GoTall vs SunMax
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GoTall
This app predicts your maximum potential height using scientific data and personal factors like genetics, sleep, and activity. It provides a personalized growth plan with exercises, nutrition analysis, and lifestyle tracking to support your development. Premium features offer advanced tools and customized plans.
- Scientific height prediction
- Personalized growth plan
- Daily exercises
- Nutrition analysis
- Lifestyle tracking
- Puberty stage analysis
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GoTall is the most accurate height predictor. Here's why it works: 1. We use real science. GoTall uses data from the CDC, a group of top doctors and scientists who study how kids grow. 2. To guess your true potential, we ask about: Your parents' and relatives' height (because your genes matter) Your sleep, food, and activity (because habits affect growth) Your stage of puberty (because timing matters) We look at the full picture. Instead of guessing from just your age, we look at everything together. That’s why our results are more accurate than just using a growth chart. Stick to the growth plan, and we’ll keep guiding you every step of the way. GoTall gives you a custom growth plan that includes: Daily exercises proven to support posture, bone strength, and natural growth hormone activity Nutrition analysis that checks if your diet supports optimal growth Lifestyle tracking so you can improve sleep, habits, and recovery We also offer premium features with subscriptions or purchases, such as a custom plan designed to support natural HGH production and optimal growth, or monthly updates that adjust your plan based on your habits and progress, so you can stay on track. Disclaimer: GoTall doesn’t offer medical advice. Our recommendations are based on widely known practices related to height growth. Always speak to a healthcare provider for individualized guidance. Some features, including full analysis and advanced tools, require a premium subscription or purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
SunMax
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SunMax turns sunlight into science-based guidance for vitamin D and safer sun exposure. Using real-time UV data, a personalized profile, and a multi-factor model built around your skin type, exposed skin, sun angle, session timing, and weather conditions, SunMax helps you plan outdoor time more intentionally. KEY FEATURES Free features: • Personalized setup Create your profile, take the Fitzpatrick skin quiz, and tailor guidance to your body and skin type. • Vitamin D session tracking Start live sessions and watch your estimated vitamin D and burn-risk guidance update as conditions change. Daily limit of 20 minutes. • Real-time UV + weather intelligence View current UV, hourly trends, and forecast context to choose better times for sun exposure. • Apple Health sync Connect Apple Health to autofill your height, weight, and body metrics, import last night's sleep for your morning check-in, and save your sun-session vitamin D and time in daylight back to Health. Optional and off until you turn it on. • Daily goals, supplement logging, and reminders Track sunlight and supplement intake together so you stay consistent with your routine. • Account benefits (free) Create a free account to save and sync your data across devices, and customize avatar clothing for more accurate exposure estimates. • Limited past session logging Add up to 1 past session per day to backfill your history. Premium subscription features: • Unlimited vitamin D sessions Track as many sessions as you want with no daily time limits. • Unlimited past session logging Add as many past sessions as you need to complete your vitamin D history. • Morning and evening light routines Track circadian rhythm exposure separately from vitamin D sessions. • Wellbeing insights and correlations See how your sun exposure affects your sleep, mood, and energy throughout the day — enriched by sleep data from Apple Health. • Advanced analytics and longer-range trends View weekly and monthly progress with historical data and detailed insights. • Streak freeze protection Protect your daily streak with monthly freeze days. Subscription details: SunMax offers optional auto-renewing subscriptions for Premium features, including monthly, yearly, and lifetime options where available. A 7-day free trial may be offered to eligible new subscribers. Built for walks, workouts, beach days, and everyday time outdoors, SunMax helps you use sunlight more intentionally. Important: SunMax provides estimates and guidance, not medical advice. Terms of Service: https://www.sunmaxapp.com/terms-of-service/ Privacy Policy: https://www.sunmaxapp.com/privacy-policy/
Screenshots
Verdict
The clearest difference is ads: SunMax at none against GoTall's shown. On price, update cadence, in-app purchases 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
Both are free to download. GoTall sells 15 in-app purchases, starting at $1.99 per 7 days and SunMax sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
GoTall ships an update every 9 days, SunMax every 5 days. The most recent releases landed on October 19, 2026 and October 3, 2026 respectively.
| Parameter | GoTall | SunMax |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (6.8K ratings) — better | — |
| Positive reviews | 21.6% of reviews | — |
| Number of ratings | 6.8K — better | — |
| Update frequency | Every 9 days | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 132 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Grow Labs LLC | Oliver Stojcevski |
Bugs and requests
GoTall
Reported bugs
1 issue- Paywall blocks access to core functionality
Requested features
2 requests- Free access to height prediction results
- More transparency about data usage
SunMax
Not enough reviews yet to summarise bugs or requests.
In-app purchases
GoTall
- Weekly Access$1.997 Days
- Weekly Access$3.997 Days
- GoTall Access7 Days trial$4.997 Days
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- GoTall Weekly Plan$4.997 Days
- Weekly Access$5.997 Days
- Yearly Access$9.991 Year
- Monthly Access2 variants$9.991 Month
- Yearly Access$34.991 Year
- GoTall Yearly Plan$39.991 Year
- Yearly Access$49.991 Year
- Yearly Access3 Days trial$59.991 Year
- GoTall Yearly Plan3 Days trial$59.991 Year
- GoTall Yearly Pro7 Days trial$59.991 Year
- Lifetime Access$9.99
- Permanent Access$24.99
SunMax
- Premium Monthly7 Days trial$4.991 Month
- Premium Yearly7 Days trial$39.991 Year
- SunMax Premium Lifetime$69.99









