# O vs Countdowner

The clearest difference is in-app purchases: O at none against Countdowner's 1. O also leads on iOS requirement (16.4 vs 18). Countdowner's advantage is update cadence (every 9 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Countdowner sells 1 one-off in-app purchase. O asks for nothing beyond the download.

O ships an update every 4 months, Countdowner every 9 days. Both last shipped on November 7, 2026.

## The numbers

| Metric | O | Countdowner |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | — | Paid |
| Size | 43 MB | 6 MB |
| Requires iOS | **16.4** | 18 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [blassl & partner](https://appshunter.io/developer/1636450043) | [Fabian Will](https://appshunter.io/developer/1842834628) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-tis-app/id1636683380)

**Features:** Vision Pro support

**In-app purchases:** none


### Countdowner

[App page](https://appshunter.io/ios/app/countdowner-countdown-widget/id6758725253)

Easily track important dates like birthdays, vacations, and weddings with custom countdowns. Add widgets to your home and lock screens for quick visibility and receive timely reminders. Sync across devices and Apple Watch for seamless event tracking.

**Highlights:** Unlimited custom countdowns, Home and Lock Screen widgets, Local event reminders, Apple Watch sync, iCloud device sync, Customizable themes and icons

**Features:** Family Sharing, Apple Watch app, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $1.99 | one-time |


## Frequently asked questions

### Is O free?

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

### Is Countdowner free?

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

### Do O or Countdowner have ads?

Neither O nor Countdowner shows ads.

### Which is updated more often, O or Countdowner?

O ships an update every 4 months, and Countdowner every 9 days. Most recently, O was updated on November 7, 2026 and Countdowner on November 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.*