# Trigonometry Help vs Mike Holt's Electrical Toolbox

The clearest difference is price: Mike Holt's Electrical Toolbox at Free against Trigonometry Help's $1.99. Mike Holt's Electrical Toolbox also leads on in-app purchases (none vs 3) and update cadence (every 3 months vs every 13 months). Trigonometry Help's advantage is review sentiment (91% vs 77%) and iOS requirement (10.0 vs 14.0). On rating, ratings volume, ads and device support there is nothing between them.

Mike Holt's Electrical Toolbox is free to download; Trigonometry Help costs $1.99 up front. Trigonometry Help sells 3 one-off in-app purchases. Mike Holt's Electrical Toolbox asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Trigonometry Help against 4.6 for Mike Holt's Electrical Toolbox. Both are backed by a comparable volume of ratings — 477 and 197 respectively. Written reviews are what separate them: 91% of Trigonometry Help's written reviews are positive against 77% of Mike Holt's Electrical Toolbox's.

Trigonometry Help ships an update every 13 months, Mike Holt's Electrical Toolbox every 3 months. The most recent releases landed on September 23, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Trigonometry Help | Mike Holt's Electrical Toolbox |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.7 (477 ratings)](https://appshunter.io/ios/app/trigonometry-help/id411415648/reviews)** | [4.6 (197 ratings)](https://appshunter.io/ios/app/mike-holts-electrical-toolbox/id1406630647/reviews) |
| Number of ratings | **477** | 197 |
| Positive reviews | **90.8% of reviews** | 76.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 21 MB | 26 MB |
| Requires iOS | **10.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Armchair Engineering](https://appshunter.io/developer/398901339) | [Mike Holt Enterprises](https://appshunter.io/developer/1349960186) |

## 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


### Mike Holt's Electrical Toolbox

[App page](https://appshunter.io/ios/app/mike-holts-electrical-toolbox/id1406630647)

This app provides essential calculations for electricians, inspectors, contractors, and engineers. It helps determine conductor sizing, circuit protection, race sizing, and grounding conductor sizes for various electrical equipment and services.

**Highlights:** Conductor sizing, Voltage drop limitations, Circuit protection sizing, Race sizing, Equipment grounding conductor sizing, Dwelling-unit service calculations

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

**In-app purchases:** none

**What reviewers like**

- 👍 Great app for electricians
- 💡 Provides code article references
- 👍 Useful for on-the-spot reference
- 👍 Excellent for verifying calculations
- 👍 Helpful for exam preparation

**What reviewers complain about**

- 🐛 Emailing results not working
- 🐛 Outdated information
- 🐛 Load calc a little clunky
- 🐛 Content setup needs overhaul
- 🐛 Video series lacks completion system

**Reported bugs**

- Cannot email results
- Video player widescreen exit bug
- Previous calculation data not erased
- App content is outdated

**Requested features**

- Increase transformer capacity to 225kva
- Add option to print load calc
- Update to NEC 2020
- Add completion system for video series
- Refine user interface for better usability


## Frequently asked questions

### Is Trigonometry Help free?

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

### Is Mike Holt's Electrical Toolbox free?

Mike Holt's Electrical Toolbox is free to download, with no in-app purchases.

### Which has better reviews, Trigonometry Help or Mike Holt's Electrical Toolbox?

Trigonometry Help is rated higher. Trigonometry Help averages 4.7 out of 5 from 477 ratings, while Mike Holt's Electrical Toolbox averages 4.6 from 197 ratings.

### Do Trigonometry Help or Mike Holt's Electrical Toolbox have ads?

Neither Trigonometry Help nor Mike Holt's Electrical Toolbox shows ads.

### Which is updated more often, Trigonometry Help or Mike Holt's Electrical Toolbox?

Trigonometry Help ships an update every 13 months, and Mike Holt's Electrical Toolbox every 3 months. Most recently, Trigonometry Help was updated on September 23, 2026 and Mike Holt's Electrical Toolbox on September 21, 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.*