Comparison

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.

Head to head
About

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.

Highlights
  • 30-day flexibility program
  • Active stretching techniques
  • Passive stretching techniques
  • Increase range of motion
  • Reduce injury risk
  • Improve posture
Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

30 Day Splits Challenge4 screens
Interval Workout & HIIT Timer4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
30 Day Splits Challenge versus Interval Workout & HIIT Timer: the parameters behind the verdict, then further details
Parameter30 Day Splits ChallengeInterval Workout & HIIT Timer
PriceFreeFree
Rating3.9 (82 ratings)5.0 (1 ratings) — better
Positive reviews51.3% of reviews—
Number of ratings82 — better1
Update frequencyEvery 9 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better26.2
Further details — not scored
Size44 MB17 MB
Age rating4+4+
DeveloperStefan RoobolMassive Interface LLC

Customer experience

30 Day Splits Challenge

All ratings82 ratings
Positive69.5%
Neutral11.0%
Negative19.5%
Written reviews76 reviews
Positive51.3%
Neutral10.5%
Negative38.2%

Interval Workout & HIIT Timer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

10 purchases

30 Day Splits Challenge

One-time10
  • Remove Ads$0.99
  • Create Workouts$0.99
  • For Beginners$1.99
Show 7 more
  • 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
2 purchases

Interval Workout & HIIT Timer

One-time2
  • Home and Lock Screen Support$0.99
  • Live Activities and Dynamic Island$1.99

Questions

Is 30 Day Splits Challenge free?
30 Day Splits Challenge is free to download, with in-app purchases available.
Is Interval Workout & HIIT Timer free?
Interval Workout & HIIT Timer is free to download, with in-app purchases available.
Which has better reviews, 30 Day Splits Challenge or Interval Workout & HIIT Timer?
Interval Workout & HIIT Timer is rated higher. 30 Day Splits Challenge averages 3.9 out of 5 from 82 ratings, while Interval Workout & HIIT Timer averages 5.0 from 1 ratings.
Do 30 Day Splits Challenge or Interval Workout & HIIT Timer have ads?
30 Day Splits Challenge shows ads; Interval Workout & HIIT Timer does not.
Which is updated more often, 30 Day Splits Challenge or Interval Workout & HIIT Timer?
30 Day Splits Challenge ships an update every 9 months, and Interval Workout & HIIT Timer every 3 weeks. Most recently, 30 Day Splits Challenge was updated on November 6, 2026 and Interval Workout & HIIT Timer on October 31, 2026.

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