# Slope Calculator & Tools vs Protractor

The clearest difference is ads: Protractor at none against Slope Calculator & Tools's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Slope Calculator & Tools sells 1 one-off in-app purchase and Protractor sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Slope Calculator & Tools ships an update every 2 months, Protractor every 6 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Slope Calculator & Tools | Protractor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/slope-calculator-and-tools/id6767999229/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 5 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Do Tri](https://appshunter.io/developer/846531282) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### Slope Calculator & Tools

[App page](https://appshunter.io/ios/app/slope-calculator-and-tools/id6767999229)

This professional construction calculator assists with precise measurements for slopes, roof pitches, stairs, ramps, and grading. It offers instant calculations with live diagrams and supports both imperial and metric units for various construction and DIY projects.

**Highlights:** Slope calculation with live diagrams, Roof pitch and area calculation, Stair planning and comfort analysis, ADA ramp compliance checks, Grade and triangle solving, Unit and feet-inch conversion, Cut & fill volume estimation, Save and organize projects

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $5.99 | one-time |


### Protractor

[App page](https://appshunter.io/ios/app/protractor-angle-finder/id6772273661)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Incline Gauge Weekly | $4.99 | per 7 days |
| Roof Pitch Yearly | $24.99 | per year |
| Bevel & Degree, Pay Once | $49.99 | one-time |


## Frequently asked questions

### Is Slope Calculator & Tools free?

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

### Is Protractor free?

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

### Do Slope Calculator & Tools or Protractor have ads?

Slope Calculator & Tools shows ads; Protractor does not.

### Which is updated more often, Slope Calculator & Tools or Protractor?

Slope Calculator & Tools ships an update every 2 months, and Protractor every 6 weeks. Most recently, Slope Calculator & Tools was updated on October 31, 2026 and Protractor on October 31, 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.*