Home Improvement Calcs vs CMCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Home Improvement Calcs
This app provides over 250 DIY and home improvement calculations and unit conversions. Easily solve a variety of tasks, save and share your results, and quickly find the tool you need.
- 250+ DIY calculations
- Unit conversions
- Save and open calculations
- Add to favorites
- Email results
- Search functionality
- Decimal or fraction results
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Home Improvement Calcs has over 250 do-it-yourself and home improvement calculations and unit conversions. Home Improvement Calcs gives you access to quickly and easily solve a variety of calculations from your iPhone or iPad. Easy to use and understand inputs and results in either decimals or fractions. Not just calculators but the ability save and open saved calculations and add calculators to a favorites list. You can also email calculator inputs and results so you can easily share your calculations. Search functionality enables you to quickly find the calculator you want. Current Calculators include: Concrete & Bricks * Asphalt * Block Wall - Based on Area * Block Wall - Based on Length and Height * Brick Wall * Concrete Column or Circular Slab * Concrete Footings * Concrete Post Holes * Concrete Rectangular Slab * Paver Bricks * Sand * Stone Retaining Wall Electrical * Amps from Watts and Volts * Amps Required for Circuit * Electricity Cost * Volts from Amps and Watts * Watts from Amps and Volts Framing * Rafter Length for Common - Pitch * Rafter Length for Common - Pitch Unknown * Rafter Types * Roofing Terms * Roof Pitch * Roof - Degrees to Pitch, Slope and Grade * Roof - Pitch to Degrees, Slope and Grade * Roof - Slope to Pitch, Degrees and Grade * Roof - Grade to Pitch, Degrees and Slope * Square Construction * Staircase * Stairs Best Step Height * Stairs Best Tread Width Heating & A/C * Airflow * Attic Ventilation * Ceiling Fan Sizing * Exhaust Fan Sizing Based on Fixtures * Exhaust Fan Sizing Based on Room Size * Heating Estimator * Whole House Fan * Window Air Conditioner Size Interiors * Carpet and Linoleum * Interior Paint * Tile * Tongue & Groove Flooring * Wallpaper Lumber & Materials * Board Feet and Cost * Caulking Length * Caulking Required * Drywall - Advanced * Drywall - Basic * Insulation - Attic * Insulation R-Value * Lumber Dimensions * Roofing Materials from Area * Roofing Materials from Pitch, Length and Width * Studs Miscellaneous * Belts and Pulleys * Cylindrical Tank - Horizontal Level * Cylindrical Tank - Vertical Level * Leaking Faucet Water Usage * Tank Fill Time * Weight of Liquids * Wrench Conversion Yard * Acreage * Backfill * Backfill on a Slope * Driveway Sealer * Fertilizer Coverage and Cost * Fertilizer - Nitrogen * Fill & Ground Cover * Grade from Rise and Run * Grade from Slope Length and Rise * Insecticide Coverage and Cost * Plant Quantity * Lawn Grass Coverage and Cost * Lawn Mowing * Sand Box * Mulch * Tree Height * Yard Area Area, Volume & Angle * Arc Length, Area, and Perimeter * Circle Area and Circumference * Cone * Cube (or Box) Surface Area and Volume * Cylinder Surface Area and Volume * Polygon Area and Sides from Apothem * Polygon Area and Sides from Radius * Pyramid * Rectangle Area and Perimeter * Trapezoid Area * Triangle Angle and Diagonal * Triangle Rise and Diagonal * Triangle Rise and Run * Triangle Area * Sphere Surface Area and Volume * Square Area and Perimeter Conversions * Airflow * Air Pressure * Angle * Area * Density * Electrical Current * Electrical Power * Electrical Voltage * Energy * Flow Rate * Fluid * Fuel Mileage * Length * Mechanical Power * Money * Speed * Temperature * Torque * Volume * Weight Sensor Angles * A set of 10 calculators that use the device's angle sensing ability to easily and accurate measure an angle. Project Estimator * Over 55 different estimators for Carpentry, Installation, Concrete and more. Project Dates & Times * Over 35 calculators help you understand and manage project timing and deadlines. More calculators coming soon in free updates! If there's a calculator you'd like to see added, visit our website and send us an email.
CMCalc
This app emulates a classic 1980s computer math calculator, offering decimal arithmetic, binary conversions, and logic functions. It supports parentheses for complex calculations and includes modern features like copy/paste and landscape mode.
- Decimal arithmetic
- Binary conversions (decimal, binary, octal, hexadecimal)
- Binary logic functions
- Operator grouping with parentheses
- Hexadecimal input (A-F)
- Copy and paste results/functions
- Landscape mode
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The CMCalc application is a replica of the Casio CM-100 Computer Math Calc solar powered calculator that was sold in the mid 1980’s. It performs simple decimal arithmetic and basic binary conversions (decimal - binary - octal - hexadecimal) and binary logic functions. While it is a standard infix calculator, it supports operator grouping with parentheses. For hexadecimal calculations, the input keys include A through F. CMCalc application performs all the same functions as the calculator, and has the same look as the original. There are a couple features that were not conceivable in the 1980’s on a calculator … such as the ability to copy and paste the results or the entered function, and a landscape mode for devices with 4 inch or larger screens. The face of the calculator can be viewed in two modes including a traditional application style, and a photo replica of the original calculator face.
Screenshots
Verdict
The clearest difference is price: CMCalc at Free against Home Improvement Calcs's $4.99. Home Improvement Calcs's advantage is update cadence (every 3 months vs every 45 months) and review sentiment (88% vs 67%). On ads, in-app purchases, monetization model and device support 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
CMCalc is free to download; Home Improvement Calcs costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Home Improvement Calcs holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Home Improvement Calcs has 104 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 88% of Home Improvement Calcs's written reviews are positive against 67% of CMCalc's.
Home Improvement Calcs ships an update every 3 months, CMCalc every 45 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.
| Parameter | Home Improvement Calcs | CMCalc |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.8 (104 ratings) — better | 4.6 (7 ratings) |
| Positive reviews | 88.2% of reviews — better | 66.7% of reviews |
| Number of ratings | 104 — better | 7 |
| Update frequency | Every 3 months — better | Every 45 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #197 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.3 — better | 12.0 |
| Further details — not scored | ||
| Size | 16 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Calculated Industries | William David |
Customer experience
Home Improvement Calcs
CMCalc
In-app purchases
Home Improvement Calcs
No in-app purchases
CMCalc
No in-app purchases
Questions
Is Home Improvement Calcs free?
Is CMCalc free?
Which has better reviews, Home Improvement Calcs or CMCalc?
Do Home Improvement Calcs or CMCalc have ads?
Which is updated more often, Home Improvement Calcs or CMCalc?
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