# ThatOneThing Tracker vs Chrono Countdown

The clearest difference is ads: ThatOneThing Tracker at none against Chrono Countdown's shown. ThatOneThing Tracker also leads on update cadence (daily vs monthly). Chrono Countdown's advantage is iOS requirement (16.4 vs 18.2). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ThatOneThing Tracker ships an update daily, Chrono Countdown monthly. The most recent releases landed on September 12, 2026 and August 27, 2026 respectively.

## The numbers

| Metric | ThatOneThing Tracker | Chrono Countdown |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/chrono-countdown-event-clock/id6743369111/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Monthly |
| Monetization | — | Ad-supported |
| Size | 5 MB | 48 MB |
| Requires iOS | 18.2 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Redpolls Inc.](https://appshunter.io/developer/1796289125) | [Rob Cleozier](https://appshunter.io/developer/799668901) |

## What reviewers say

### ThatOneThing Tracker

[App page](https://appshunter.io/ios/app/thatonething-tracker/id6742381162)

**Features:** macOS Compatibility

**In-app purchases:** none


### Chrono Countdown

[App page](https://appshunter.io/ios/app/chrono-countdown-event-clock/id6743369111)

Track important life events with precise, real-time countdowns. Set reminders for birthdays, vacations, deadlines, and more with a clean, intuitive interface. Organize your upcoming moments and cherish past memories.

**Highlights:** Unlimited countdown timers, Real-time countdown clock, Smart event reminders, Customizable event details (notes, icons, names), Timeline view of upcoming events, Track past events and memories, Secure local data storage

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

**In-app purchases:** none


## Frequently asked questions

### Is ThatOneThing Tracker free?

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

### Is Chrono Countdown free?

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

### Do ThatOneThing Tracker or Chrono Countdown have ads?

Chrono Countdown shows ads; ThatOneThing Tracker does not.

### Which is updated more often, ThatOneThing Tracker or Chrono Countdown?

ThatOneThing Tracker ships an update daily, and Chrono Countdown monthly. Most recently, ThatOneThing Tracker was updated on September 12, 2026 and Chrono Countdown on August 27, 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.*