# JSK vs Boxing Timer

The clearest difference is in-app purchases: JSK at none against Boxing Timer's 1. JSK also leads on ads (none vs shown) and device support (3 vs 1). Boxing Timer's advantage is update cadence (weekly vs every 3 weeks). On price and iOS requirement there is nothing between them.

Both are free to download. Boxing Timer sells 1 one-off in-app purchase. JSK asks for nothing beyond the download.

JSK ships an update every 3 weeks, Boxing Timer weekly. The most recent releases landed on October 10, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | JSK | Boxing Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/boxing-timer-shadow-coach/id6788214618/reviews)** |
| Number of ratings | — | **6** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 40 MB | 59 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Thwalhath PP](https://appshunter.io/developer/1862163538) | [Yacine Kahlis](https://appshunter.io/developer/1884933899) |

## What reviewers say

### JSK

[App page](https://appshunter.io/ios/app/jsk/id6756703572)

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

**In-app purchases:** none


### Boxing Timer

[App page](https://appshunter.io/ios/app/boxing-timer-shadow-coach/id6788214618)

This app provides a customizable round timer for combat sports and HIIT workouts. It features hands-free voice control, randomized combo callouts from a virtual coach, and adjustable settings for rounds, rest, and alerts. The app is designed for use during intense training sessions.

**Highlights:** Hands-free voice control, Randomized coach combo callouts, Customizable round and rest times, Adjustable alerts and sounds, Full-screen color options, Pre-set workout modes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Punch Clock Pro | $6.99 | one-time |


## Frequently asked questions

### Is JSK free?

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

### Is Boxing Timer free?

Boxing Timer is free to download, with in-app purchases available.

### Do JSK or Boxing Timer have ads?

Boxing Timer shows ads; JSK does not.

### Which is updated more often, JSK or Boxing Timer?

JSK ships an update every 3 weeks, and Boxing Timer weekly. Most recently, JSK was updated on October 10, 2026 and Boxing Timer on September 21, 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.*