# D vs EventDay

The clearest difference is update cadence: EventDay at every 3 days against D's every 3 months. EventDay also leads on iOS requirement (12.0 vs 15.0). On price, ads, 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.

D ships an update every 3 months, EventDay every 3 days. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | D | EventDay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/d-day-counter/id906689489/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 6 MB | 34 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EONSOFT](https://appshunter.io/developer/899851112) | [SuWon Choi](https://appshunter.io/developer/1452191072) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-day-counter/id906689489)

Easily track important dates and countdown to significant events. This app helps you remember anniversaries, birthdays, and other milestones by calculating the remaining days. Never forget a special occasion again with this simple countdown tool.

**Highlights:** Countdown to special dates, Anniversary tracking, Birthday reminders, Event countdowns, Simple interface

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

**In-app purchases:** none


### EventDay

[App page](https://appshunter.io/ios/app/eventday/id1614206360)

**In-app purchases:** none


## Frequently asked questions

### Is D free?

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

### Is EventDay free?

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

### Do D or EventDay have ads?

Both D and EventDay show ads.

### Which is updated more often, D or EventDay?

D ships an update every 3 months, and EventDay every 3 days. Most recently, D was updated on November 1, 2026 and EventDay on November 3, 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.*