# Smooth Countdown vs Binary Clock

The clearest difference is price: Binary Clock at Free against Smooth Countdown's $0.99. Binary Clock also leads on update cadence (daily vs every 21 months). Smooth Countdown's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 26.0). On ads and device support there is nothing between them.

Binary Clock is free to download; Smooth Countdown costs $0.99 up front. Binary Clock sells 1 one-off in-app purchase. Smooth Countdown asks for nothing beyond the download.

Smooth Countdown ships an update every 21 months, Binary Clock daily. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Smooth Countdown | Binary Clock |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Daily** |
| Size | 1 MB | 7 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [Super, Inc.](https://appshunter.io/developer/439129974) |

## What reviewers say

### Smooth Countdown

[App page](https://appshunter.io/ios/app/smooth-countdown/id485337187)

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

**In-app purchases:** none


### Binary Clock

[App page](https://appshunter.io/ios/app/binary-clock-standby/id6786876264)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Binary Clock Pro | $2.99 | one-time |


## Frequently asked questions

### Is Smooth Countdown free?

Smooth Countdown costs $0.99, with no in-app purchases.

### Is Binary Clock free?

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

### Do Smooth Countdown or Binary Clock have ads?

Neither Smooth Countdown nor Binary Clock shows ads.

### Which is updated more often, Smooth Countdown or Binary Clock?

Smooth Countdown ships an update every 21 months, and Binary Clock daily. Most recently, Smooth Countdown was updated on October 4, 2026 and Binary Clock 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.*