Solve vs Construction 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!)
Construction Calculator++
This app provides specialized calculations for construction projects, including volume, area, and material estimation. It offers tools for unit conversions, rafter calculations, and circle/arc measurements, aiding in accurate project planning and execution.
- Length-Width-Height calculations for area, volume, and wall area
- Material estimation for bricks, blocks, pavers, and tiles
- Drywall sheet quantity calculation
- Linear measure addition, subtraction, and conversion
- Rafter calculations for common, hip, valley, and jack rafters
- Circle and arc parameter calculations with visual plots
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The creators of top ranked Statistics Calculator++ for iPhone and Statistics Calculator+++ for iPad, present Construction Calculator++, designed for construction math solutions and unit conversions. Construction Calculator++ comes with the following features: - Length-Width-Height Module: You can enter Length, Width, or Height values in Yard-Feet-Inch-Fractions, Decimal Feet, Decimal Inches, and Yards. Enter the Length and Width to calculate Area, Perimeter (of a room), and Square-up. In addition, enter the Height to calculate the Volume, Wall Area, and Total Room Area. You can enter any single length value and convert it to other dimensions, for example from Feet-Inch-Fractions to Decimal Feet or Decimal Inches or back. Furthermore you can tap on any calculated dimension to convert it to other dimensions. If the calculated value is Volume you can tap and see its conversion to Board Feet. - Bricks/Blocks/Pavers/Tiles Function calculates the number of Bricks/Blocks/Pavers/Tiles needed for a certain length or area. You can use the standard 8-inch x 16-inch size block/mortar (area of 128 square inches) or enter custom block size by height and length or area. Furthermore, this function allows you to quickly and simply add a waste allowance to the number of blocks calculated. - Drywall Sheets Function calculates the number of 4 x 8, 4 x 9, and 4 x 12 feet sheets required for an area or length. Furthermore, you can add your own custom size of Drywall Sheets. - Add, subtract, or convert linear measures with different units. The units include yard, feet, inches, inch fractions, meters, centimeters and millimeters. - Rafter Module: Enter any two of the four parameters, Rise, Run, Diagonal, or Pitch to calculate the unknowns. Run, Rise, and Diagonal values can be entered in Feet, Inches and Inch fractions or Decimal Feet and Decimal Inches. Pitch can be entered as a dimension in inches which is the amount of rise over 12 inches of run. Furthermore, Pitch can be entered as an angle in degrees, a percent grade or slope (pitch ratio). Tap on any of the values to see its conversion to other formats. In addition to Common Rafter, you can perform calculations of Regular and Irregular Hip/Valley and Jack Rafters. You can also calculate Plump and Level cut angles. Simply enter known values of Common Rafter and you are done. Length and cut angles of the adjoining Hip (or Valley) rafters, Incremental Jack Adjustment, Regular/Irregular Jack Rafter Lengths and Cut Angles for 16 Inch On Center Spacing are all automatically calculated. You can also enter an On Center Spacing other than 16 Inches. - Circle and Arc Module: Solves for parameters of circle and arc. The parameters include radius, diameter, area, circumference, arc length, arc angle, chord length (run), segment rise (rise), segment area, and pie slice area. A plot of circle or arc and its parameters is drawn to scale to visualize the parameters for you . - Shows the expression as you enter and keeps a history of your calculations (Swipe up on the screen to reveal the history) - Capability of performing fraction manipulations and converting between different formats (proper, improper, and mixed fractions) and seamless integration of fraction, integer, and decimal manipulations. - Capability of inputting degrees, minutes, and seconds for angles and converting between degrees-minutes-seconds format and decimal format. - The left pane scrolls to reveal more functionality without a need to switch modes. The digits and most common operations are always visible and the less common operations can be revealed by scrolling the left half of the screen. - Sinusoidal functions can be calculated for angles in units of degrees, radians, or gradians.
Screenshots
Verdict
The clearest difference is rating: Solve at 4.7 against Construction Calculator++'s 4.2. Solve also leads on ratings volume (198 vs 50). Construction Calculator++'s advantage is price ($0.99 vs $1.99) and iOS requirement (13.0 vs 15.6). On review sentiment, update cadence, 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 Construction 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 4.2. Both are backed by a comparable volume of ratings — 198 and 50 respectively. Written reviews point the same way: 82% of Solve's written reviews are positive against 75% of Construction Calculator++'s.
Solve ships an update monthly, Construction Calculator++ every 3 weeks. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.
| Parameter | Solve | Construction Calculator++ |
|---|---|---|
| Price | $1.99 | $0.99 — better |
| Rating | 4.7 (198 ratings) — better | 4.2 (50 ratings) |
| Positive reviews | 82.5% of reviews — better | 75.0% of reviews |
| Number of ratings | 198 — better | 50 |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Pomegranate Apps LLC | Dogahe |
Customer experience
Solve
Construction 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
Construction Calculator++
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Solve
No in-app purchases
Construction Calculator++
No in-app purchases
Questions
Is Solve free?
Is Construction Calculator++ free?
Which has better reviews, Solve or Construction Calculator++?
Do Solve or Construction Calculator++ have ads?
Which is updated more often, Solve or Construction Calculator++?
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