# Smart Countdown PRO vs D

The clearest difference is in-app purchases: D at none against Smart Countdown PRO's 2. Smart Countdown PRO's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Smart Countdown PRO sells 2 in-app purchases, starting at $2.49 per month. D asks for nothing beyond the download.

Smart Countdown PRO ships an update every 5 weeks, D every 2 months. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Smart Countdown PRO | D |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | — | Ad-supported |
| Size | 15 MB | 28 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Vijay Jasoliya](https://appshunter.io/developer/1690525119) | [SiU Ahn](https://appshunter.io/developer/1601025745) |

## What reviewers say

### Smart Countdown PRO

[App page](https://appshunter.io/ios/app/smart-countdown-pro/id6745555181)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MonthlySubscription | $2.49 | per month |
| YearlySubscription | $21.00 | per year |


### D

[App page](https://appshunter.io/ios/app/d-day-counter-countdowns/id6787755137)

Organize all your important dates, from exams and anniversaries to birthdays and deadlines. Track upcoming events with customizable countdowns and view them on your home screen or calendar. Stay motivated with progress tracking and enjoy a private, offline experience.

**Highlights:** Unlimited D-day creation, Customizable categories, Yearly repeating event support, Home screen widgets, Calendar view, Statistics and progress rings, Offline and private usage

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Countdown PRO free?

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

### Is D free?

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

### Do Smart Countdown PRO or D have ads?

D shows ads; Smart Countdown PRO does not.

### Which is updated more often, Smart Countdown PRO or D?

Smart Countdown PRO ships an update every 5 weeks, and D every 2 months. Most recently, Smart Countdown PRO was updated on October 28, 2026 and D on October 31, 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.*