Getting a beautiful, even tan shouldn’t come at the cost of sunburn, skin damage, or guesswork. That’s where SunTanApp comes in — a science-backed, user-friendly tool that helps you tan smarter, not longer.
We help you track sun exposure in real time using sophisticated UV analysis, skin type modeling, and personalized recommendations. You’ll never again wonder how long is too long in the sun.
All this happens behind the scenes — you just get clear, friendly prompts like:
Because your skin isn't a stopwatch.
Every body region responds to UV differently. Your arms and face might tan quickly, while your legs or back need more time. And UV levels don’t just vary by cloud cover — they’re affected by altitude, humidity, pollution, time of year, and even environment reflectivity (yes, really).
SunTanApp handles all of that.
Our #1 priority is helping you build a natural, healthy tan without burning.
That’s why we never push you toward your burn threshold — we calculate the safe, optimal UV dose based on years of dermatological research and adjust it dynamically as your tan deepens or fades.
You’ll tan faster, fade slower, and avoid the cycle of “burn-then-peel” damage that prematurely ages skin and raises cancer risk.
These factors change how your skin reacts to the sun:
We use this to personalize your sun plan, so you’re not using the same logic as someone half your age with twice your melanin.
We’ve modeled everything from sun angle to regional melanin decay rates so you don’t have to. What would take a spreadsheet, a UV meter, and hours of research… we boil down to a simple session timer with intelligent reminders.
You just focus on feeling good and enjoying the sun — we’ll handle the science.
Even when you stay under your burn threshold, UV exposure still stresses the outermost skin cells. This can accelerate your skin’s natural turnover, especially after long or intense sessions. Peeling doesn’t always mean you burned—it’s often a sign of your body shedding older skin as newer, more melanin-rich cells rise to the surface. Hydration, moisturizers, and even rotation technique can affect how smooth this process feels.
SunTanApp uses a personalized pigmentation tracking system that simulates your skin's response to UV exposure over time. We don’t just count the minutes in the sun — we track Tan Dose Units (TDU), which reflect how much melanogenic stimulus your skin receives based on UV intensity, duration, and your unique skin type.
We calculate a base tan level from 0% to 100% to represent your current pigmentation compared to your skin’s full tanning potential. This isn’t just a visual estimate — it’s based on peer-reviewed data for how each Fitzpatrick skin type responds to UV over multiple sessions.
The app uses your current base tan to adjust recommended TDU for each session. For example, when you’re just starting out, lower TDU sessions can trigger strong pigmentation. As you tan, your body becomes more resistant, and higher doses are required — but never beyond safe levels. Our algorithm always targets optimum melanogenesis, not maximum UV exposure.
Once your tan reaches 80–90%, you’re in what we call the maintenance phase. You’ll:Our system tapers your recommendations automatically, helping you maintain your color safely without burning or accelerating skin aging.