# Unit Converter and Calc vs Calc ± Smart Widgets

The clearest difference is in-app purchases: Unit Converter and Calc at none against Calc ± Smart Widgets's 2. Unit Converter and Calc also leads on iOS requirement (15.6 vs 17.0). Calc ± Smart Widgets's advantage is ads (none vs shown) and update cadence (daily vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Calc ± Smart Widgets sells 2 in-app purchases, starting at $1.99 per month. Unit Converter and Calc asks for nothing beyond the download.

Unit Converter and Calc ships an update every 2 months, Calc ± Smart Widgets daily. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Unit Converter and Calc | Calc ± Smart Widgets |
| --- | --- | --- |
| 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 | **Daily** |
| Monetization | Ad-supported | — |
| Size | 31 MB | 55 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [Qtonz infosoft private limited](https://appshunter.io/developer/1548474074) | [HKinfoway Technologies](https://appshunter.io/developer/1498599856) |

## 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


### Calc ± Smart Widgets

[App page](https://appshunter.io/ios/app/calc-smart-widgets/id6745335333)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calc ± Pro Monthly | $1.99 | per month |
| Calc ± Pro Yearly | $12.99 | per year |


## Frequently asked questions

### Is Unit Converter and Calc free?

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

### Is Calc ± Smart Widgets free?

Calc ± Smart Widgets is free to download, with in-app purchases available.

### Do Unit Converter and Calc or Calc ± Smart Widgets have ads?

Unit Converter and Calc shows ads; Calc ± Smart Widgets does not.

### Which is updated more often, Unit Converter and Calc or Calc ± Smart Widgets?

Unit Converter and Calc ships an update every 2 months, and Calc ± Smart Widgets daily. Most recently, Unit Converter and Calc was updated on October 24, 2026 and Calc ± Smart Widgets on October 30, 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.*