# O vs Countdowner

The clearest difference is price: O at Free against Countdowner's $0.99. O also leads on iOS requirement (16.4 vs 18). Countdowner's advantage is update cadence (every 3 weeks vs every 4 months). On ads, in-app purchases and device support there is nothing between them.

O is free to download; Countdowner costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

O ships an update every 4 months, Countdowner every 3 weeks. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | O | Countdowner |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| 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-event-countdown/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:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is Countdowner free?

Countdowner costs $0.99, with no in-app purchases.

### 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 3 weeks. Most recently, O was updated on October 14, 2026 and Countdowner on October 8, 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.*