# Calvertr Lite vs USA Unit Converter

The clearest difference is in-app purchases: USA Unit Converter at none against Calvertr Lite's 3. Calvertr Lite's advantage is update cadence (every 6 months vs every 14 months) and iOS requirement (8.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Calvertr Lite sells 3 one-off in-app purchases. USA Unit Converter asks for nothing beyond the download.

Calvertr Lite ships an update every 6 months, USA Unit Converter every 14 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Calvertr Lite | USA Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (10 ratings)](https://appshunter.io/ios/app/calvertr-lite/id938033085/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 14 months |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 2 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Intuz, Inc.](https://appshunter.io/developer/1445627232) | [Andrey Seleznev](https://appshunter.io/developer/1665252540) |

## What reviewers say

### Calvertr Lite

[App page](https://appshunter.io/ios/app/calvertr-lite/id938033085)

This free utility app offers a powerful unit converter and calculator with a sleek design. It features thousands of conversions across 34 categories, currency conversion, and a versatile calculator with live math expressions. Personalize your experience with custom themes and save/share your work.

**Highlights:** 34 unit conversion categories, 157 world currency support, Live math expression calculator, Customizable background themes, Save and share conversions/calculations, Notification center widget calculator

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Unlock All Themes | $0.99 | one-time |
| Currency Conversion | $0.99 | one-time |


### USA Unit Converter

[App page](https://appshunter.io/ios/app/usa-unit-converter/id1669915305)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calvertr Lite free?

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

### Is USA Unit Converter free?

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

### Do Calvertr Lite or USA Unit Converter have ads?

Neither Calvertr Lite nor USA Unit Converter shows ads.

### Which is updated more often, Calvertr Lite or USA Unit Converter?

Calvertr Lite ships an update every 6 months, and USA Unit Converter every 14 months. Most recently, Calvertr Lite was updated on November 1, 2026 and USA Unit Converter on November 3, 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.*