# Slope Calculator — Construction & Survey

> Professional grade slope, elevation, and distance calculator for field professionals. (iPhone/iPad app by John Lein.)

- Source: https://appshunter.io/ios/app/slope-calculator/id550839577 (this page in markdown: same URL + `.md`)
- Developer: [John Lein](https://appshunter.io/developer/504182228)
- Category: Productivity
- Price: $9.99 (on sale, was $13.99)
- Rating: 5.00/5 from 1 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 2 MB
- Languages: American English
- Released: 2012-08-15
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/slope-calculator/id550839577/reviews.md

## What is Slope Calculator?

SLOPE - PROFESSIONAL GRADE CALCULATIONS FOR SURVEYORS, ENGINEERS & CONTRACTORS

Slope 5.0 represents a complete ground-up rebuild of the app trusted by thousands of professionals. Built entirely with modern SwiftUI and powered by iCloud, Slope delivers lightning-fast slope, elevation, and distance calculations right at your fingertips.

THREE POWERFUL CALCULATORS IN ONE APP

Slope Calculator Input Point A elevation, Point B elevation, and horizontal distance to instantly calculate elevation difference, slope as a decimal, and slope as a percentage. Perfect for grading plans, site analysis, and verifying field measurements.

Elevation Calculator Enter slope percentage, horizontal distance, and starting elevation to determine elevation difference and true elevations in both positive (upward) and negative (downward) directions. Ideal for planning drainage, roads, and accessibility ramps.

Distance Calculator Input slope percentage and elevation change to calculate the horizontal distance required. Essential for estimating project scope and material quantities.

MODERN FEATURES DESIGNED FOR THE FIELD

iCloud Sync Across All Your Devices Your projects, calculations, and field notes automatically sync across your iPhone and iPad through iCloud. Start measurements on site with your iPhone and review them later on your iPad in the office - your data is always up to date.

Organize by Project Create unlimited projects to keep calculations organized by job site, client, or phase. Each project maintains its own set of calculations and field notes, making it easy to reference past work or generate reports.

Field Notes & Shot Naming Save important calculations with custom names and notes. Label each shot for easy reference later - "Property Corner NW," "Driveway Grade," "Foundation Elevation" - whatever helps you stay organized.

Visual Diagrams Every calculator includes color-coded visual diagrams that update in real-time as you enter data. See the slope relationship between points graphically, making it easier to communicate with clients and crew members.

Imperial & Metric Units Switch instantly between feet and meters with a single tap. All calculations and saved data automatically convert, so you can work with whatever unit system your project requires.

Real-Time Calculation Results update instantly as you type - no need to tap a calculate button. The faster workflow means more measurements in less time.

Precision When You Need It All results display with 3 decimal places using locale-aware number formatting. Whether you're working to tenths or thousandths, Slope delivers the precision your work demands.

BUILT FOR PROFESSIONALS

Slope 5.0 is specifically designed for surveyors, civil engineers, landscape architects, grading contractors, and construction professionals who need accurate slope calculations on demand. The intuitive interface means less time fumbling with a calculator and more time getting work done.

WHAT MAKES VERSION 5.0 SPECIAL

This isn't an update - it's a complete rewrite. Every line of code was reimagined using Apple's latest technologies including SwiftUI, SwiftData, and CloudKit. The result is an app that's faster, more reliable, and more powerful than ever before.

UNIVERSAL APP One purchase works on both iPhone and iPad with interfaces optimized for each device size. Use your iPhone in the field and your iPad in the office - all with the same app.

NO SUBSCRIPTION REQUIRED Pay once and own it forever. No monthly fees, no feature limitations, no ads. Professional tools at a one-time price.

WHAT USERS SAY

Professionals rely on Slope every day for accurate, fast calculations. Whether you're checking grades, verifying survey shots, or planning drainage, Slope delivers the results you need when you need them.

Download Slope 5.0 and experience the most advanced slope calculation app ever built for iOS. Your projects deserve professional-grade tools.

## Key features

- Slope, elevation, and distance calculations
- iCloud sync across devices
- Organize by project
- Field notes and shot naming
- Real-time visual diagrams
- Imperial and metric unit support

## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/slope-calculator/id550839577/reviews.md

### 5/5 — Site development

*2022-07-02, version 3.3*

I bought this to make quick elevation and slope changes. Works great for in field site work along with structure and pipe elevations. It is a simple calculator that has an algorithm. I love it!

