923/reviews.md

### 5/5 — Love it, but

*2026-03-10*

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!

### 2/5 — Annoying requires two swipes to exit

*2025-10-30*

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.

### 5/5 — No Ads - Side by Side Calcs

*2025-09-26, version 5.4*

Simple, no nonsense calculation! Love it!

### 4/5 — Almost perfect

*2025-06-13*

my only gripe is that it hides the home indicator, which makes leaving the app two swipes instead of one. Please set prefersHomeIndicatorAutoHidden to false

### 5/5 — It’s like a Christmas gift

*2025-01-22*

I’m so glad that the dev updated the app and get it back to the App Store. I never expected that they ever update the app again. Moreover, they finally fixed the annoying glitch when page switch while swiping to another app. The best calculator ever. Thanks and keep it up. Don’t abandon the app again 👆🤝

### 5/5 — So glad your app is back in Au!!

*2025-01-22*

I love this calculator soo much, and was so disappointed when I couldn’t get it on my new device…till now! 
This is the easiest and most functional graphing calculator I’ve used. 
Thank you for this wonderful app.

### 1/5 — Mac doesn't accept keyboard

*2024-04-13*

Please make the keyboard available

### 4/5 — 現iOSだと操作が……

*2024-03-01*

とても高機能かつシンプルで使いやすい！

だけど画面下部をタップするとページが左右移動するので、現iOSのホーム画面操作と同時に誤操作してしまうのが玉に瑕。

### 5/5 — Excelente, mas...

*2023-12-28*

O app é o melhor da categoria, mas precisa de atualização para os layouts mais novos dos iPhones.

### 5/5 — 太好用了！

*2023-12-21*

不仅可以保留4次计算，并且还能写很长的算式。还可以来回切换对比结果。很方便！
画二维、三维图也是很有意思！

## Frequently asked questions about Solve

### What does the Solve graphing calculator do?

This app functions as a versatile graphing calculator. It solves mathematical expressions in real-time as you type them and includes a unique memory system for storing and recalling answers. It also allows for the plotting of various types of graphs, including 2D, 3D, polar, and time-based functions.

### What are the key graphing features?

The app supports plotting 2D functions using the 'x' variable, polar equations with the 'θ' variable, and 3D functions with 'x' and 'y' variables. You can also plot multiple functions by separating them with commas and create animated or time plots using the 'T' variable.

### Is this app free to use?

Yes, the application is available for free. There are no in-app purchases or advertisements mentioned, making it a completely free tool for users.

### How does the memory system work?

The calculator features an innovative memory system. When you get an answer, you can simply touch it to store it. Later, you can touch a stored answer to easily use it within a new expression, streamlining complex calculations.

### What are the benefits of the multiple calculator tabs?

The app provides four distinct calculator tabs, each with its own color. This allows you to perform different types of calculations, such as multiplication, tip calculation, or finding square roots, without clearing previous results. You can also use results from one calculator tab in another, enhancing workflow.

## Version history (last 5 releases)

### 5.4 — 2025-01-21

Compatible with iOS 18.

### 5.3.2 — 2020-04-27

Bug fixes and interface improvements

### 5.3.1 — 2020-04-12

Bug fixes and interface improvements

### 5.3 — 2020-04-08

Interface Improvements

### 5.2.1 — 2018-06-03

Minor Update

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All apps by Pomegranate Apps LLC: https://appshunter.io/developer/293619496

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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 2026-08-20.*