# Countdown until Anniversary vs SOS Morse Flash

The clearest difference is ads: SOS Morse Flash at none against Countdown until Anniversary's shown. SOS Morse Flash also leads on update cadence (daily vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Countdown until Anniversary ships an update every 4 months, SOS Morse Flash daily. The most recent releases landed on October 20, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Countdown until Anniversary | SOS Morse Flash |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Daily** |
| Size | 18 MB | 5 MB |
| Requires iOS | **17.6** | 18.5 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Aaron F Stephenson](https://appshunter.io/developer/391222344) | [Thomas Aurange](https://appshunter.io/developer/1783985081) |

## What reviewers say

### Countdown until Anniversary

[App page](https://appshunter.io/ios/app/countdown-until-anniversary/id6738866365)

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

**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 Countdown until Anniversary free?

Countdown until Anniversary 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 Countdown until Anniversary or SOS Morse Flash have ads?

Countdown until Anniversary shows ads; SOS Morse Flash does not.

### Which is updated more often, Countdown until Anniversary or SOS Morse Flash?

Countdown until Anniversary ships an update every 4 months, and SOS Morse Flash daily. Most recently, Countdown until Anniversary was updated on October 20, 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.*