# Calvertr Lite vs ProCalc

The clearest difference is ads: Calvertr Lite at none against ProCalc's shown. Calvertr Lite also leads on iOS requirement (8.0 vs 13.0). ProCalc's advantage is update cadence (monthly vs every 6 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Calvertr Lite sells 3 one-off in-app purchases and ProCalc sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Calvertr Lite ships an update every 6 months, ProCalc monthly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Calvertr Lite | ProCalc |
| --- | --- | --- |
| 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 | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 34 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Intuz, Inc.](https://appshunter.io/developer/1445627232) | [Penquinzoo Limited](https://appshunter.io/developer/1551454365) |

## 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 |


### ProCalc

[App page](https://appshunter.io/ios/app/procalc-calculator-app/id6756341509)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Flat themes | $3.99 | one-time |
| Graphs and pdf export. | $3.99 | one-time |
| Unlock Neon themes | $4.99 | one-time |
| All  themes | $4.99 | one-time |


## Frequently asked questions

### Is Calvertr Lite free?

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

### Is ProCalc free?

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

### Do Calvertr Lite or ProCalc have ads?

ProCalc shows ads; Calvertr Lite does not.

### Which is updated more often, Calvertr Lite or ProCalc?

Calvertr Lite ships an update every 6 months, and ProCalc monthly. Most recently, Calvertr Lite was updated on November 1, 2026 and ProCalc 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.*