Comparison

Sleepmax vs HeightGPT

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

Head to head
About

Sleepmax

Effortlessly track your sleep patterns and gain insights to improve your rest. Simply place your phone near your pillow and let the app do the work. Wake up to detailed results and suggestions for better sleep.

Highlights
  • Easy sleep tracking
  • Sleep analysis results
  • Performance optimization
  • Personalized suggestions
  • Subscription for full analysis
Features
Read full description

Want to start optimizing your sleep for peak performance? Sleepmax makes tracking your sleep a piece of cake. 1. Click "Begin Tracking" 2. Place the phone next to your pillow 3. Don't turn off your phone, let the screen fade out When you wake up, click Done, and your results will be ready! If you have any ideas or questions, please email team@ninelives.tech to contact us! NOTE: We do not offer medical advice. Any and all recommendations should be viewed as suggestions. * Analysis results require a subscription TERMS: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

HeightGPT

This AI-powered app helps you track and optimize your height growth. It offers personalized training, habit optimization, and predictive analytics based on various factors like genetics and lifestyle. Visualize your progress and achieve your growth potential.

Highlights
  • AI-powered height predictions
  • Growth visualizations
  • Personalized training plans
  • Growth habit optimization
  • Parental and genetics analysis
  • Smart to-do list for growth
Features
Read full description

HeightGPT: Unlock Your Growth Potential (Premium App) Achieve your dream height with HeightGPT, the ultimate height-tracking and optimization app powered by AI. With stunning visualizations, predictive analytics, and personalized training routines, HeightGPT helps you take control of your growth journey like never before. Whether you're aiming for a height milestone, optimizing your habits, or just curious about your growth potential, HeightGPT provides the tools and insights to track progress and maximize results.  Our AI-driven technology analyzes key factors—such as genetics, sleep, nutrition, and training—to help you grow smarter. From tracking your current height to visualizing your future growth trajectory, HeightGPT ensures that every step is backed by science, giving you the best chance to reach your maximum potential. Premium Features (Subscription Required): > AI-Powered Height Predictions – Calculate your odds of reaching your dream height based on genetics, lifestyle, and growth trends. > Stunning Growth Visualizations – See how your height compares to projections and watch your progress with interactive charts. > Personalized Height Training Plans – Get expert-designed routines tailored to your body, habits, and goals to maximize growth. > Growth Habit Optimization – Track sleep, nutrition, and exercise to ensure you're supporting your height potential. > Parent & Genetics Analysis – Use parental height, shoe size, and age-based growth patterns to fine-tune predictions. > Smart To-Do List for Growth – AI-generated daily tasks help you build better habits to maximize height gains. Why Choose HeightGPT? HeightGPT isn't just another height tracker—it's your personal AI growth coach. By analyzing size, weight, gender, age, ethnicity, parental height, sleep habits, and training routines, we create a tailored growth strategy for you. Whether you're an athlete, a growing teen, or just someone curious about your height potential, HeightGPT provides the science-backed insights and actionable steps you need to grow taller—or at least optimize your posture and appearance for maximum height impact. Our AI-enhanced coaching goes beyond tracking—it helps you develop the habits, training routines, and lifestyle adjustments needed to reach your full height potential. What Makes HeightGPT Different? > Advanced AI Predictions – We analyze multiple factors to give you the most accurate height projections available. > Next-Level Visuals – Stunning interactive charts bring your growth data to life. > Holistic Growth Approach – No stone is left unturned—nutrition, sleep, training, and genetics are all factored in. > Perfect for All Users – Whether you're a teenager, an athlete, or someone optimizing their posture, HeightGPT is built for anyone who wants to maximize their height potential. Download HeightGPT Today Start your premium growth journey and unlock your full potential with HeightGPT. Subscription Options: Weekly subscription available > Lifetime access (one-time purchase) option > All features require an active subscription or lifetime purchase > Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period > Payment will be charged to your Apple ID account at confirmation of purchase HeightGPT: Aim Higher.

Screenshots

Sleepmax4 screens
HeightGPT4 screens

Verdict

The call

The clearest difference is rating: Sleepmax at 5.0 against HeightGPT's 4.4. Sleepmax also leads on review sentiment (100% vs 83%). HeightGPT's advantage is device support (3 vs 1). On price, ratings volume, update cadence 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. Sleepmax sells 1 in-app purchase, starting at $3.99 per 7 days and HeightGPT sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sleepmax holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 8 and 15 respectively. Written reviews point the same way: 100% of Sleepmax's written reviews are positive against 83% of HeightGPT's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. Both last shipped on October 24, 2026.

Scorecard3 real differences · 7 level
Sleepmax versus HeightGPT: the parameters behind the verdict, then further details
ParameterSleepmaxHeightGPT
PriceFreeFree
Rating5.0 (8 ratings) — better4.4 (15 ratings)
Positive reviews100.0% of reviews — better83.3% of reviews
Number of ratings815 — better
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.615.1 — better
Further details — not scored
Size33 MB56 MB
Age rating4+4+
DeveloperNine Lives LLCBoulevard Legacy LLC

Customer experience

Sleepmax

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

HeightGPT

All ratings14 ratings
Positive78.6%
Neutral7.1%
Negative14.3%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

In-app purchases

1 purchases

Sleepmax

Subscriptions1
  • SleepMax Access3 Days trial$3.997 Days
2 purchases

HeightGPT

Subscriptions1
  • Weekly$3.997 Days
One-time1
  • One Time$29.99

Questions

Is Sleepmax free?
Sleepmax is free to download, with in-app purchases available.
Is HeightGPT free?
HeightGPT is free to download, with in-app purchases available.
Which has better reviews, Sleepmax or HeightGPT?
Sleepmax is rated higher. Sleepmax averages 5.0 out of 5 from 8 ratings, while HeightGPT averages 4.4 from 15 ratings.
Do Sleepmax or HeightGPT have ads?
Neither Sleepmax nor HeightGPT shows ads.
Which is updated more often, Sleepmax or HeightGPT?
Sleepmax ships an update weekly, and HeightGPT weekly. Most recently, Sleepmax was updated on October 24, 2026 and HeightGPT on October 24, 2026.

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