# Mohr's Circle vs Engineering Survey Calculator

The clearest difference is review sentiment: Mohr's Circle at 43% against Engineering Survey Calculator's 0%. Mohr's Circle also leads on chart position (#191 vs unranked) and ratings volume (3 vs 1). Engineering Survey Calculator's advantage is rating (5.0 vs 3.3) and price ($2.99 vs $5.99). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Mohr's Circle costs $5.99 and Engineering Survey Calculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Engineering Survey Calculator holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews complicate that: 43% of Mohr's Circle's written reviews are positive against 0% of Engineering Survey Calculator's, so the app with the better star average is not the one people write more warmly about.

Mohr's Circle ships an update every 15 months, Engineering Survey Calculator every 24 months. The most recent releases landed on September 16, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Mohr's Circle | Engineering Survey Calculator |
| --- | --- | --- |
| Price | $5.99 | **$2.99** |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/mohrs-circle/id395110520/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/engineering-survey-calculator/id641965073/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | **42.9% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 15 months** | Every 24 months |
| Monetization | Paid | Paid |
| Best chart rank | **#191** | — |
| Size | 8 MB | 6 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [J.R.Hobbs](https://appshunter.io/developer/395110523) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## What reviewers say

### Mohr's Circle

[App page](https://appshunter.io/ios/app/mohrs-circle/id395110520)

**Currently charting:** #191 Top Paid · Utilities (US App Store)

This application assists users in performing Mohr's Circle calculations and verifying their diagrams. It offers solutions for 2D plane stress, calculates various stress values, and generates graphical representations of stress states. Users can also share results and store multiple stress states.

**Highlights:** 2D Plane Stress Mohr's Circle Solutions, Max, Min, and Shear Stress Calculations, Principal Stress Plane Angle, Mohr's Circle Diagram, Stress State Rotation Views, Shareable Results, Unit Conversion (English/Metric)

**Features:** Vision Pro support

**In-app purchases:** none


### Engineering Survey Calculator

[App page](https://appshunter.io/ios/app/engineering-survey-calculator/id641965073)

This app provides 33 essential calculators for surveying, measurement, and civil engineering tasks. It supports both Imperial (USCS) and Metric (SI) units, making it a versatile tool for engineers and surveyors on iOS devices.

**Highlights:** 33 specialized calculators, Surveying and measurement tools, Civil engineering parameters, Imperial (USCS) and Metric (SI) units, Available for iPhone and iPad

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Mohr's Circle free?

Mohr's Circle costs $5.99, with no in-app purchases.

### Is Engineering Survey Calculator free?

Engineering Survey Calculator costs $2.99, with no in-app purchases.

### Which has better reviews, Mohr's Circle or Engineering Survey Calculator?

Engineering Survey Calculator is rated higher. Mohr's Circle averages 3.3 out of 5 from 3 ratings, while Engineering Survey Calculator averages 5.0 from 1 ratings.

### Do Mohr's Circle or Engineering Survey Calculator have ads?

Neither Mohr's Circle nor Engineering Survey Calculator shows ads.

### Which is updated more often, Mohr's Circle or Engineering Survey Calculator?

Mohr's Circle ships an update every 15 months, and Engineering Survey Calculator every 24 months. Most recently, Mohr's Circle was updated on September 16, 2026 and Engineering Survey Calculator on September 18, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*