Comparison

Virtual Heart vs Intervals Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Virtual Heart

Explore a realistic, animated human heart with multiple internal and external views. Adjust heart rate, view blood flow, and learn about the circulatory system through interactive labels and information.

Highlights
  • Realistic animated heart model
  • External and internal views
  • Adjustable heart rate
  • Blood flow and electrical system visualization
  • Interactive key labels
  • Educational information
Features
Read full description

Virtual Heart lets you explore multiple real-time views of the human heart, using the same highly realistic visual elements as the iconic Giant Heart at the Museum of Science and Industry, Chicago. This vibrant 13-foot-tall animated heart from MSI's YOU! The Experience is now also available in convenient iPad size. Take a visual and educational touchscreen journey through the beating heart, developed in collaboration with XVIVO Scientific Animation. Choose from an external view or three internal views showing the heart's valves, blood flow or electrical system at work inside the beating heart. Controls let you adjust the heart rate anywhere from 30 to 180 beats per minute, or to enable key labels identifying different areas of the heart’s structure. Learn more about the heart and circulatory system with additional information presented on the display. Virtual Heart is not a static picture, but realistically animated and constantly beating like a live heart you can explore at multiple levels. It's the most amazing view of the heart you can get without rib spreaders.

About

Intervals Pro

Create and follow custom interval training routines for various fitness activities. This app offers extensive customization for intervals, alerts, and goals, with seamless integration for Apple Watch and Apple Health.

Highlights
  • Highly customizable intervals (time/distance)
  • Spoken interval names and prompts
  • Standalone Apple Watch workouts
  • Workout history with Apple Health
  • Home screen widgets for quick launch
  • Bluetooth heart rate monitor support
  • Siri Shortcuts integration
Features
Read full description

Custom Interval Training at its best for iPhone, Apple Watch and iPad. Featured by Apple and recommended by fitness instructors, personal trainers, marathon runners, and coaches. Let Intervals Pro guide you through any type of interval workout: HIIT, running, strength training, yoga, stretching, circuit training, boxing, MMA, elliptical, rehabilitation, meditation, 7-minute workouts, and many more. FEATURED BY • Apple - App of the Day in 132 Countries • Apple - Workout with Apple Watch, Quick HIIT Workouts • Women's Health Magazine • COACH Magazine • SixColors.com HIGHLIGHTS • Highly Customizable • Home Screen Widgets to quickly launch timers • Spoken interval names and prompts • Customizable alert sounds • Standalone Apple Watch workouts. Leave your iPhone at home! • Workout History using Apple Health data • View an Apple Watch workout live on your iPhone! • Run in the background with the screen locked • Play music or podcasts using the app of your choice • Bluetooth heart rate monitor support for Apple Watch or iPhone • Fill your Activity Rings • Siri Shortcuts • Share timers with friends • Time and Distance Goals • Running Pace and Heart Rate Targets • Auto pause and resume • Send completed workouts to Strava • Confetti! PERSONALIZE YOUR WORKOUT • Customize the Name, Duration, Alert, and Color for each interval • Customize Alert Sounds and Voice Prompts to guide you through your workout • Set a Countdown Alert and vibrations when the interval is about to end • Optional halfway alert • Set target heart rate ranges for each interval • Set time and distance goals FLEXIBLE INTERVAL DURATIONS • Time based (e.g., 45 seconds) • Distance-based (e.g., 0.5 MI or KM) • Count up intervals keep running until your ready for the next interval • Estimated time or distance. Count down time or distance to zero and then continue the interval, counting up until you're ready to move on. THE BEST APPLE WATCH INTERVAL TIMER • Leave your phone at home with our standalone Apple Watch app • Control your music or podcasts on the "Now Playing" screen • View an Apple Watch workout live on your iPhone • Alert Sounds and Voice Prompts to guide you through your workout • Configurable haptic alert countdown that taps you on the wrist when the interval is ending • Track heart rate, calories, distance, and pace • Route tracking for running, walking, and cycling • Workouts contribute to the Apple Watch Activity Rings WORKOUT HISTORY USING APPLE HEALTH • Intervals Pro has the best Apple Health integration of any interval training app • Track heart rate, calories, distance, and pace • Route tracking for running, walking, and cycling • Detailed stats for every interval • All your data is safely stored in Apple Health GREAT FOR RUNNING AND CYCLING • Interval duration can be set to either a specified time or distance • Display current pace, pace for the interval, or pace for the entire run • Configure heart rate ranges per interval • Analyze each interval of your run in the workout history MULTIPLE VOICES AND LANGUAGES • Select the language and voice to use for all spoken alerts. • Spoken alerts are localized to 10 languages. Chinese (simplified), Danish, Dutch, French, German, Italian, Norwegian, Polish, Spanish, and Swedish. Get Intervals Pro today, and your workouts will never be the same! SUBSCRIPTION INFO Intervals Pro is free to download and has a free timer. To create multiple timers and unlock all the features of the app, you may choose between a monthly or yearly auto-renewing subscription option. Upon confirmation of the purchase, payment will be charged to your credit card through your iTunes account. Subscription renews automatically unless canceled at least 24 hours before the end of the subscription period. Subscriptions can be managed and auto-renewal turned off in Account Settings in the App Store app. Privacy Policy and Terms of Service: https://intervalspro.com/privacy-policy.html

