30 Day Splits Challenge vs Interval Workout & HIIT Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
30 Day Splits Challenge
This 30-day program uses a mix of active and passive stretching to improve flexibility, increase range of motion, and reduce injury risk. It's designed to help users achieve greater flexibility, even if they've struggled with other methods.
- 30-day flexibility program
- Active stretching techniques
- Passive stretching techniques
- Increase range of motion
- Reduce injury risk
- Improve posture
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Flexibility is the key to unleashing power and speed by increasing the range of motion active (agonist) muscles have to travel before they are held back by the opposing (antagonist) ones. Being more flexible can also reduce the chances of injury when exercising, though the biggest benefit will be in the way you walk and stand. This 30-day program will help you increase your flexibility. The program utilises a mixture of active (leg raises) and passive (holding the splits position) stretching techniques to give you the fastest gains possible in the shortest time. If you have stiff hamstrings, locked-up hips, and a painful lower back; if you’ve tried yoga and stretching exercises, but didn’t see many results, then there’s a very good chance we can help you.
Interval Workout & HIIT Timer
This minimalist interval timer helps you focus on your workout by managing your timing. It offers multiple modes for HIIT, Tabata, and standard intervals, with customizable transition times and focus-friendly audio or haptic feedback. Seamlessly track progress on your lock screen.
- Multiple timer modes (HIIT, Tabata, standard)
- Customizable interval and rest periods
- Smart 'Interval Gap' transition timer
- Focus-friendly audio cues and haptic feedback
- Live Activities and Dynamic Island integration
- Background notifications
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Time HIIT workouts, Tabata rounds, stretches, and yoga holds with custom work, rest, and transition intervals. Set your routine and follow the cues so you can focus on each movement. Consistency is key. From flexibility training and active recovery to high-intensity intervals, we handle the timing so you can keep your mind calm and handle the effort. KEY FEATURES: Multiple Timer Modes: Instantly switch between dedicated Tabata, HIIT, and standard interval modes to perfectly match your routine. Effortless Controls: Quickly dial in your intervals, rest periods, and rounds with simple tap-and-go presets. No complex programming required. Smart "Gap" Timer: The unique "Interval Gap" feature gives you exactly enough time to switch sides, change equipment, or move into the next pose. Set a custom transition buffer so you never feel rushed. Focus-Friendly Feedback: Choose gentle audio cues to guide you without looking at the screen, or haptic vibrations for a silent experience perfect for the gym or late nights. Seamless iOS Integration: Keep an eye on your progress anywhere with full support for Live Activities on the Lock Screen and Dynamic Island. Background Notifications: Your timer keeps running perfectly, sending you notifications even if the app is in the background. PERFECT FOR: HIIT & Tabata: Crush your high-intensity intervals with precise work, rest, and count-in periods. Yoga & Flexibility: Maintain your yoga asanas consistently and improve your overall flexibility without breaking focus. Stretching & Recovery: Hold a static stretch for the exact right amount of time to aid in muscle recovery. Physical Therapy (PT): Manage rehab exercises with precision. Mobility Work: Open up hips, shoulders, and hamstrings with ease. SIMPLE BY DESIGN We believe fitness tools shouldn't be complicated. Experience a calm, clutter-free interface with no confusing menus and no distractions. Just clean, simple controls that help you build a better habit. INTERVAL TIMER PRO The standard Interval Timer is free. HIIT, Tabata, and Live Activities / Dynamic Island require Interval Timer Pro, available as a weekly auto-renewing subscription or a one-time lifetime purchase. Eligible new subscribers can try the weekly plan free for 3 days. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://stretchytimerdotcom.onrender.com/privacy.html
Screenshots
Verdict
The clearest difference is rating: Interval Workout & HIIT Timer at 5.0 against 30 Day Splits Challenge's 3.9. Interval Workout & HIIT Timer also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 9 months). 30 Day Splits Challenge's advantage is ratings volume (82 vs 1) and device support (3 vs 1). On price, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. 30 Day Splits Challenge sells 10 one-off in-app purchases and Interval Workout & HIIT Timer sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Interval Workout & HIIT Timer holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: 30 Day Splits Challenge has 82 ratings behind it against 1, so its average is the more settled of the two.
30 Day Splits Challenge ships an update every 9 months, Interval Workout & HIIT Timer every 3 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.
| Parameter | 30 Day Splits Challenge | Interval Workout & HIIT Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (82 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 51.3% of reviews | — |
| Number of ratings | 82 — better | 1 |
| Update frequency | Every 9 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 26.2 |
| Further details — not scored | ||
| Size | 44 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan Roobol | Massive Interface LLC |
Customer experience
30 Day Splits Challenge
Interval Workout & HIIT Timer
In-app purchases
30 Day Splits Challenge
- Remove Ads$0.99
- Create Workouts$0.99
- For Beginners$1.99
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- Full Body Stretching$1.99
- Upper Body Stretching$1.99
- 60 Day Splits Challenge$1.99
- Learn the Middle Splits$1.99
- 30 Day Splits Challenge$1.99
- Create Challenges$2.99
- Full Bundle$5.99
Interval Workout & HIIT Timer
- Home and Lock Screen Support$0.99
- Live Activities and Dynamic Island$1.99
Questions
Is 30 Day Splits Challenge free?
Is Interval Workout & HIIT Timer free?
Which has better reviews, 30 Day Splits Challenge or Interval Workout & HIIT Timer?
Do 30 Day Splits Challenge or Interval Workout & HIIT Timer have ads?
Which is updated more often, 30 Day Splits Challenge or Interval Workout & HIIT Timer?
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