# Personal Interval Timer vs ShotClock by RackDiscipline

The clearest difference is price: Personal Interval Timer at Free against ShotClock by RackDiscipline's $3.99. Personal Interval Timer also leads on update cadence (every 4 weeks vs every 3 months) and ratings volume (15 vs 2). ShotClock by RackDiscipline's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Personal Interval Timer is free to download; ShotClock by RackDiscipline costs $3.99 up front. Personal Interval Timer sells 1 one-off in-app purchase. ShotClock by RackDiscipline asks for nothing beyond the download.

ShotClock by RackDiscipline holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Personal Interval Timer has 15 ratings behind it against 2, so its average is the more settled of the two.

Personal Interval Timer ships an update every 4 weeks, ShotClock by RackDiscipline every 3 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Personal Interval Timer | ShotClock by RackDiscipline |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [4.8 (15 ratings)](https://appshunter.io/ios/app/personal-interval-timer/id1479646964/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/shotclock-by-rackdiscipline/id6448687219/reviews)** |
| Number of ratings | **15** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 weeks** | Every 3 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 7 MB | 1 MB |
| Requires iOS | **14.2** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AlexApps.Net Co](https://appshunter.io/developer/972261962) | [Paul Carpenter](https://appshunter.io/developer/1685588974) |

## What reviewers say

### Personal Interval Timer

[App page](https://appshunter.io/ios/app/personal-interval-timer/id1479646964)

This app helps you manage timed workouts for sports like boxing, HIIT, and Tabata. It offers customizable presets, workout history tracking, and works with a locked screen and background music. Share your routines with friends and receive voice or bell notifications.

**Highlights:** Works with locked screen, Plays with background music, Saves custom presets, Share workouts with friends, History and progress charts, Voice or bell notifications

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |


### 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


## Frequently asked questions

### Is Personal Interval Timer free?

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

### Is ShotClock by RackDiscipline free?

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

### Which has better reviews, Personal Interval Timer or ShotClock by RackDiscipline?

ShotClock by RackDiscipline is rated higher. Personal Interval Timer averages 4.8 out of 5 from 15 ratings, while ShotClock by RackDiscipline averages 5.0 from 2 ratings.

### Do Personal Interval Timer or ShotClock by RackDiscipline have ads?

Personal Interval Timer shows ads; ShotClock by RackDiscipline does not.

### Which is updated more often, Personal Interval Timer or ShotClock by RackDiscipline?

Personal Interval Timer ships an update every 4 weeks, and ShotClock by RackDiscipline every 3 months. Most recently, Personal Interval Timer was updated on October 24, 2026 and ShotClock by RackDiscipline on October 30, 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.*