Screenshots

Intervals Pro4 screens

Verdict

The call

The clearest difference is rating: Intervals Pro at 4.8 against Virtual Heart's 3.5. Intervals Pro also leads on update cadence (every 8 days vs every 5 months) and ratings volume (14K vs 24). Virtual Heart's advantage is in-app purchases (none vs 8) and iOS requirement (4.0 vs 17.5). On price and ads 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. Intervals Pro sells 8 in-app purchases, starting at $2.99 per month. Virtual Heart asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Intervals Pro holds the better App Store score, 4.8 against 3.5. That said, the two scores are not equally well evidenced: Intervals Pro has 14K ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 67% of Virtual Heart's written reviews are positive against 84% of Intervals Pro's.

UpkeepUpdate frequency

Virtual Heart ships an update every 5 months, Intervals Pro every 8 days. The most recent releases landed on September 29, 2026 and October 15, 2026 respectively.

Scorecard8 real differences · 2 level
Virtual Heart versus Intervals Pro: the parameters behind the verdict, then further details
ParameterVirtual HeartIntervals Pro
PriceFreeFree
Rating3.5 (24 ratings)4.8 (14K ratings) — better
Positive reviews66.7% of reviews84.3% of reviews — better
Number of ratings2414K — better
Update frequencyEvery 5 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, Apple Watch — better
Requires iOS4.0 — better17.5
Further details — not scored
Size62 MB69 MB
Age rating4+4+
DeveloperMuseum of Science and Industry, ChicagoIntervals, LLC

Customer experience

Virtual Heart

All ratings24 ratings
Positive58.3%
Neutral12.5%
Negative29.2%
Written reviews21 reviews
Positive66.7%
Neutral14.3%
Negative19.0%

Intervals Pro

All ratings13,612 ratings
Positive95.1%
Neutral1.7%
Negative3.2%
Written reviews1,083 reviews
Positive84.3%
Neutral4.9%
Negative10.8%

Bugs and requests

Virtual Heart

Not enough reviews yet to summarise bugs or requests.

Intervals Pro

Reported bugs

2 issues
  • Workout data not syncing correctly
  • App crashes or freezes on certain devices

Requested features

3 requests
  • More customization options for interval displays
  • Ability to batch delete or manage workout history
  • Integration with more third-party fitness apps

In-app purchases

None

Virtual Heart

No in-app purchases

8 purchases

Intervals Pro

Subscriptions2
  • Monthly Membership7 Days trial$2.991 Month
  • Yearly Membership7 Days trial$19.991 Year
One-time6
  • Generous Tip$0.99
  • Awesome Tip$1.99
  • Massive Tip$4.99
Show 3 more
  • Amazing Tip$9.99
  • Intervals Pro (Legacy)$69.99
  • Lifetime Access$69.99

Questions

Is Virtual Heart free?
Virtual Heart is free to download, with no in-app purchases.
Is Intervals Pro free?
Intervals Pro is free to download, with in-app purchases available.
Which has better reviews, Virtual Heart or Intervals Pro?
Intervals Pro is rated higher. Virtual Heart averages 3.5 out of 5 from 24 ratings, while Intervals Pro averages 4.8 from 14K ratings.
Do Virtual Heart or Intervals Pro have ads?
Neither Virtual Heart nor Intervals Pro shows ads.
Which is updated more often, Virtual Heart or Intervals Pro?
Virtual Heart ships an update every 5 months, and Intervals Pro every 8 days. Most recently, Virtual Heart was updated on September 29, 2026 and Intervals Pro on October 15, 2026.

Other comparisons