# Mohr's Circle vs Drought Pipeline Project

The clearest difference is price: Drought Pipeline Project at Free against Mohr's Circle's $5.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Drought Pipeline Project is free to download; Mohr's Circle costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mohr's Circle ships an update every 15 months, Drought Pipeline Project every 8 months. The most recent releases landed on October 23, 2026 and December 8, 2025 respectively.

## The numbers

| Metric | Mohr's Circle | Drought Pipeline Project |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/mohrs-circle/id395110520/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 8 months** |
| Monetization | Paid | — |
| Size | 8 MB | 20 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [J.R.Hobbs](https://appshunter.io/developer/395110523) | [Kiewit Corporation](https://appshunter.io/developer/1125546506) |

## What reviewers say

### Mohr's Circle

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

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


### Drought Pipeline Project

[App page](https://appshunter.io/ios/app/drought-pipeline-project/id1538466477)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mohr's Circle free?

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

### Is Drought Pipeline Project free?

Drought Pipeline Project is free to download, with no in-app purchases.

### Do Mohr's Circle or Drought Pipeline Project have ads?

Neither Mohr's Circle nor Drought Pipeline Project shows ads.

### Which is updated more often, Mohr's Circle or Drought Pipeline Project?

Mohr's Circle ships an update every 15 months, and Drought Pipeline Project every 8 months. Most recently, Mohr's Circle was updated on October 23, 2026 and Drought Pipeline Project on December 8, 2025.

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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.*