# inchCALC+ > Construction calculator for feet, inches, and fractions with advanced functions. (iPhone/iPad app by River Studio.) - Source: https://appshunter.io/ios/app/inchcalc-plus/id293843441 (this page in markdown: same URL + `.md`) - Developer: [River Studio](https://appshunter.io/developer/293841499) - Category: Utilities, Productivity - Price: $4.99 - Rating: 3.70/5 from 17 App Store ratings · 82 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 19 MB - Languages: American English - Released: 2008-10-17 - Data updated: 2026-08-13 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/inchcalc-plus/id293843441/reviews.md ## What is inchCALC+? PRO LEVEL [FOOT • INCH • FRACTION] CALCULATOR MACWORLD **** "inchCALC+'s ease of use coupled with its advanced features make this an uncommonly good addition to a crowded genre." 3/9/09 inchCALC+ is a State-of-the-Art Construction Calculator / Conversion Calculator for people who work with the FEET• INCH• FRACTION dimensions used on common rulers and tape measures. These dimensions are shear drudgery when you have to manually add or subtract them --- let alone multiply, divide or convert to other measurement units. If you are a builder, contractor, sub-contractor, architect, engineer, artist, designer, student, homemaker or DIYer, you know the importance of working with accurate dimensions. inchCALC+ transforms your iPhone / iPod Touch into a FT• IN• FRACTION construction calculator that inputs and outputs dimensions exactly as they appear on a tape measure. Dedicated and held construction calculators with similar functions are very expensive. With inchCALC+ you can inexpensively perform the functions of those calculators on your iPhone / iPod Touch. Easy conversions to other measurement units: -FT• IN • FRACTION -IN • FRACTION -decimal inches -decimal feet -millimeters -centimeters -meters -kilometers -acres -yards -miles Built-in TRIANGLE FUNCTION -- Enter any two & inchCALC+ automatically solves for the other two: -rise -run -diagonal -pitch Selective Keyboard Orientation for Left Handed or Right Handed users DUAL MODES: -inchCALC for quickly working with simple measurements -inchCALC+™ for working with more complex problem solving -Built-in Functions: √2, X2, π, %, +/- See further details & User Guide on our website below: ## Key features - Feet, inch, fraction calculations - Conversions to various units - Triangle function for rise, run, diagonal, pitch - Dual modes for simple and complex problems - Selective keyboard orientation - Built-in math functions (sqrt, square, pi, percent) ## What do users think of inchCALC+? Overall sentiment: mixed **Pros** - 👍 Excellent for feet and inches calculations - 👍 Great for metric/imperial conversion - 👍 Practical and easy to use - 👍 Replaces expensive physical calculators - 👍 Smooth calculations and easy unit conversion - 👍 No learning curve, intuitive - 👍 Stable and reliable for years - 👍 Responsive developer (in some cases) - 👍 Good value for money - 👍 Handy for architects, builders, and tradesmen - 👍 Replaces old desk calculators - 👍 Good for field and office use - 👍 Well-designed interface **Cons** - 🐛 Crashes on newer iOS versions - 🐛 Not worth the money compared to free apps - 🐛 Missing simple but crucial features - 🐛 Outdated UI, not optimized for modern screens - 🐛 Buttons too small on landscape screen - 🐛 Inconsistent behavior on different devices/orientations - 🐛 Poor developer support for long-standing issues - 🐛 Some functions not as expected for carpenters (e.g., pitch in degrees) - 🐛 Rounding issues with 'diag' function - 🐛 Key lag and sound issues - 🐛 Blurry images on larger screens **Commonly reported bugs** - Crashes on iOS 14.2 - Does not recognize numbers 1, 2, 3 in landscape on mini2 retina - App freezes in landscape mode - Latest update does not download on iPhone 3GS - Not updated to fit any screen since iPhone 4 - Landscape view never starts up right on iPad - Blank borders on iPhone 6 - Freezes in landscape mode - Crashing on 4.0 - Right angle solver not great - Doesn't save in memory after closing - Always opens with a random number showing - Major bug: calc fix and stay after restarting - Rounding calculations with the 'diag' function - Pitch is read only in degrees - Cannot solve for RISE when RUN and PITCH are known - Area formulas are cut off at the bottom - Key lag - Key sound triggered by lifting finger, not initial touch - Slow flipping to advanced version with tilting **Most requested features** - Add a tape-like function - Improve vertical calculator conversion settings - Add a history view option - Allow storing and further calculation with results - Add a backspace key - Update UI for modern iOS versions - Optimize for larger screens (iPhone 6/6 Plus, iPad) - Add a desktop version - Add a CE (cancel entry) button in portrait mode - Allow pitch entry in inches/slope ratios, not just degrees - Add stair and roof functions - Add copy/paste function in display - Add constant storage or memory - Add ability to convert decimals to fractions and vice versa - Add clear entry for vertical calculator - Make buttons larger in horizontal mode - Add examples to website for complex calculations - Allow users to submit tips and tricks - Option to turn off key clicks or use standard iPhone click sound - Display remainder when dividing fractions or an 'R' indicator - Add a graph for pitch, rise, and run - Ability to convert from foot/inches to decimal without performing a calculation - Attach formulas to buttons with labels - Add more complicated formulas - Fix slow rotation between orientations - Fix scrolling to the bottom of information screens - Add area of circles or volumes of cylinders - Add intuitive interface for rafter diagonals ## Recent user reviews (10 of 82) All indexed reviews: https://appshunter.io/ios/app/inchcalc-plus/id293843441/reviews.md ### 5/5 — The best architectural calculator I found *2023-07-01* I have been using this app for years and it is by far the best I was able to find. None of the others have mastered the input of feet and inches. The calculations are smooth and the units convert so easily. Please, please continue making this available. I am