Comparison

HIIT vs SOAR Study

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

Head to head
About

HIIT

Design and track custom interval running workouts with real-time data and audio cues. This app offers detailed post-run analysis and integrates with Apple Health and Apple Watch for phone-free training.

Highlights
  • Customizable intervals (time, distance, open)
  • Support for HIIT, tempo, fartlek, pyramid, progression workouts
  • Real-time tracking of pace, cadence, heart rate
  • Audio cues for guidance
  • Phone-free Apple Watch operation
  • Post-run analysis and GPX export
  • Apple Health integration
Features
Read full description

Tired of tapping through menus before a run? Interval Running is a simple HIIT, tabata, and interval timer - say what you want, it builds the intervals, you run. Just tell it what you want. Say something like "eight rounds, 30 seconds fast, 30 seconds easy" and the timer builds your program right then - no forms, no menus, no fields to fill in before you can start running. Prefer to build it yourself? You can: - Set work and rest by time, distance, or leave it open - Choose HIIT, tabata, fartlek, tempo, or plain run/walk intervals - Save a routine once, reuse it whenever you want Everything you need is on the screen while you run, no extra taps. - Interval, pace, cadence, and heart rate at a glance - Audio cues tell you when to switch, no need to look down - Full Apple Watch support - leave your phone at home You don't want a training plan, a coach, or a program - you want a timer that starts and stops intervals exactly when you tell it to. You want to set up a workout on the way to the track without stopping to tap through screens. You do tabata or HIIT sessions and just need something that counts rounds. You run intervals on your own terms and don't want an app deciding your pace for you. After each run, see your intervals, pace, and heart rate. Export GPX files, sync with Apple Health, and connect an external heart rate monitor if you use one. Health app integration With your permission, your interval runs count toward Activity Rings, including the Exercise and Move rings. Say it. Start it. Run. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

SOAR Study

Participate in a research study by responding to surveys about your thoughts, feelings, and behaviors. The app also collects sensor data to understand your activity, environment, and smartphone usage.

Highlights
  • Survey responses
  • Sensor data collection
  • Activity tracking
  • Environment monitoring
  • Smartphone usage analysis
Features
Read full description

As part of your participation in the SOAR research study, you will be asked to respond to surveys which ask questions about your thoughts, feelings, and behaviors. Additionally, the app will collect sensor data to understand your activity levels, environment and how you use your smartphone. Your app experience is unique and has been designed by the Study Team using the Metricwire Research Portal. All of the data you submit during your study experience is protected by Metricwire and controlled by your Study Team. If you have any questions please contact the SOAR study team using the contact information they have provided.

Screenshots

HIIT4 screens
SOAR Study4 screens

Verdict

The call

The clearest difference is rating: HIIT at 4.3 against SOAR Study's 1.0. HIIT also leads on ratings volume (34 vs 2). SOAR Study's advantage is in-app purchases (none vs 8) and iOS requirement (14.0 vs 17.0). On price, update cadence, ads and device support 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. HIIT sells 8 in-app purchases, starting at $0.99 per month. SOAR Study asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

HIIT holds the better App Store score, 4.3 against 1.0. That said, the two scores are not equally well evidenced: HIIT has 34 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 18, 2026 and September 30, 2026 respectively.

Scorecard5 real differences · 5 level
HIIT versus SOAR Study: the parameters behind the verdict, then further details
ParameterHIITSOAR Study
PriceFreeFree
Rating4.3 (34 ratings) — better1.0 (2 ratings)
Positive reviews57.1% of reviews—
Number of ratings34 — better2
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS17.014.0 — better
Further details — not scored
Size83 MB205 MB
Age rating4+4+
DeveloperMaxim KazakovMetricWire Inc.

Customer experience

HIIT

All ratings34 ratings
Positive82.4%
Neutral2.9%
Negative14.7%
Written reviews7 reviews
Positive57.1%
Neutral14.3%
Negative28.6%

SOAR Study

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

8 purchases

HIIT

Subscriptions7
  • Premium Monthly Day 2$0.991 Month
  • Premium Weekly7 Days trial$3.997 Days
  • Premium Monthly Day 1$4.991 Month
Show 4 more
  • Premium Monthly7 Days trial$9.991 Month
  • Premium 3 Months$19.993 Months
  • Premium Annual Special Offer7 Days trial$29.991 Year
  • Interval Run Premium Yearly7 Days trial$59.991 Year
One-time1
  • Intreval Run Premium Lifetime$39.99
None

SOAR Study

No in-app purchases

Questions

Is HIIT free?
HIIT is free to download, with in-app purchases available.
Is SOAR Study free?
SOAR Study is free to download, with no in-app purchases.
Which has better reviews, HIIT or SOAR Study?
HIIT is rated higher. HIIT averages 4.3 out of 5 from 34 ratings, while SOAR Study averages 1.0 from 2 ratings.
Do HIIT or SOAR Study have ads?
Neither HIIT nor SOAR Study shows ads.
Which is updated more often, HIIT or SOAR Study?
HIIT ships an update every 2 weeks, and SOAR Study every 2 weeks. Most recently, HIIT was updated on September 18, 2026 and SOAR Study on September 30, 2026.

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