Comparison

SunMax vs PrimalGPT

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

Head to head
About

SunMax

Read full description

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/

About

PrimalGPT

This AI-powered assistant offers personalized advice on primal, carnivore, and ancestral nutrition. Get instant answers, detailed research, and customize your AI's preferences for a tailored approach to healthy eating and living. Analyze meals, track habits, and find local food sources.

Highlights
  • Personalized primal and carnivore nutrition advice
  • AI chat assistant with voice input/output
  • Meal analysis and nutritional insights via photo
  • Diet Score and habit tracking
  • Farm Finder for local food sources
  • Customizable AI personality and dietary preferences
Features
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Eat naturally. Think independently. PrimalGPT is the AI chat assistant built for people interested in primal, carnivore, ancestral, and natural nutrition. Instead of generic one-size-fits-all advice, PrimalGPT provides personalized answers about whole foods, meat, organ meats, dairy, traditional diets, and healthy living. Ask anything and get instant answers, or switch to detailed mode when you want deeper explanations and research-backed insights. Customize your AI's personality and dietary preferences so every answer fits your lifestyle and goals. Talk instead of type. Use voice input, listen to responses with text-to-speech, or start real-time AI voice conversations for a hands-free experience. Analyze your meals instantly. Take a photo of your food to receive nutritional insights, track your eating habits with Diet Score, and build healthy routines with daily streaks. Find real food sources. Farm Finder and our community-powered map help you discover local farms, quality meat suppliers, raw dairy sources, and other natural food producers near you. Start free in guest mode, create a free account for daily access, or upgrade to Primal Pro for unlimited chats, unlimited voice calls, and access to all premium features. PrimalGPT provides AI-generated information for educational purposes only and does not provide medical advice. Always consult a qualified healthcare professional regarding health and dietary decisions. Download PrimalGPT and discover a more natural approach to nutrition and healthy living. https://primalgpt.de/terms https://primalgpt.de/privacy

Screenshots

SunMax4 screens
PrimalGPT4 screens

Verdict

The call

The clearest difference is iOS requirement: SunMax at 15.0 against PrimalGPT's 18.0. On price, update cadence, ads and in-app purchases 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. SunMax sells 3 in-app purchases, starting at $4.99 per month and PrimalGPT sells 1 in-app purchase, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SunMax ships an update every 5 days, PrimalGPT every 4 days. The most recent releases landed on September 16, 2026 and September 27, 2026 respectively.

Scorecard1 real difference · 9 level
SunMax versus PrimalGPT: the parameters behind the verdict, then further details
ParameterSunMaxPrimalGPT
PriceFreeFree
Rating—5.0 (51 ratings) — better
Positive reviews—75.0% of reviews
Number of ratings—51 — better
Update frequencyEvery 5 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size27 MB13 MB
Age rating4+12+
DeveloperOliver StojcevskiNikolay Tonkov

In-app purchases

3 purchases

SunMax

Subscriptions2
  • Premium Monthly7 Days trial$4.991 Month
  • Premium Yearly7 Days trial$39.991 Year
One-time1
  • SunMax Premium Lifetime$69.99
1 purchases

PrimalGPT

Subscriptions1
  • Pro Monthly3 Days trial$7.991 Month

Questions

Is SunMax free?
SunMax is free to download, with in-app purchases available.
Is PrimalGPT free?
PrimalGPT is free to download, with in-app purchases available.
Do SunMax or PrimalGPT have ads?
Neither SunMax nor PrimalGPT shows ads.
Which is updated more often, SunMax or PrimalGPT?
SunMax ships an update every 5 days, and PrimalGPT every 4 days. Most recently, SunMax was updated on September 16, 2026 and PrimalGPT on September 27, 2026.

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