# PlasterCalculator vs Unit Conversion Calculator $

The clearest difference is in-app purchases: Unit Conversion Calculator $ at none against PlasterCalculator's 1. Unit Conversion Calculator $ also leads on iOS requirement (13.0 vs 17.6). PlasterCalculator's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 9 months). On price and device support there is nothing between them.

Both are free to download. PlasterCalculator sells 1 one-off in-app purchase. Unit Conversion Calculator $ asks for nothing beyond the download.

PlasterCalculator ships an update every 3 weeks, Unit Conversion Calculator $ every 9 months. The most recent releases landed on August 31, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | PlasterCalculator | Unit Conversion Calculator $ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 9 months |
| Size | 8 MB | 28 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Steve McCulloch](https://appshunter.io/developer/1559735681) | [JanoGroup LLC](https://appshunter.io/developer/1781461557) |

## What reviewers say

### PlasterCalculator

[App page](https://appshunter.io/ios/app/plastercalculator/id1559735679)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation | $0.99 | one-time |


### Unit Conversion Calculator $

[App page](https://appshunter.io/ios/app/unit-conversion-calculator/id6742060456)

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

**In-app purchases:** none


## Frequently asked questions

### Is PlasterCalculator free?

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

### Is Unit Conversion Calculator $ free?

Unit Conversion Calculator $ is free to download, with no in-app purchases.

### Do PlasterCalculator or Unit Conversion Calculator $ have ads?

Unit Conversion Calculator $ shows ads; PlasterCalculator does not.

### Which is updated more often, PlasterCalculator or Unit Conversion Calculator $?

PlasterCalculator ships an update every 3 weeks, and Unit Conversion Calculator $ every 9 months. Most recently, PlasterCalculator was updated on August 31, 2026 and Unit Conversion Calculator $ on September 12, 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.*