# Unit Converter and Calc vs Span64 Construction Calculator

The clearest difference is in-app purchases: Unit Converter and Calc at none against Span64 Construction Calculator's 1. Unit Converter and Calc also leads on iOS requirement (15.6 vs 18.0). Span64 Construction Calculator's advantage is ads (none vs shown) and update cadence (weekly vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Span64 Construction Calculator sells 1 one-off in-app purchase. Unit Converter and Calc asks for nothing beyond the download.

Unit Converter and Calc ships an update every 2 months, Span64 Construction Calculator weekly. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Unit Converter and Calc | Span64 Construction Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/unit-converter-and-calc/id1617794152/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 31 MB | 30 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Qtonz infosoft private limited](https://appshunter.io/developer/1548474074) | [Roberto Garrido](https://appshunter.io/developer/943471024) |

## What reviewers say

### Unit Converter and Calc

[App page](https://appshunter.io/ios/app/unit-converter-and-calc/id1617794152)

This app offers a comprehensive suite of conversion tools for everyday needs, including units of length, weight, temperature, and currency. It also functions as a scientific and arithmetic calculator, with specialized calculators for age, EMI, BMI, and more.

**Highlights:** Unit conversion for length, weight, temperature, volume, time, Scientific and arithmetic calculator, Real-time currency and cryptocurrency converter, Age, EMI, BMI, Percentage, GST calculators, History display for previous calculations, Floating calculator for multitasking

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

**In-app purchases:** none


### Span64 Construction Calculator

[App page](https://appshunter.io/ios/app/span64-construction-calculator/id6789300863)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Span64 Pro | $19.99 | one-time |


## Frequently asked questions

### Is Unit Converter and Calc free?

Unit Converter and Calc is free to download, with no in-app purchases.

### Is Span64 Construction Calculator free?

Span64 Construction Calculator is free to download, with in-app purchases available.

### Do Unit Converter and Calc or Span64 Construction Calculator have ads?

Unit Converter and Calc shows ads; Span64 Construction Calculator does not.

### Which is updated more often, Unit Converter and Calc or Span64 Construction Calculator?

Unit Converter and Calc ships an update every 2 months, and Span64 Construction Calculator weekly. Most recently, Unit Converter and Calc was updated on November 6, 2026 and Span64 Construction Calculator on November 5, 2026.

---

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