# Trigonometry Help vs Pipe Trades Pro Calc

Trigonometry Help and Pipe Trades Pro Calc both sit at 4.7 stars, but that hides the real split: 91% of Trigonometry Help's written reviews are positive against 42% of Pipe Trades Pro Calc's. Trigonometry Help also leads on iOS requirement (10.0 vs 14.0). Pipe Trades Pro Calc's advantage is price (Free vs $1.99) and chart position (#195 vs unranked). On rating, update cadence, ads and in-app purchases there is nothing between them.

Pipe Trades Pro Calc is free to download; Trigonometry Help costs $1.99 up front. Trigonometry Help sells 3 one-off in-app purchases and Pipe Trades Pro Calc sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Trigonometry Help against 4.8 for Pipe Trades Pro Calc. That said, the two scores are not equally well evidenced: Pipe Trades Pro Calc has 4.3K ratings behind it against 477, so its average is the more settled of the two. Written reviews are what separate them: 91% of Trigonometry Help's written reviews are positive against 42% of Pipe Trades Pro Calc's.

Trigonometry Help ships an update every 13 months, Pipe Trades Pro Calc every 7 months. The most recent releases landed on September 23, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Trigonometry Help | Pipe Trades Pro Calc |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.7 (477 ratings)](https://appshunter.io/ios/app/trigonometry-help/id411415648/reviews) | **[4.8 (4.3K ratings)](https://appshunter.io/ios/app/pipe-trades-pro-calc/id596142100/reviews)** |
| Number of ratings | 477 | **4.3K** |
| Positive reviews | **90.8% of reviews** | 42.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 7 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | — | **#195** |
| Size | 21 MB | 51 MB |
| Requires iOS | **10.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 12+ |
| Developer | [Armchair Engineering](https://appshunter.io/developer/398901339) | [Calculated Industries](https://appshunter.io/developer/370406449) |

## What reviewers say

### Trigonometry Help

[App page](https://appshunter.io/ios/app/trigonometry-help/id411415648)

This app helps you quickly solve for unknown angles and sides of right-angled triangles. It provides a workings view for understanding the math, a scale drawing of the triangle, and a reference for basic trigonometric formulas. You can input angles in various formats and choose your desired decimal precision.

**Highlights:** Solve right-angled triangles, Workings view for solutions, Scale drawing of solved triangle, Basic trig formulae reference, Multiple angle input formats, Customizable decimal places

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Trig Help Premium | $0.99 | one-time |
| Trig Help Premium | $1.99 | one-time |
| Trig Help Premium | $3.99 | one-time |

**What reviewers like**

- 🚀 Quick and easy to use
- 👍 User-friendly interface
- 🔧 Helpful for tradesmen and professionals
- ⚙️ Accurate calculations
- 🔍 Convenient for on-site use

**What reviewers complain about**

- 🔢 Limited to right-angled triangles only
- 🔍 Lacks advanced trig functions
- 🔀 No option to rotate/flip the triangle view

**Reported bugs**

- Inconsistent performance on older devices
- Occasional crashes or freezes

**Requested features**

- Support for irregular triangles
- Ability to show step-by-step workings
- Option to switch between degrees/minutes/seconds and decimal values


### Pipe Trades Pro Calc

[App page](https://appshunter.io/ios/app/pipe-trades-pro-calc/id596142100)

**Currently charting:** #195 Top Grossing · Utilities (US App Store)

This app provides advanced calculation tools and comprehensive data for pipe trade professionals. It streamlines workflows for pipefitters, welders, and steamfitters with features for measurements, fluid dynamics, and material specifications. Designed for efficiency and accuracy, it works offline for on-site use.

**Highlights:** Advanced measurement calculations, Fluid dynamics and pressure analysis, Comprehensive pipe data access, Offline functionality, User-centric interface, Material and dimension options

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Full Access | $4.99 | per month |
| 1 Year Full Access | $39.99 | per year |

**What reviewers like**

- 🔢 Useful calculator tool
- 🧠 Helpful for pipe fitters and welders
- 📱 Convenient to have on mobile device
- 🔍 Accurate calculations

**What reviewers complain about**

- 💰 Subscription model is too expensive
- 🔒 Requires internet connection to verify subscription
- 🔄 Used to be a one-time purchase
- 🤔 Confusing transition from one-time to subscription

**Reported bugs**

- App freezes or stops working after updates
- Calculation errors with fractions
- Issues with reinstalling or transferring purchases

**Requested features**

- Ability to use app without subscription
- Support for larger pipe sizes
- Add a back/undo button
- Rotate screen orientation


## Frequently asked questions

### Is Trigonometry Help free?

Trigonometry Help costs $1.99, and also offers in-app purchases.

### Is Pipe Trades Pro Calc free?

Pipe Trades Pro Calc is free to download, with in-app purchases available.

### Which has better reviews, Trigonometry Help or Pipe Trades Pro Calc?

Pipe Trades Pro Calc is rated higher. Trigonometry Help averages 4.7 out of 5 from 477 ratings, while Pipe Trades Pro Calc averages 4.8 from 4.3K ratings.

### Do Trigonometry Help or Pipe Trades Pro Calc have ads?

Neither Trigonometry Help nor Pipe Trades Pro Calc shows ads.

### Which is updated more often, Trigonometry Help or Pipe Trades Pro Calc?

Trigonometry Help ships an update every 13 months, and Pipe Trades Pro Calc every 7 months. Most recently, Trigonometry Help was updated on September 23, 2026 and Pipe Trades Pro Calc on September 27, 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.*