Comparison

Great Butt Workout vs HeatLab

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

Head to head
About

Great Butt Workout

Achieve a toned behind in 8 weeks with this guided workout program. Featuring an audio coach, motivational elements, and progress tracking, it's designed for beginners needing just 10 minutes, 3 times a week.

Highlights
  • 8-week beginner-to-toned butt program
  • Personal audio coach guidance
  • 10-minute workouts, 3 times/week
  • Earn wins and badges
  • Compatible with all music apps
  • Stretching and warmup videos
Read full description

Want a great butt? This app will take you there. It will train you from beginner to a toned butt in 8 Weeks! Get ready to live your dream ! Great Butt is made by experts, the same people that built the awesome 5K Runner and 10K Runner apps. ----- ABOUT THE APP ----- This app will get you in shape by gradually training you zero exercising to a toned butt 8 weeks. You only need this app to guide & motivate you and 10 minutes, 3 times a week, for 8 weeks. When you are done, you will be much stronger and have a much better looking butt. When you start a workout, you turn on your favorite music, and then the app's audio coach tells you exactly what exercise to do, when to rest, and when to resume. The app also keeps you motivated, which is the key to success and the true magic of the app. The plan is achievable and enjoyable even by people that never liked to exercise, and you will earn wins and badges as you go along. With this app, you will have a better butt. COACHING ● from zero to a toned butt in 8 weeks ● guided by your personal audio coach ● starts easy and slowly increases the situps ● straight & simple MUSIC ● listen to your music while exercising ● audio coach gently blends in when needed ● compatible with ALL music apps MOTIVATION ● earn wins and badges ● share your wins on Facebook, Twitter, mail ● meet other trainees on our Facebook community ● motivational quotes for your mind & body SUCCESS ● only 10 mins a day, 3 days a week, 8 weeks ● designed to make any beginner succeed ● extensive guidance for beginners ● answers to common questions AND THERE'S MORE ● stretching & warmup videos ● detailed information & guidance ● integrated with Apple Health ● Privacy Policy & Terms Of Use: https://www.fitness22.com/privacy-policy https://s3.amazonaws.com/fitness22content.com/Components/WebPages/TermsOfUse/TermsOfUse.html ----- CONTACT US ----- Dear customers, we are here for you! support@fitness22.com

About

HeatLab

Track your heated workouts like hot yoga and pilates with this specialized app. It analyzes your heart rate and body's adaptation to heat, providing insights beyond generic fitness trackers. Monitor trends and understand your progress in extreme temperature environments.

Highlights
  • Track heated workouts (hot yoga, pilates, sculpt)
  • Apple Watch integration for live heart rate
  • Heat Fitness Score and resting HR delta
  • Zone analysis and personal records
  • On-device AI insights and session summaries
  • Unlimited session history (Pro)
  • Custom class types
Features
Read full description

HeatLab is the heart rate and heat training app made for hot yoga, hot pilates, sculpt, and every heated workout in between. Track each class with your Apple Watch, then watch your body adapt to the heat over weeks and months. Generic fitness apps don't understand heated training. A 145 bpm average means something different at 105°F than at room temperature, and a basic "calories burned" stat tells you nothing about how your body is acclimating. HeatLab is built specifically for the heated workout community. TRACK WHAT MATTERS Tap to start on your Apple Watch - Vinyasa, Pilates, Sculpt, Bikram, Barre, or any custom class. Live heart rate, elapsed time, a rolling HR chart, and an ambient "Zen" visualization keep you focused mid-session. After class, capture the room temperature and your perceived effort. Workouts sync automatically to Apple Health and HeatLab on iOS. UNDERSTAND YOUR HEAT FITNESS • Heat Fitness Score - a composite score that builds with each heated session and reflects your real adaptation • Resting HR delta - proof the heat is working, tracked from your first heated session forward • Baseline comparisons - every session benchmarked against your personal baseline for that temperature • Zone analysis - time-weighted breakdown across HR zones 1–5, per session and per temperature bucket • Personal records - highest max HR, longest time in zone 4+, and more, by class type and overall • Trend charts and period-over-period comparisons by week, month, or year AI INSIGHTS, ON YOUR DEVICE HeatLab uses Apple Intelligence to generate session summaries and trend insights - all on-device. Your data never leaves your iPhone. On devices without Apple Intelligence, a powerful analysis backend drives the insights. BUILT FOR APPLE WATCH HealthKit-native workout sessions, dual-path background sync, always-on display, and device lock for sweaty sessions. Sessions arrive on your iPhone the moment you're back in range. DESIGNED FOR THE STUDIO • Filter by class type, temperature bucket, or date range • Edit class type, temperature, notes, or duration after the fact • Streaks, week-over-week comparisons, and weekly zone distribution • Smart claim flow for workouts you forgot to record on your Watch • Custom class types - add Hot HIIT, Heated Strength, or whatever you practice HEATLAB PRO Free tier includes core tracking, sync, and the past 7 days of history. Pro unlocks: • Unlimited session history • Apple Intelligence session summaries and AI insights • Heat Fitness Score and resting HR trend • Zone analysis and personal records • Full period-over-period comparisons Available as a monthly or annual subscription. Restore purchases anytime. PRIVACY Your health data stays on your device. AI runs locally through Apple Intelligence - your sessions, heart rate, and notes are never sent to a server. Built by a small team that practices what we ship. Questions? Email support@heatlab.app - we read every message. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Great Butt Workout4 screens
HeatLab4 screens