### 1/5 — Downloaded by accident can’t get a refund

*2020-11-11*

Annoying

### 1/5 — Not all settings work ?

*2020-07-03*

When I try to use the ”Distance” option. The app turns off. ??

Need some assistance / app fixed

### 5/5 — Surveyor on pipe crew

*2019-01-27*

As a surveyor on a pipe crew I use this app everyday, saves so much time!

### 1/5 — Glorified calculator

*2017-02-07*

I needed an app that automatically measures distance and slope. This app does the same as a normal calculator; everything has to be put in manually. Not worth the double digit price!

**Developer response:** Thanks for the feedback.  Many contractors / students / homeowners do not use these types of calculations often enough to remember the formula to calculate slopes, elevations etc.  I designed this app for that specific reason.  I guess, it is a glorified calculator, but I guess you could say that for thousands of other apps on the app store.

I'd like to think the app has a clean easy to use interface that provides worthwhile information to the end user.

I'm not sure of any iPhone device having the ability to measure distance / slope accurately without actually using survey equipment.  Our app is an end user slope calculator just as the name suggests.

### 3/5 — Would be a five if it had a inch input on both measurements

*2013-06-23*

I with you could input both feet and inches into both measurements, that would make this the perfect app. Overall still a good app.

**Developer response:** Something we are working on! Thanks for the feedback.   As a surveyor, our imperial measuring system is the decimal (tenths)... Builders, like you, may prefer the resultant answer to be displayed in feet and inches...

### 5/5 — Slope calculator

*2013-01-30*

Fantastic app makes quick easy work of all calculations.

**Developer response:** Thanks for the feedback!

## Frequently asked questions about Slope Calculator

### What is the price of Slope Calculator?

Slope Calculator is a paid app, priced at $9.99. This one-time purchase grants you access to all its professional-grade calculation features.

### Does Slope Calculator have ads?

No, Slope Calculator is ad-free. This allows for an uninterrupted and focused user experience, crucial for professional fieldwork.

### What devices does Slope Calculator support?

Slope Calculator is available for iPhone and iPad. Its iCloud sync feature ensures your data is consistent across all your Apple devices.

### How often is Slope Calculator updated?

The latest version, 5.0, was last updated on January 14, 2026. This indicates a commitment to maintaining and improving the application.

### What is the age rating for Slope Calculator?

Slope Calculator has an age rating of 4+. This suggests it is suitable for a wide range of users, though its professional features are geared towards adults.

### Can I organize my calculations by project in Slope Calculator?

Yes, Slope Calculator allows you to create unlimited projects to keep your calculations organized by job site, client, or phase. Each project maintains its own set of calculations and field notes.

### Does Slope Calculator offer visual diagrams?

Yes, every calculator within Slope Calculator includes color-coded visual diagrams that update in real-time as you enter data. This helps in graphically communicating slope relationships.

### What kind of precision does Slope Calculator offer?

Slope Calculator displays all results with 3 decimal places using locale-aware number formatting, ensuring the precision required for professional work.

## Version history (last 5 releases)

### 5.0 — 2026-01-14

Version 5.0 has been completely rewritten. See Description for full info.

### 4.0 — 2025-04-03

Now users in countries that use a comma instead of a decimal will get proper answers.

### 3.4 — 2023-03-05

Updated to iOS 16.2
Moved Action Buttons Up - some users were not able to see action buttons, so we moved them up higher for a better user experience
Fixed a few bugs in code

### 3.3 — 2021-11-05

Updated to iOS 15.0
Added Project Area - as a record entry so you can track specific location of your survey results
Added Project Notes - as a record entry so you can track specific notes on your survey results making it easier to understand where you took the measurement and what it related to on your project. Very useful for taking multiple readings on a project

### 3.2 — 2019-09-02

Updated to iOS 12
Adjusted views to take advantage of new iPhone X screen sizes
Adjusted / scaled all tab bars and tab icons to work with all iPhone sizes
Adjusted all images / text to align properly
Added version number, so user can reference if using current version of app

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## More apps by John Lein

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All apps by John Lein: https://appshunter.io/developer/504182228

## Related topics

[slope calculation tool](https://appshunter.io/ios/topics/slope-calculation-tool) · [slope calculator](https://appshunter.io/ios/topics/slope-calculator)

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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 2026-08-24.*