# Countdown.App vs Contacts Address Book

The clearest difference is in-app purchases: Countdown.App at none against Contacts Address Book's 4. Countdown.App also leads on device support (3 vs 1) and iOS requirement (9.0 vs 16.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Contacts Address Book sells 3 in-app purchases, starting at $3.99 per month. Countdown.App asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 weeks. The most recent releases landed on December 26, 2025 and October 21, 2026 respectively.

## The numbers

| Metric | Countdown.App | Contacts Address Book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (53 ratings)](https://appshunter.io/ios/app/contacts-address-book-amicu/id1481868897/reviews)** |
| Number of ratings | — | **53** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | Every 4 weeks |
| Monetization | — | Freemium |
| Size | 13 MB | 29 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andreas Geitmann](https://appshunter.io/developer/490080327) | [Kai Oelfke](https://appshunter.io/developer/644779478) |

## What reviewers say

### Countdown.App

[App page](https://appshunter.io/ios/app/countdownapp/id1093133683)

**Features:** macOS Compatibility

**In-app purchases:** none


### Contacts Address Book

[App page](https://appshunter.io/ios/app/contacts-address-book-amicu/id1481868897)

This app helps you nurture your personal relationships by reminding you to stay in touch and celebrate important birthdays. It offers a private and offline experience, allowing you to manage contacts and set custom reminders to keep your social circle strong.

**Highlights:** Birthday reminders, Keep-in-touch reminders, Contact management, Offline functionality, Customizable notifications, Widgets

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $3.99 | per month |
| Premium | $29.99 | per year |
| Premium | $29.99 | per year |


## Frequently asked questions

### Is Countdown.App free?

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

### Is Contacts Address Book free?

Contacts Address Book is free to download, with in-app purchases available.

### Do Countdown.App or Contacts Address Book have ads?

Neither Countdown.App nor Contacts Address Book shows ads.

### Which is updated more often, Countdown.App or Contacts Address Book?

Countdown.App ships an update every 4 weeks, and Contacts Address Book every 4 weeks. Most recently, Countdown.App was updated on December 26, 2025 and Contacts Address Book on October 21, 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.*