# Advent Calendar OpenGLEffects vs Christmas Countdown Tracker

The clearest difference is rating: Christmas Countdown Tracker at 5.0 against Advent Calendar OpenGLEffects's 2.0. Advent Calendar OpenGLEffects's advantage is in-app purchases (none vs 5) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Christmas Countdown Tracker sells 5 one-off in-app purchases. Advent Calendar OpenGLEffects asks for nothing beyond the download.

Christmas Countdown Tracker holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Advent Calendar OpenGLEffects ships an update every 24 months, Christmas Countdown Tracker every 13 months. The most recent releases landed on October 16, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Advent Calendar OpenGLEffects | Christmas Countdown Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (4 ratings)](https://appshunter.io/ios/app/advent-calendar-opengleffects/id479608586/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/christmas-countdown-tracker/id6468989529/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 15.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 24 months | **Every 13 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 113 MB | 165 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Kiefer](https://appshunter.io/developer/386426588) | [Tramboliko Games](https://appshunter.io/developer/887812129) |

## What reviewers say

### Advent Calendar OpenGLEffects

[App page](https://appshunter.io/ios/app/advent-calendar-opengleffects/id479608586)

Experience a visually stunning Advent Calendar with dynamic OpenGL effects. Discover interactive 3D galaxies and moving particle art each day, accompanied by festive music. Some doors require user interaction to reveal their surprises.

**Highlights:** OpenGL effects, 3D galaxies, Moving particle art, Interactive elements, Christmas music

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

**In-app purchases:** none


### Christmas Countdown Tracker

[App page](https://appshunter.io/ios/app/christmas-countdown-tracker/id6468989529)

This app helps you track the days and exact time remaining until your favorite holiday. Customize your countdown with festive characters and save special moments. A premium version offers classic Christmas songs.

**Highlights:** Holiday countdown timer, Customizable characters, Save images and videos, Classic Christmas songs (Premium), Two date options for countdown

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove watermark | $1.99 | one-time |
| Remove all the advertisement | $2.99 | one-time |
| Unlock all Christmas songs | $2.99 | one-time |
| Unlock all the designs | $2.99 | one-time |
| Full pack purchase | $6.99 | one-time |


## Frequently asked questions

### Is Advent Calendar OpenGLEffects free?

Advent Calendar OpenGLEffects is free to download, with no in-app purchases.

### Is Christmas Countdown Tracker free?

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

### Which has better reviews, Advent Calendar OpenGLEffects or Christmas Countdown Tracker?

Christmas Countdown Tracker is rated higher. Advent Calendar OpenGLEffects averages 2.0 out of 5 from 4 ratings, while Christmas Countdown Tracker averages 5.0 from 1 ratings.

### Do Advent Calendar OpenGLEffects or Christmas Countdown Tracker have ads?

Christmas Countdown Tracker shows ads; Advent Calendar OpenGLEffects does not.

### Which is updated more often, Advent Calendar OpenGLEffects or Christmas Countdown Tracker?

Advent Calendar OpenGLEffects ships an update every 24 months, and Christmas Countdown Tracker every 13 months. Most recently, Advent Calendar OpenGLEffects was updated on October 16, 2026 and Christmas Countdown Tracker on October 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*