Solve vs Classicalc calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solve
This app offers a powerful graphing calculator with multiple functions. It solves expressions as you type and features an innovative memory system to store and recall answers. Easily plot 2D, 3D, polar, and time-based graphs with intuitive controls.
- 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
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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!)
Classicalc calculator
This calculator app offers instant calculations as you type, following the mathematical order of operations. It features unique piano sound themes and allows seamless continuation of calculations across iPhone and Apple Watch. Your equations are automatically saved for convenience.
- Instant calculation as you type
- Mathematical order of operators
- Cross-device continuity (iPhone/Watch)
- Automatic equation saving
- 14 piano sound themes
- Copy result to clipboard
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Classicalc is a unique, the most classy calculator app on the App Store. It's designed to be beautiful and simple, but also… to sound amazing! Each color theme has its own, actual Grand Piano major scale! It's Chopin-awesome! Underneath it beautiful simplicity, there's some serious technology powering Classicalc: ## Instant Calculation calculates the formula as you type, so you never have to use the equals sign (=). We spare you one unnecessary tap at a time. ## Classicalc calculates result using mathematical order of operators (× ÷ + -) so if you would like to add 1 to 1 and then multiply the result by 2, you should write (1 + 1) × 2 instead of 1 + 1 × 2 ## You can start your calculations on your iPhone, then Continue on your Apple Watch, and the other way around. ## Your most recent equation is always saved, even if you shut the app. When you run it again, The formula is instantly there. ## 14 great-looking backgrounds with related actual Grand Piano major scales. Change colors and major scales on iPhone app (by pressing little diamond in top-left corner) to change colors on Apple Watch. ## In case the numbers bore you, you can always play a song. It's Chopin-awesome! *** Tips *** - long press "backspace" button to clear whole expression (you can also force touch on your Watch) - long press the result on your iPhone/iPad to copy it to the system clipboard
Screenshots
Verdict
The clearest difference is rating: Solve at 4.7 against Classicalc calculator's 3.8. Solve also leads on update cadence (monthly vs every 20 months) and review sentiment (82% vs 63%). Classicalc calculator's advantage is device support (5 vs 3) and price ($0.99 vs $1.99). On ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Solve costs $1.99 and Classicalc calculator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Solve holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Solve has 200 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 82% of Solve's written reviews are positive against 63% of Classicalc calculator's.
Solve ships an update monthly, Classicalc calculator every 20 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Solve | Classicalc calculator |
|---|---|---|
| Price | $1.99 | $0.99 — better |
| Rating | 4.7 (200 ratings) — better | 3.8 (13 ratings) |
| Positive reviews | 82.5% of reviews — better | 62.5% of reviews |
| Number of ratings | 200 — better | 13 |
| Update frequency | Monthly — better | Every 20 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac, Apple Watch — better |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Pomegranate Apps LLC | Lukasz Kowalski |
Customer experience
Solve
Classicalc calculator
Bugs and requests
Solve
Reported bugs
9 issues- 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)
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- 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
Requested features
16 requests- 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
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- 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
Classicalc calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Solve
No in-app purchases
Classicalc calculator
No in-app purchases
Questions
Is Solve free?
Is Classicalc calculator free?
Which has better reviews, Solve or Classicalc calculator?
Do Solve or Classicalc calculator have ads?
Which is updated more often, Solve or Classicalc calculator?
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