# Trig Solver vs Arc+

The clearest difference is in-app purchases: Trig Solver at none against Arc+'s 1. Trig Solver also leads on review sentiment (74% vs 50%) and iOS requirement (9.0 vs 15.6). Arc+'s advantage is update cadence (every 4 months vs every 28 months) and rating (4.6 vs 4.3). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. Arc+ sells 1 one-off in-app purchase. Trig Solver asks for nothing beyond the download.

Arc+ holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 78 and 113 respectively. Written reviews complicate that: 74% of Trig Solver's written reviews are positive against 50% of Arc+'s, so the app with the better star average is not the one people write more warmly about.

Trig Solver ships an update every 28 months, Arc+ every 4 months. Both last shipped on September 22, 2026.

## The numbers

| Metric | Trig Solver | Arc+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (78 ratings)](https://appshunter.io/ios/app/trig-solver/id398450227/reviews) | **[4.6 (113 ratings)](https://appshunter.io/ios/app/arc-plus/id1464058503/reviews)** |
| Number of ratings | 78 | **113** |
| Positive reviews | **74.1% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 8 MB | 4 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Creature Code Mobile, LLC](https://appshunter.io/developer/386736750) | [Mohamed Saad](https://appshunter.io/developer/1291109619) |

## What reviewers say

### 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


### Arc+

[App page](https://appshunter.io/ios/app/arc-plus/id1464058503)

This utility app helps users calculate various dimensions of circular arcs, including radius, length, width, and height. It offers a simple interface where users input two known values to derive the rest. Additional features include a unit converter, result saving, and sharing capabilities.

**Highlights:** Calculate Radius, Length, Width, Height, Tangent, Input two known values to find others, Measurement units converter, Save results to favorites, Share calculations

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Blocker | $4.99 | one-time |


## Frequently asked questions

### Is Trig Solver free?

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

### Is Arc+ free?

Arc+ is free to download, with in-app purchases available.

### Which has better reviews, Trig Solver or Arc+?

Arc+ is rated higher. Trig Solver averages 4.3 out of 5 from 78 ratings, while Arc+ averages 4.6 from 113 ratings.

### Do Trig Solver or Arc+ have ads?

Neither Trig Solver nor Arc+ shows ads.

### Which is updated more often, Trig Solver or Arc+?

Trig Solver ships an update every 28 months, and Arc+ every 4 months. Most recently, Trig Solver was updated on September 22, 2026 and Arc+ 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.*