# zero vs Countdown Pro

The clearest difference is in-app purchases: zero at none against Countdown Pro's 1. zero also leads on iOS requirement (13.4 vs 18.6). Countdown Pro's advantage is update cadence (every 4 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Countdown Pro sells 1 one-off in-app purchase. zero asks for nothing beyond the download.

zero ships an update every 4 months, Countdown Pro every 4 days. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | zero | Countdown Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.6 (5 ratings)](https://appshunter.io/ios/app/countdown-pro-widget-and-timer/id6755376859/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 81.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 34 MB | 42 MB |
| Requires iOS | **13.4** | 18.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Cole Stites-Clayton](https://appshunter.io/developer/1734279918) | [Rich Soft Co., Ltd](https://appshunter.io/developer/1499019813) |

## What reviewers say

### zero

[App page](https://appshunter.io/ios/app/zero-carbon-agent/id6478878756)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Countdown Pro

[App page](https://appshunter.io/ios/app/countdown-pro-widget-and-timer/id6755376859)

Track important upcoming and past events with customizable countdowns. Monitor days remaining or elapsed for birthdays, holidays, goals, and more. Organize your dates with tags and filters, and view them on your home screen.

**Highlights:** Unlimited countdowns, Days-left and days-since tracking, Emoji, photo, and color customization, Home Screen and Lock Screen widgets, Repeating events and reminders, Shareable countdown cards, Offline use

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Widget Lifetime | $6.99 | one-time |


## Frequently asked questions

### Is zero free?

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

### Is Countdown Pro free?

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

### Do zero or Countdown Pro have ads?

Neither zero nor Countdown Pro shows ads.

### Which is updated more often, zero or Countdown Pro?

zero ships an update every 4 months, and Countdown Pro every 4 days. Most recently, zero was updated on October 25, 2026 and Countdown Pro on October 28, 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.*