happy to pay even again if you can add a tape like function and maybe make the vertical one with easier conversion settings now that our screens are often bigger. This is my daily architectural calculator I never want to miss. ### 5/5 — Great converter *2021-04-08* I like this calculator. It is a great calculator to use as a converter between metric and imperial. Very practical and easy to use. ### 1/5 — Crashes IOS 14.2 *2020-11-19* Developer please update app. ### 1/5 — Not worth the money *2020-11-16* Paid $6.99 expecting this to be better than the other free apps. This was a waste of my money as a find the free apps work just as well and better. ### 4/5 — Great but missing a few simple things *2019-12-28* Been using the free version for years but need to do calc for run, rise, diag. The app handles it easily but you can’t store the results or do further math with the results. For example. Calc the diag of 4x4s 8’ apart. Easy but now subtract the diag of the 4x4s to get the inside measurements. Can’t do that. Can’t even save either diag measurements. Need a good memory or paper and pen. Hopefully a future enhancement. Love the app anyway. ### 1/5 — Don't ,They Broke It *2018-05-01* The Developer actually just responded to a 2 year old review that you can read below xD seriously ? Great Bug Fixing Had to reinstall the 1.7.4 version As this Version does not recognize the numbers 1,2 and 3 in landscape on my mini2 retina and GOD knows (whatever god you subscribe to) what else is broke if I can't even type 1,2 or 3 into it... Do not update (youve been warned) **Developer response:** sounds like you have a corrupt file -- delete & reload -- Apple will not charge you for an App previously purchased ### 2/5 — Not bad, could be better *2017-11-15* There are a lot of great things about this app that I love. I love that it’s simple, easy to use, and for me, super handy. The downside is I can see this app has not been updated to fit any screen since iPhone 4. Also, there needs to be a back space. I cannot tell you how many times I’ve input the wrong measurement just to have to start all over again. I think that would be a good start in fixing this app **Developer response:** the PRO version, INCHCALC+, includes both "Clear Entry" & "Backspace" key -- hope that soles your issue ### 5/5 — Hands down best inch calculator on the App Store *2017-01-24, version 2.0.3* I have tried several different architectural calculators and this one is still my favorite for years. Only thing I would like to see added is a history view option, which would make it even better. ### 5/5 — Great app *2017-01-24* I love the function of this app... I haven't found anything else that does fractions as well. After some recent bug fixes, this is back to 5-stars. I wish there was a desktop version. ### 4/5 — Update! *2016-11-06, version 2.0.1* Love the app. Use it all the time but it's time for an update. Flatten it like iOS 7+ and take advantage of the 6/6 plus screen!! ## Frequently asked questions about inchCALC+ ### What does inchCALC+ do? inchCALC+ is a professional-level construction and conversion calculator designed for users who work with dimensions in feet, inches, and fractions. It simplifies complex calculations involving these measurements, such as addition, subtraction, multiplication, and division, and can convert them to various other units. ### What are the key features of inchCALC+? Key features include the ability to perform calculations with feet, inches, and fractions, easy conversions to units like decimal inches, meters, and acres, and a built-in triangle function to solve for rise, run, diagonal, and pitch. It also offers dual modes for simple and complex problem-solving and selective keyboard orientation. ### How much does inchCALC+ cost? The application is a paid app. Dedicated construction calculators with similar advanced functions can be very expensive, but this app offers those capabilities on your iPhone or iPod Touch at a lower cost. ### What devices is inchCALC+ compatible with? The app is designed for iPhone and iPod Touch devices. It transforms these devices into a FT• IN• FRACTION construction calculator that inputs and outputs dimensions exactly as they appear on a tape measure. ### Who would benefit from using inchCALC+? This app is ideal for anyone who frequently works with measurements in feet and inches, including builders, contractors, sub-contractors, architects, engineers, artists, designers, students, homemakers, and DIY enthusiasts. It is particularly useful for tasks where manual addition or subtraction of these dimensions would be tedious. ## Version history (last 5 releases) ### 2.0.3 — 2017-01-23 This app has been updated by Apple to display the Apple Watch app icon. • Device rotation fixes. ### 2.0.1 — 2016-11-06 ● New behavior for "dec in" and "dec ft" buttons. ● New layouts for advanced calculator on larger screen iPhones. ### 1.7.6 — 2015-12-12 Fixed inactive keys in landscape mode. ### 1.7.5 — 2015-11-24 Bug fixes. ### 1.7.4 — 2013-12-18 UI fixes for iOS 7.0 ## Apps similar to inchCALC+ | App | Rating | Price | Category | | --- | --- | --- | --- | | [Pipe Trades Pro Calc](https://appshunter.io/ios/app/pipe-trades-pro-calc/id596142100) | 4.8 (3,563) | Free | Utilities | | [Construction Master Pro Calc](https://appshunter.io/ios/app/construction-master-pro-calc/id370406446) | 4.8 (39,303) | Free | Utilities | | [Concrete Calculator Plus](https://appshunter.io/ios/app/concrete-calculator-plus/id1494386815) | 4.8 (21,304) | Free | Utilities | | [Construction Calculator](https://appshunter.io/ios/app/construction-calculator/id1092417398) | 4.7 (554) | Free | Utilities | | [Feet & Inches Tape Calculator](https://appshunter.io/ios/app/feet-and-inches-tape-calculator/id1434258634) | 4.4 (9,246) | Free | Utilities | | [Material Estimator Calculator](https://appshunter.io/ios/app/material-estimator-calculator/id376071081) | 4.8 (2,927) | Free | Utilities | ## More apps by River Studio - [inchCALC](https://appshunter.io/ios/app/inchcalc/id293841496) All apps by River Studio: https://appshunter.io/developer/293841499 --- *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 2026-08-13.*