# ShotClock by RackDiscipline vs Chalk Clock

The clearest difference is price: Chalk Clock at Free against ShotClock by RackDiscipline's $3.99. Chalk Clock also leads on update cadence (every 4 days vs every 3 months). ShotClock by RackDiscipline's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Chalk Clock is free to download; ShotClock by RackDiscipline costs $3.99 up front. Chalk Clock sells 2 in-app purchases, starting at $2.99 per month. ShotClock by RackDiscipline asks for nothing beyond the download.

ShotClock by RackDiscipline ships an update every 3 months, Chalk Clock every 4 days. The most recent releases landed on October 30, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | ShotClock by RackDiscipline | Chalk Clock |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/shotclock-by-rackdiscipline/id6448687219/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | Paid | — |
| Size | 1 MB | 200 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Paul Carpenter](https://appshunter.io/developer/1685588974) | [Ideal WebFx LLC](https://appshunter.io/developer/6775622360) |

## What reviewers say

### ShotClock by RackDiscipline

[App page](https://appshunter.io/ios/app/shotclock-by-rackdiscipline/id6448687219)

This configurable shot clock is designed for referees and tournament directors in cue sports like billiards and pool. It supports league and professional events, providing a simple timer solution for matches.

**Highlights:** Configurable shot clock, Designed for cue sports, Supports league events, Supports pro events, Simple timer interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Chalk Clock

[App page](https://appshunter.io/ios/app/chalk-clock-pool-scorekeeper/id6775622358)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chalk Clock Pro Monthly | $2.99 | per month |
| Chalk Clock Pro Yearly | $24.99 | per year |


## Frequently asked questions

### Is ShotClock by RackDiscipline free?

ShotClock by RackDiscipline costs $3.99, with no in-app purchases.

### Is Chalk Clock free?

Chalk Clock is free to download, with in-app purchases available.

### Do ShotClock by RackDiscipline or Chalk Clock have ads?

Chalk Clock shows ads; ShotClock by RackDiscipline does not.

### Which is updated more often, ShotClock by RackDiscipline or Chalk Clock?

ShotClock by RackDiscipline ships an update every 3 months, and Chalk Clock every 4 days. Most recently, ShotClock by RackDiscipline was updated on October 30, 2026 and Chalk Clock on October 16, 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.*