# Right Angle vs Thread Calculator

The clearest difference is review sentiment: Right Angle at 73% against Thread Calculator's 33%. Right Angle also leads on ads (none vs shown) and update cadence (every 5 days vs every 18 months). Thread Calculator's advantage is in-app purchases (none vs 9) and rating (4.3 vs 3.9). On price, ratings volume and device support there is nothing between them.

Both are free to download. Right Angle sells 9 in-app purchases, starting at $2.99 per month. Thread Calculator asks for nothing beyond the download.

Thread Calculator holds the better App Store score, 4.3 against 3.9. Both are backed by a comparable volume of ratings — 30 and 13 respectively. Written reviews complicate that: 73% of Right Angle's written reviews are positive against 33% of Thread Calculator's, so the app with the better star average is not the one people write more warmly about.

Right Angle ships an update every 5 days, Thread Calculator every 18 months. The most recent releases landed on October 11, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Right Angle | Thread Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (30 ratings)](https://appshunter.io/ios/app/right-angle/id292390648/reviews) | **[4.3 (13 ratings)](https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews)** |
| Number of ratings | **30** | 13 |
| Positive reviews | **73.3% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 18 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 2 MB | 25 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jerry Mayers](https://appshunter.io/developer/287638654) | [GSR Gustav Stursberg GmbH](https://appshunter.io/developer/1559560292) |

## What reviewers say

### Right Angle

[App page](https://appshunter.io/ios/app/right-angle/id292390648)

This app calculates triangles and segments of circles. It supports various angle input formats and offers solutions for oblique triangles and circle segments with optional add-ons. A right triangle calculator is included for free.

**Highlights:** Triangle solver, Circle segment calculator, Multiple angle units (degrees, radians, DMS, grade, x/12), Oblique triangle solver (add-on), Circle segment solver (add-on), Free right triangle calculator

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Renews Monthly | $2.99 | per month |
| Renews Yearly | $14.99 | per year |
| Small Tip | $2.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Segments Calculator | $5.99 | one-time |
| Oblique Triangle Calculator | $5.99 | one-time |
| Segment & Oblique Triangle | $6.99 | one-time |
| Large Tip | $9.99 | one-time |
| Huge Tip | $29.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Saves time
- 🛠️ Useful for construction/trades
- 📐 Accurate calculations
- 💡 Unique functionality (historically)

**What reviewers complain about**

- 🐛 Recent updates removed key features
- 🐛 In-app purchases required for previously free features
- 🐛 Loss of purchase after update
- 🐛 App now requires payment for features
- 🐛 Misleading free app description

**Reported bugs**

- App crashes after startup
- Update caused app to crash
- Loss of previously purchased unlocked app
- Keyboard covers input fields
- App changes mm to unspecified units

**Requested features**

- Restore fraction support
- Restore feet and inches support
- Provide both angles of a right triangle
- Allow scrolling or hiding the keyboard
- Bundling with other tools


### Thread Calculator

[App page](https://appshunter.io/ios/app/thread-calculator/id1559560290)

This app provides a quick and easy way to calculate thread dimensions for various units, including tap hole sizes and bolt specifications. It helps metalworkers find precise measurements for internal and external threads without consulting tables.

**Highlights:** Thread cutting calculator for multiple units, Cold forming calculator, Thread repair calculator, Tap hole and bolt diameter calculation, Saves time compared to tables

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Right Angle free?

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

### Is Thread Calculator free?

Thread Calculator is free to download, with no in-app purchases.

### Which has better reviews, Right Angle or Thread Calculator?

Thread Calculator is rated higher. Right Angle averages 3.9 out of 5 from 30 ratings, while Thread Calculator averages 4.3 from 13 ratings.

### Do Right Angle or Thread Calculator have ads?

Thread Calculator shows ads; Right Angle does not.

### Which is updated more often, Right Angle or Thread Calculator?

Right Angle ships an update every 5 days, and Thread Calculator every 18 months. Most recently, Right Angle was updated on October 11, 2026 and Thread Calculator on September 27, 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.*