# chrtz vs Let's duck

The clearest difference is in-app purchases: chrtz at none against Let's duck's 1. chrtz also leads on iOS requirement (16.2 vs 26.6). Let's duck's advantage is update cadence (every 3 days vs weekly). On price, ads and device support there is nothing between them.

Both are free to download. Let's duck sells 1 one-off in-app purchase. chrtz asks for nothing beyond the download.

chrtz ships an update weekly, Let's duck every 3 days. The most recent releases landed on September 30, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | chrtz | Let's duck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lets-duck/id6767806557/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 59 MB | 11 MB |
| Requires iOS | **16.2** | 26.6 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Sungsu Choi](https://appshunter.io/developer/1718370500) | [trung truong](https://appshunter.io/developer/1895562173) |

## What reviewers say

### chrtz

[App page](https://appshunter.io/ios/app/chrtz/id6757950661)

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

**In-app purchases:** none


### Let's duck

[App page](https://appshunter.io/ios/app/lets-duck/id6767806557)

This app features a pixelated duck that lives on your Apple Watch and encourages movement without pressure. It integrates with Apple Health, tracks workouts, and offers a calming breathing exercise. Optional purchases unlock customization and history.

**Highlights:** Integrates with Apple Health, Tracks various workout types, Offers guided breathing exercises, Customizable duck outfits and colors, Displays workout stats, Watch face complications and widgets

**Features:** Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Let's Duck Unlimited | $0.99 | one-time |


## Frequently asked questions

### Is chrtz free?

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

### Is Let's duck free?

Let's duck is free to download, with in-app purchases available.

### Do chrtz or Let's duck have ads?

Neither chrtz nor Let's duck shows ads.

### Which is updated more often, chrtz or Let's duck?

chrtz ships an update weekly, and Let's duck every 3 days. Most recently, chrtz was updated on September 30, 2026 and Let's duck on October 11, 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.*