# Big Day Countdown vs OhMyDueDate

The clearest difference is in-app purchases: OhMyDueDate at none against Big Day Countdown's 3. OhMyDueDate also leads on update cadence (fortnightly vs every 3 months). Big Day Countdown's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Big Day Countdown sells 3 in-app purchases, starting at $3.99 per month. OhMyDueDate asks for nothing beyond the download.

Big Day Countdown ships an update every 3 months, OhMyDueDate fortnightly. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Big Day Countdown | OhMyDueDate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/big-day-countdown-widget/id6471045592/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Freemium | — |
| Size | 137 MB | 24 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Reena Williams](https://appshunter.io/developer/1708538764) | [Kaoru Tsukamoto](https://appshunter.io/developer/1866927358) |

## What reviewers say

### Big Day Countdown

[App page](https://appshunter.io/ios/app/big-day-countdown-widget/id6471045592)

Easily track important dates and hours with customizable widgets and reminders. Schedule alerts for birthdays, deadlines, and more, and visualize time remaining in hours, minutes, and seconds. Organize events into categories and personalize their appearance to stay on top of every significant moment.

**Highlights:** Interactive Home Screen Widgets, Customizable Alerts, Hour Tracker, Event Categorization, Personalized Appearance, Shareable Countdowns

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.99 | per month |
| Yearly Subscriptions | $12.99 | per year |
| Purchase Premium | $0.99 | one-time |


### OhMyDueDate

[App page](https://appshunter.io/ios/app/ohmyduedate/id6757434832)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Big Day Countdown free?

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

### Is OhMyDueDate free?

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

### Do Big Day Countdown or OhMyDueDate have ads?

OhMyDueDate shows ads; Big Day Countdown does not.

### Which is updated more often, Big Day Countdown or OhMyDueDate?

Big Day Countdown ships an update every 3 months, and OhMyDueDate fortnightly. Most recently, Big Day Countdown was updated on October 9, 2026 and OhMyDueDate on October 7, 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.*