# Countdown vs OhMy Dday

The clearest difference is in-app purchases: OhMy Dday at none against Countdown's 3. OhMy Dday also leads on iOS requirement (15.0 vs 18.6). Countdown's advantage is update cadence (every 9 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Countdown sells 3 in-app purchases, starting at $0.99 per month. OhMy Dday asks for nothing beyond the download.

Countdown ships an update every 9 days, OhMy Dday every 4 months. The most recent releases landed on November 13, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Countdown | OhMy Dday |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 4 months |
| Size | 23 MB | 9 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [OFFSTUDIO](https://appshunter.io/developer/1704657022) | [soon jeong Lee](https://appshunter.io/developer/6784074372) |

## What reviewers say

### Countdown

[App page](https://appshunter.io/ios/app/countdown-d-day-and-widget/id6761094711)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium Yearly | $1.99 | per year |
| Premium Lifetime | $2.99 | one-time |


### OhMy Dday

[App page](https://appshunter.io/ios/app/ohmy-dday/id6787616026)

**In-app purchases:** none


## Frequently asked questions

### Is Countdown free?

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

### Is OhMy Dday free?

OhMy Dday is free to download, with no in-app purchases.

### Do Countdown or OhMy Dday have ads?

Both Countdown and OhMy Dday show ads.

### Which is updated more often, Countdown or OhMy Dday?

Countdown ships an update every 9 days, and OhMy Dday every 4 months. Most recently, Countdown was updated on November 13, 2026 and OhMy Dday on November 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.*