# Trig Solver vs Slope Calculator

The clearest difference is in-app purchases: Trig Solver at none against Slope Calculator's 1. Trig Solver also leads on review sentiment (74% vs 58%) and iOS requirement (9.0 vs 13.0). On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.3 for Trig Solver against 4.3 for Slope Calculator. Both are backed by a comparable volume of ratings — 78 and 104 respectively. Written reviews are what separate them: 74% of Trig Solver's written reviews are positive against 58% of Slope Calculator's.

Trig Solver ships an update every 28 months, Slope Calculator every 14 months. The most recent releases landed on September 22, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Trig Solver | Slope Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (78 ratings)](https://appshunter.io/ios/app/trig-solver/id398450227/reviews) | [4.3 (104 ratings)](https://appshunter.io/ios/app/slope-calculator-calc/id1561129699/reviews) |
| Number of ratings | 78 | **104** |
| Positive reviews | **74.1% of reviews** | 58.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 14 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 5 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Creature Code Mobile, LLC](https://appshunter.io/developer/386736750) | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) |

## 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


### Slope Calculator

[App page](https://appshunter.io/ios/app/slope-calculator-calc/id1561129699)

Calculate slope in angle, percentage, or ratio by inputting two sides of a right triangle. This intuitive and easy-to-use application provides the remaining necessary values.

**Highlights:** Calculate slope as angle, Calculate slope as percentage, Calculate slope as ratio, Input two sides of a right triangle, Calculate remaining triangle values, Intuitive and easy to use

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


## Frequently asked questions

### Is Trig Solver free?

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

### Is Slope Calculator free?

Slope Calculator is free to download, with in-app purchases available.

### Which has better reviews, Trig Solver or Slope Calculator?

Trig Solver and Slope Calculator are both rated 4.3 out of 5 on the App Store, from 78 and 104 ratings respectively.

### Do Trig Solver or Slope Calculator have ads?

Neither Trig Solver nor Slope Calculator shows ads.

### Which is updated more often, Trig Solver or Slope Calculator?

Trig Solver ships an update every 28 months, and Slope Calculator every 14 months. Most recently, Trig Solver was updated on September 22, 2026 and Slope Calculator on September 16, 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.*