# Right Angle vs KeepDue

The clearest difference is in-app purchases: KeepDue at none against Right Angle's 9. KeepDue also leads on iOS requirement (17.0 vs 26.0). On price, ads 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. KeepDue asks for nothing beyond the download.

## The numbers

| Metric | Right Angle | KeepDue |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (30 ratings)](https://appshunter.io/ios/app/right-angle/id292390648/reviews)** | — |
| Number of ratings | **30** | — |
| Positive reviews | 73.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 4 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jerry Mayers](https://appshunter.io/developer/287638654) | [岩柯 李](https://appshunter.io/developer/1549533165) |

## What reviewers say

### Right Angle

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

This app provides precise calculations for geometric shapes like triangles, trapezoids, and circles. It offers multiple angle and length formats, a custom keyboard for job site use, and helpful error messages. Designed for professionals in construction, engineering, and trades.

**Highlights:** Calculates triangles, trapezoids, and circles, Supports decimal degrees, radians, DMS, percent grade, and pitch, Handles decimal, feet/inches/fractions length formats, Custom on-screen keyboard with job site symbols, VoiceOver support for accessibility, Available in English and Spanish

**Features:** macOS Compatibility, Family Sharing, iPhone Duo support

**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


### KeepDue

[App page](https://appshunter.io/ios/app/keepdue/id6763344674)

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

**In-app purchases:** none


## Frequently asked questions

### Is Right Angle free?

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

### Is KeepDue free?

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

### Do Right Angle or KeepDue have ads?

Neither Right Angle nor KeepDue shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*