Verdict

The call

The clearest difference is price: HeatLab at Free against Great Butt Workout's $2.99. HeatLab also leads on update cadence (every 5 days vs every 9 months) and review sentiment (100% vs 84%). Great Butt Workout's advantage is ratings volume (496 vs 4) and iOS requirement (10.0 vs 26.2). On rating, ads, 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

HeatLab is free to download; Great Butt Workout costs $2.99 up front. Great Butt Workout sells 2 in-app purchases, starting at $2.99 per 3 months and HeatLab sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Great Butt Workout against 5.0 for HeatLab. That said, the two scores are not equally well evidenced: Great Butt Workout has 496 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 84% of Great Butt Workout's written reviews are positive against 100% of HeatLab's.

UpkeepUpdate frequency

Great Butt Workout ships an update every 9 months, HeatLab every 5 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
Great Butt Workout versus HeatLab: the parameters behind the verdict, then further details
ParameterGreat Butt WorkoutHeatLab
Price$2.99Free — better
Rating4.9 (496 ratings)5.0 (4 ratings) — better
Positive reviews83.8% of reviews100.0% of reviews — better
Number of ratings496 — better4
Update frequencyEvery 9 monthsEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS10.0 — better26.2
Further details — not scored
Size130 MB11 MB
Age rating4+4+
DeveloperFITNESS22 LTDCasey MacPhee

Customer experience

Great Butt Workout

All ratings496 ratings
Positive97.2%
Neutral1.4%
Negative1.4%
Written reviews37 reviews
Positive83.8%
Neutral10.8%
Negative5.4%

HeatLab

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Great Butt Workout

Reported bugs

3 issues
  • Won't run on iPad
  • Apple Health sync not functioning
  • Volume instructions appear despite no audio content

Requested features

7 requests
  • Multiple difficulty levels (beginner, intermediate, advanced)
  • Exercise demonstration images or videos
  • iPad compatibility
  • Apple Health integration
  • Additional exercises beyond the basic three
Show 2 more
  • Progressive difficulty increase throughout program
  • Extended workout options after completing 8-week program

HeatLab

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Great Butt Workout

Subscriptions1
  • Premium Subscription$2.993 Months
One-time1
  • Lifetime Premium$3.99
2 purchases

HeatLab

Subscriptions2
  • HeatLab Pro Monthly$4.991 Month
  • HeatLab Pro Annual$39.991 Year

Questions

Is Great Butt Workout free?
Great Butt Workout costs $2.99, and also offers in-app purchases.
Is HeatLab free?
HeatLab is free to download, with in-app purchases available.
Which has better reviews, Great Butt Workout or HeatLab?
HeatLab is rated higher. Great Butt Workout averages 4.9 out of 5 from 496 ratings, while HeatLab averages 5.0 from 4 ratings.
Do Great Butt Workout or HeatLab have ads?
Neither Great Butt Workout nor HeatLab shows ads.
Which is updated more often, Great Butt Workout or HeatLab?
Great Butt Workout ships an update every 9 months, and HeatLab every 5 days. Most recently, Great Butt Workout was updated on November 1, 2026 and HeatLab on October 31, 2026.

Other comparisons