# BuildCalc vs Trig Solver

The clearest difference is price: Trig Solver at Free against BuildCalc's $24.99. Trig Solver also leads on iOS requirement (9.0 vs 17.0). BuildCalc's advantage is update cadence (every 3 weeks vs every 28 months) and rating (4.7 vs 4.3). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Trig Solver is free to download; BuildCalc costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BuildCalc holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 71 and 78 respectively. Written reviews point the same way: 87% of BuildCalc's written reviews are positive against 74% of Trig Solver's.

BuildCalc ships an update every 3 weeks, Trig Solver every 28 months. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | BuildCalc | Trig Solver |
| --- | --- | --- |
| Price | $24.99 | **Free** |
| Rating | **[4.7 (71 ratings)](https://appshunter.io/ios/app/buildcalc/id333369423/reviews)** | [4.3 (78 ratings)](https://appshunter.io/ios/app/trig-solver/id398450227/reviews) |
| Number of ratings | 71 | **78** |
| Positive reviews | **87.4% of reviews** | 74.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 28 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#68** | — |
| Size | 15 MB | 8 MB |
| Requires iOS | 17.0 | **9.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [42nd Parallel](https://appshunter.io/developer/333369426) | [Creature Code Mobile, LLC](https://appshunter.io/developer/386736750) |

## What reviewers say

### BuildCalc

[App page](https://appshunter.io/ios/app/buildcalc/id333369423)

**Currently charting:** #68 Top Paid · Utilities (US App Store)

This app enhances traditional construction calculators with advanced functions for layout, material estimation, and complex calculations. It offers interactive features, customizable material sizes, and streamlined results presentation to reduce complexity and improve accuracy for professionals.

**Highlights:** Advanced baluster and stair layout, Fence post and material estimation, Interactive calculation adjustments, Customizable material sizes, Miter saw vs. protractor rafter calculations, Streamlined results display and saving

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

**In-app purchases:** none


### Trig Solver

[App page](https://appshunter.io/ios/app/trig-solver/id398450227)

This application calculates unknown sides and angles of both regular and right triangles. It supports various input combinations, including two sides and an angle, two angles and a side, three sides, or two sides and an angle for right triangles.

**Highlights:** Regular triangle solver, Right triangle solver, Calculate with 2 sides and an angle, Calculate with 2 angles and a side, Calculate with 3 sides, Calculate with side and angle (right triangle)

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Fast calculations
- ✅ Accurate results (for many users)
- 💡 Useful for schoolwork
- 🛠️ Great for job site/machinists

**What reviewers complain about**

- 🐛 Inaccurate results reported
- 💸 Ads are present and distracting
- 📉 Rounding issues
- 🚫 No option to remove ads (for some)
- ⚠️ App stopped working after updates

**Reported bugs**

- Calculator rounds to '7' and '0'
- Regular triangle calculations not correct
- Answers in the wrong place (angles reversed)
- App doesn't work anymore after update
- Can't see input in dark mode

**Requested features**

- Rotate the triangle
- Show the work/steps
- Add square root functionality
- Option to pay to remove ads
- Modify single value without reset


## Frequently asked questions

### Is BuildCalc free?

BuildCalc costs $24.99, with no in-app purchases.

### Is Trig Solver free?

Trig Solver is free to download, with no in-app purchases.

### Which has better reviews, BuildCalc or Trig Solver?

BuildCalc is rated higher. BuildCalc averages 4.7 out of 5 from 71 ratings, while Trig Solver averages 4.3 from 78 ratings.

### Do BuildCalc or Trig Solver have ads?

Neither BuildCalc nor Trig Solver shows ads.

### Which is updated more often, BuildCalc or Trig Solver?

BuildCalc ships an update every 3 weeks, and Trig Solver every 28 months. Most recently, BuildCalc was updated on September 23, 2026 and Trig Solver on September 22, 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.*