# Population Density Calculator vs SOS Morse Flash

The clearest difference is update cadence: SOS Morse Flash at daily against Population Density Calculator's weekly. Population Density Calculator's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.5). On price, ads and in-app purchases there is nothing between them.

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

Population Density Calculator ships an update weekly, SOS Morse Flash daily. The most recent releases landed on October 27, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Population Density Calculator | SOS Morse Flash |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Size | 40 MB | 5 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Stage Coding](https://appshunter.io/developer/1637068135) | [Thomas Aurange](https://appshunter.io/developer/1783985081) |

## What reviewers say

### Population Density Calculator

[App page](https://appshunter.io/ios/app/population-density-calculator/id1619680947)

**Features:** macOS Compatibility

**In-app purchases:** none


### SOS Morse Flash

[App page](https://appshunter.io/ios/app/sos-morse-flash/id6748650782)

**In-app purchases:** none


## Frequently asked questions

### Is Population Density Calculator free?

Population Density Calculator is free to download, with no in-app purchases.

### Is SOS Morse Flash free?

SOS Morse Flash is free to download, with no in-app purchases.

### Do Population Density Calculator or SOS Morse Flash have ads?

Neither Population Density Calculator nor SOS Morse Flash shows ads.

### Which is updated more often, Population Density Calculator or SOS Morse Flash?

Population Density Calculator ships an update weekly, and SOS Morse Flash daily. Most recently, Population Density Calculator was updated on October 27, 2026 and SOS Morse Flash on October 9, 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.*