# iGPSGIS II vs Conversion Calculator Units

The clearest difference is price: Conversion Calculator Units at Free against iGPSGIS II's $44.99. Conversion Calculator Units also leads on ratings volume (5K vs 3) and update cadence (every 2 months vs every 7 months). iGPSGIS II's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Conversion Calculator Units is free to download; iGPSGIS II costs $44.99 up front. Conversion Calculator Units sells 1 one-off in-app purchase. iGPSGIS II asks for nothing beyond the download.

iGPSGIS II holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Conversion Calculator Units has 5K ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 67% of iGPSGIS II's written reviews are positive against 82% of Conversion Calculator Units's, so the app with the better star average is not the one people write more warmly about.

iGPSGIS II ships an update every 7 months, Conversion Calculator Units every 2 months. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | iGPSGIS II | Conversion Calculator Units |
| --- | --- | --- |
| Price | $44.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/igpsgis-ii/id519856107/reviews)** | [4.7 (5K ratings)](https://appshunter.io/ios/app/conversion-calculator-units/id727632233/reviews) |
| Number of ratings | 3 | **5K** |
| Positive reviews | 66.7% of reviews | **82.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 9 MB | 41 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CORVALLIS MICROTECHNOLOGY, INC.](https://appshunter.io/developer/409254105) | [RV AppStudios LLC](https://appshunter.io/developer/340181308) |

## What reviewers say

### iGPSGIS II

[App page](https://appshunter.io/ios/app/igpsgis-ii/id519856107)

Record GPS points, lines, and areas with descriptions. Digitize features on a background map or create points using angles and distances. Organize data in topic layers and easily import/export shapefiles. Ideal for field data collection and productivity in various professional applications.

**Highlights:** Record Points, Lines, and Areas, Digitize Features on Background Map, Create Points by Angle/Distance, View Distances and Areas, Organize Data in Topic Layers, Import/Export Shapefiles, Cloud Storage and FTP/Email Transfer

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

**In-app purchases:** none


### Conversion Calculator Units

[App page](https://appshunter.io/ios/app/conversion-calculator-units/id727632233)

This app offers a simple and powerful way to convert between over 140 units across 12 categories. Easily switch between units, customize your experience with themes, and share your results.

**Highlights:** Converts over 140 units, Supports 12 conversion categories, Customizable themes, Drag and set unit positions, Add units to favorites, Share converted units via email

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

**In-app purchases (1)**

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

**What reviewers like**

- 👍 User-friendly
- 🚀 Easy to use
- 💡 Helpful for learning metric system
- 👍 Great for conversions
- 👍 Intuitive interface

**What reviewers complain about**

- 🐛 Ads disrupt usage
- 🐛 Difficult to change units
- 🐛 Lacks portrait mode
- 🐛 Upside-down orientation issues
- 🐛 Cluttered UI design

**Reported bugs**

- Ads not removed after purchase
- Incorrect unit conversions

**Requested features**

- Add pressure conversion units
- Include a basic calculator function
- Implement multi-language support
- Allow customization of unit order


## Frequently asked questions

### Is iGPSGIS II free?

iGPSGIS II costs $44.99, with no in-app purchases.

### Is Conversion Calculator Units free?

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

### Which has better reviews, iGPSGIS II or Conversion Calculator Units?

iGPSGIS II is rated higher. iGPSGIS II averages 5.0 out of 5 from 3 ratings, while Conversion Calculator Units averages 4.7 from 5K ratings.

### Do iGPSGIS II or Conversion Calculator Units have ads?

Conversion Calculator Units shows ads; iGPSGIS II does not.

### Which is updated more often, iGPSGIS II or Conversion Calculator Units?

iGPSGIS II ships an update every 7 months, and Conversion Calculator Units every 2 months. Most recently, iGPSGIS II was updated on October 26, 2026 and Conversion Calculator Units on October 28, 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.*