# 30 Day Butt Workout Challenge vs Interval Timer for Apple Watch

The clearest difference is monetization model: Interval Timer for Apple Watch at freemium against 30 Day Butt Workout Challenge's subscription. Interval Timer for Apple Watch also leads on update cadence (every 8 days vs every 2 months) and rating (5.0 vs 4.6). 30 Day Butt Workout Challenge's advantage is ratings volume (1.2K vs 5) and iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 30 Day Butt Workout Challenge sells 10 in-app purchases, starting at $0.99 per 7 days and Interval Timer for Apple Watch sells 5 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Interval Timer for Apple Watch holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: 30 Day Butt Workout Challenge has 1.2K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 78% of 30 Day Butt Workout Challenge's written reviews are positive against 100% of Interval Timer for Apple Watch's.

30 Day Butt Workout Challenge ships an update every 2 months, Interval Timer for Apple Watch every 8 days. The most recent releases landed on October 25, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | 30 Day Butt Workout Challenge | Interval Timer for Apple Watch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (1.2K ratings)](https://appshunter.io/ios/app/30-day-butt-workout-challenge/id1377092487/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/interval-timer-for-apple-watch/id6737627055/reviews)** |
| Number of ratings | **1.2K** | 5 |
| Positive reviews | 77.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | Subscription | **Freemium** |
| Size | 60 MB | 64 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Rumble](https://appshunter.io/developer/1368434055) | [Vladyslav Lietun](https://appshunter.io/developer/1528499723) |

## What reviewers say

### 30 Day Butt Workout Challenge

[App page](https://appshunter.io/ios/app/30-day-butt-workout-challenge/id1377092487)

This app offers a structured 30-day glute and lower-body fitness program designed for women. It provides guided video workouts, toning exercises, and diet plans to help users achieve a firmer, lifted, and beautifully shaped physique without needing a gym.

**Highlights:** 30-day glute and butt lift challenge, Expert glute workouts for all levels, Video and image exercise instructions, Lower-body and body toning programs, 5 diet plans for better results, Water reminder, Apple HealthKit integration

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Butt Challenge Weekly | $0.99 | per 7 days |
| Weekly Subscription | $0.99 | per 7 days |
| Butt Monthly | $1.99 | per month |
| Weekly Subscription | $1.99 | per 7 days |
| 30 Day Butt Challenge (Weekly) | $2.99 | per 7 days |
| Monthly Subscription | $5.99 | per month |
| 30 Day Ab Challenge (Monthly) | $8.99 | per month |
| Yearly Plan | $29.99 | per year |
| Bikini body challenge | $37.99 | per 6 months |
| Butt Challenge Life Time | $39.99 | one-time |

**What reviewers like**

- 👍 Simple to follow
- 👍 Easy to use
- 👍 Good demonstrations
- 👍 Effective exercises
- 👍 Motivating

**What reviewers complain about**

- 💰 Paid content locked behind paywall
- 🐛 Crashes and freezes
- 🐛 Compatibility issues
- 🔋 Frequent pop-up ads

**Reported bugs**

- App crashes on opening
- Workout progress resets unexpectedly

**Requested features**

- Pause/resume functionality
- Music playback support
- Customizable workout plans


### Interval Timer for Apple Watch

[App page](https://appshunter.io/ios/app/interval-timer-for-apple-watch/id6737627055)

This minimalist timer app helps you manage exercise and rest periods for effective workouts. Customize intervals, stay on track with timely notifications, and focus on your fitness goals with its clean interface.

**Highlights:** Quick timer setup, Customizable intervals, Rest period notifications, Minimalist user interface, Native iOS development

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Timestro Pro - Monthly | $1.99 | per month |
| Timestro Pro - Yearly | $11.99 | per year |
| Timestro Pro - Yearly | $17.99 | per year |
| Timestro Pro | $11.99 | one-time |
| Timestro Pro | $17.99 | one-time |


## Frequently asked questions

### Is 30 Day Butt Workout Challenge free?

30 Day Butt Workout Challenge is free to download, with in-app purchases available.

### Is Interval Timer for Apple Watch free?

Interval Timer for Apple Watch is free to download, with in-app purchases available.

### Which has better reviews, 30 Day Butt Workout Challenge or Interval Timer for Apple Watch?

Interval Timer for Apple Watch is rated higher. 30 Day Butt Workout Challenge averages 4.6 out of 5 from 1.2K ratings, while Interval Timer for Apple Watch averages 5.0 from 5 ratings.

### Do 30 Day Butt Workout Challenge or Interval Timer for Apple Watch have ads?

Neither 30 Day Butt Workout Challenge nor Interval Timer for Apple Watch shows ads.

### Which is updated more often, 30 Day Butt Workout Challenge or Interval Timer for Apple Watch?

30 Day Butt Workout Challenge ships an update every 2 months, and Interval Timer for Apple Watch every 8 days. Most recently, 30 Day Butt Workout Challenge was updated on October 25, 2026 and Interval Timer for Apple Watch on October 22, 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.*