# Countdown Stack vs One

The clearest difference is in-app purchases: One at none against Countdown Stack's 2. One also leads on update cadence (every 9 days vs every 2 months) and iOS requirement (15.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Countdown Stack sells 2 in-app purchases, starting at $0.29 per month. One asks for nothing beyond the download.

Countdown Stack ships an update every 2 months, One every 9 days. The most recent releases landed on September 24, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Countdown Stack | One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/countdown-stack/id6745722215/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 27 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmitry Khotinskiy](https://appshunter.io/developer/1603030256) | [Yellowsquared LLC](https://appshunter.io/developer/1785941696) |

## What reviewers say

### Countdown Stack

[App page](https://appshunter.io/ios/app/countdown-stack/id6745722215)

Easily track important upcoming events and personal goals. This app provides a clean interface to visualize your milestones, from birthdays to deadlines, across all your Apple devices. Unlock unlimited tracking and advanced features with an in-app purchase.

**Highlights:** Event and goal tracking, Clean and modern interface, Cross-device synchronization, Beautifully displayed countdowns, Unlimited countdowns (in-app purchase)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $0.29 | per month |
| Premium (Annual) | $2.49 | per year |


### One

[App page](https://appshunter.io/ios/app/one-tap-timestamp-log-timeli/id6746956173)

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

**In-app purchases:** none


## Frequently asked questions

### Is Countdown Stack free?

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

### Is One free?

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

### Do Countdown Stack or One have ads?

Neither Countdown Stack nor One shows ads.

### Which is updated more often, Countdown Stack or One?

Countdown Stack ships an update every 2 months, and One every 9 days. Most recently, Countdown Stack was updated on September 24, 2026 and One 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.*