# Lector COVID vs Simple square root calculator

The clearest difference is ads: Lector COVID at none against Simple square root calculator's shown. Simple square root calculator's advantage is update cadence (every 11 months vs every 39 months) and iOS requirement (12.0 vs 26.0). 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.

Lector COVID ships an update every 39 months, Simple square root calculator every 11 months. The most recent releases landed on September 29, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Lector COVID | Simple square root calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (19 ratings)](https://appshunter.io/ios/app/simple-square-root-calculator/id6449826901/reviews)** |
| Number of ratings | — | **19** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 39 months | **Every 11 months** |
| Monetization | — | Ad-supported |
| Size | 2 MB | 39 MB |
| Requires iOS | 26.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Editorial Enseñanza S.A. de C.V.](https://appshunter.io/developer/1500615431) | [MINERVA K.K.](https://appshunter.io/developer/1597905460) |

## What reviewers say

### Lector COVID

[App page](https://appshunter.io/ios/app/lector-covid/id6444872858)

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple square root calculator

[App page](https://appshunter.io/ios/app/simple-square-root-calculator/id6449826901)

Easily calculate square roots and powers with this intuitive tool. It handles complex calculations, including those with parentheses, providing accurate results for everyday use, learning, and research.

**Highlights:** Square root calculation, Computing powers, Calculations with parentheses, Simple and intuitive interface, High accuracy results, Everyday use calculations

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

**In-app purchases:** none


## Frequently asked questions

### Is Lector COVID free?

Lector COVID is free to download, with no in-app purchases.

### Is Simple square root calculator free?

Simple square root calculator is free to download, with no in-app purchases.

### Do Lector COVID or Simple square root calculator have ads?

Simple square root calculator shows ads; Lector COVID does not.

### Which is updated more often, Lector COVID or Simple square root calculator?

Lector COVID ships an update every 39 months, and Simple square root calculator every 11 months. Most recently, Lector COVID was updated on September 29, 2026 and Simple square root calculator on October 18, 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.*