Trigonometry Help vs Mike Holt's Electrical Toolbox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Trigonometry Help
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.
- Solve right-angled triangles
- Workings view for solutions
- Scale drawing of solved triangle
- Basic trig formulae reference
- Multiple angle input formats
- Customizable decimal places
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Trig Help is a simple triangle calculator that enables you to quickly and easily find unknown angles & sides of any right-angled triangle. Features Include: - Accurately solve right-angled triangles - Workings view, so you can see the math behind the solutions (requires optional upgrade) - View a scale drawing of your solved triangle - View a handy set of basic trig formulae - Enter angles in radians, decimal degrees or degrees, minutes, seconds - Select your preferred number of decimal places What two App Store reviewers had to say about Trig Help: "I could never remember those simple formulas. I always had to dig out my text books from MANY YEARS ago to refresh my memory. THIS LITTLE APP IS A DELIGHT TO USE! I love it! Even my engineer friends are impressed. THANKS!" 5 Stars "Easy to use and accurate with high degree of precision. Would recommend to any toolmaker." 5 Stars Also available for OS X on the Mac App Store.
Mike Holt's Electrical Toolbox
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.
- Conductor sizing
- Voltage drop limitations
- Circuit protection sizing
- Race sizing
- Equipment grounding conductor sizing
- Dwelling-unit service calculations
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Mike Holt, the industry leader in the electrical industry (MikeHolt.com) has created an amazing, practical and useful app for the electrician, inspector, instructor, contractor and engineer. The app contains conductor sizing (including voltage drop limitations), circuit protection sizing, race sizing, equipment grounding conductor sizing for electric heating equipment (commercial and Residential), air-conditioning equipment (commercial and Residential), motors (commercial and Residential), Transformers (commercial) , and dwelling-unit service calculations and sizing.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Trigonometry Help | Mike Holt's Electrical Toolbox |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.7 (477 ratings) — better | 4.6 (197 ratings) |
| Positive reviews | 90.8% of reviews — better | 76.7% of reviews |
| Number of ratings | 477 — better | 197 |
| Update frequency | Every 13 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 21 MB | 26 MB |
| Age rating | +4 | 4+ |
| Developer | Armchair Engineering | Mike Holt Enterprises |
Customer experience
Trigonometry Help
Mike Holt's Electrical Toolbox
User reviews
Trigonometry Help
From 477 App Store ratingsWhat we love
- 🚀 Quick and easy to use
- 👍 User-friendly interface
- 🔧 Helpful for tradesmen and professionals
- ⚙️ Accurate calculations
- 🔍 Convenient for on-site use
Room to improve
- 🔢 Limited to right-angled triangles only
- 🔍 Lacks advanced trig functions
- 🔀 No option to rotate/flip the triangle view
Mike Holt's Electrical Toolbox
From 197 App Store ratingsWhat we love
- 👍 Great app for electricians
- 💡 Provides code article references
- 👍 Useful for on-the-spot reference
- 👍 Excellent for verifying calculations
- 👍 Helpful for exam preparation
Room to improve
- 🐛 Emailing results not working
- 🐛 Outdated information
- 🐛 Load calc a little clunky
- 🐛 Content setup needs overhaul
- 🐛 Video series lacks completion system
Bugs and requests
Trigonometry Help
Reported bugs
2 issues- Inconsistent performance on older devices
- Occasional crashes or freezes
Requested features
3 requests- 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
Reported bugs
4 issues- Cannot email results
- Video player widescreen exit bug
- Previous calculation data not erased
- App content is outdated
Requested features
6 requests- 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
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- Add more features, willing to pay extra
In-app purchases
Trigonometry Help
- Trig Help Premium$0.99
- Trig Help Premium$1.99
- Trig Help Premium$3.99
Mike Holt's Electrical Toolbox
No in-app purchases
Questions
Is Trigonometry Help free?
Is Mike Holt's Electrical Toolbox free?
Which has better reviews, Trigonometry Help or Mike Holt's Electrical Toolbox?
Do Trigonometry Help or Mike Holt's Electrical Toolbox have ads?
Which is updated more often, Trigonometry Help or Mike Holt's Electrical Toolbox?
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