# Calc Pro vs SimpleUnit Lite

The clearest difference is update cadence: SimpleUnit Lite at every 5 days against Calc Pro's monthly. SimpleUnit Lite also leads on iOS requirement (16.0 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calc Pro ships an update monthly, SimpleUnit Lite every 5 days. The most recent releases landed on September 21, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Calc Pro | SimpleUnit Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/calc-pro-simple-and-useful/id1444681142/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | — |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Ad-supported | — |
| Size | 8 MB | 7 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Keita Nonaka](https://appshunter.io/developer/1252557006) | [Nickolas Johnson](https://appshunter.io/developer/1710993762) |

## What reviewers say

### Calc Pro

[App page](https://appshunter.io/ios/app/calc-pro-simple-and-useful/id1444681142)

This powerful calculator handles complex equations and huge numbers with up to 15 digits of precision. It saves your calculation history, allowing you to reuse previous equations and answers. Access scientific functions like square root and logarithms easily with a swipe.

**Highlights:** Complex calculations, Huge number handling, Calculation history, Scientific functions, Dark Mode, Copy answer

**Features:** macOS Compatibility

**In-app purchases:** none


### SimpleUnit Lite

[App page](https://appshunter.io/ios/app/simpleunit-lite/id6470175430)

**In-app purchases:** none


## Frequently asked questions

### Is Calc Pro free?

Calc Pro is free to download, with no in-app purchases.

### Is SimpleUnit Lite free?

SimpleUnit Lite is free to download, with no in-app purchases.

### Which is updated more often, Calc Pro or SimpleUnit Lite?

Calc Pro ships an update monthly, and SimpleUnit Lite every 5 days. Most recently, Calc Pro was updated on September 21, 2026 and SimpleUnit Lite on September 11, 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.*