Comparison

SunSense UV tracker vs Vitamin D Sun Tracker

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

Head to head
About

SunSense UV tracker

This app provides personalized UV exposure advice and forecasts to help you determine your skin type and recommended sun protection. It offers a "sun watch" tool for planning outdoor activities and suggests appropriate SPF levels for sunscreen.

Highlights
  • Personal skin type calculation
  • SPF recommendations
  • Outdoor activity planning
  • UV tolerance corrections
  • Worldwide UV forecast
  • 7-day weather forecast
Read full description

The SunSense app is the leading digital tool for providing forecasts and personal advice on sun protection. It helps you determining skin type and tailored max UV-dosage recommendations based upon previous exposure/achieved tan and sunscreen factor used. Our “sun watch” tool helps you plan your day, at the beach, working in the garden, going on holiday - all day every day. Get recommendation on which Sun Protection Factor sunscreen to apply, and how long you can stay outside using different SPF levels. Use it with SunSense personal UV-trackers for real-time tracking and monitoring of your individual UV-exposure and accumulated UV-dose. Trackers are available at www.sunsense.com Main features of the app: • Calculation of personal skin type • SPF recommendations • Plan your day: Calculate how long you can stay in the sun with a certain SPF. Plan breaks and get protection recommendations in The SunWatch interface. • UV-tolerance corrections based on experience and sensor readings • Sun advice • Web shop • Tutorials • Worldwide UV-forecast provided by EUMETSAT. • Worldwide 7-day weather forecast NOTE: Calculations are based on information provided by leading scientists within the field, Individual tolerances and differences in use, application of sunscreen as well as local conditions mean these recommendations are only guidelines. Caution should always be exercised when exposing your body to direct sunlight as this can cause sunburn and different long-term, harmful effects including cancer. NOTE: Continued use of GPS running in the background can dramatically decrease battery life.

About

Vitamin D Sun Tracker

This app estimates your Vitamin D intake from sun exposure and supplements. It provides real-time UV index, weather, and personalized guidance on optimal sun times and duration to prevent sunburn. Track your progress with historical data and insights.

Highlights
  • Real-time Vitamin D estimates
  • Live UV Index and weather integration
  • Personalized sun timer with sunburn guidance
  • 48-hour UV forecast for optimal exposure
  • Supplement and cofactor tracking
  • Historical data and trend analysis
  • Optional Apple Health integration
Read full description

Vitamin D is the easiest deficiency to fix, but the hardest to track. Bask estimates the Vitamin D you get from sun exposure and supplements, so you can stop guessing and start hitting your goal. Bask is a sun tracker and sun timer that reads the sky, live UV Index, weather, your skin, and what you're wearing to tell you the best time to step outside and exactly how long to stay. SUN SESSIONS + SUN SAFETY - Real-time Vitamin D estimates from our live UV Index, UV tracker, weather, and our sun tracker algorithm - Built-in sun timer with time-to-sunburn guidance so you never overdo it - Time-to-sunburn timer can assist you during your tanning sessions. - Live Activities keep your session on the Lock Screen (iOS 16.1+) FIND YOUR BEST SUN WINDOWS - 48-hour UV forecast of your optimal exposure times with our sun tracker - Get alerts right before your best Vitamin D window opens SUPPLEMENTS + COFACTORS - Quick-log common vitamin D doses in a tap with our vitamin tracker - Track magnesium & vitamin K2 with bite-size education cards HISTORY, STREAKS & INSIGHTS - A clean timeline of every sun exposure session and supplementation. - Track Vitamin D labs to see the impact of your sun exposure and supplement habits. - 7 / 30 / 90-day trends to watch your Vitamin D levels climb PRIVATE BY DESIGN - Your data stays on your device - Optional Apple Health integration - Optional opt-in leaderboard Bask is for educational and wellness tracking only and does not provide medical advice. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

SunSense UV tracker1 screens
Vitamin D Sun Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: SunSense UV tracker at none against Vitamin D Sun Tracker's 4. SunSense UV tracker also leads on rating (5.0 vs 4.8) and iOS requirement (13.0 vs 16.0). Vitamin D Sun Tracker's advantage is update cadence (weekly vs every 6 weeks) and ratings volume (30 vs 2). On price, review sentiment, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Vitamin D Sun Tracker sells 4 in-app purchases, starting at $4.99 per month. SunSense UV tracker asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SunSense UV tracker holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Vitamin D Sun Tracker has 30 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

SunSense UV tracker ships an update every 6 weeks, Vitamin D Sun Tracker weekly. The most recent releases landed on November 2, 2026 and November 9, 2026 respectively.

Scorecard6 real differences · 4 level
SunSense UV tracker versus Vitamin D Sun Tracker: the parameters behind the verdict, then further details
ParameterSunSense UV trackerVitamin D Sun Tracker
PriceFreeFree
Rating5.0 (2 ratings) — better4.8 (30 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings230 — better
Update frequencyEvery 6 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size47 MB42 MB
Age rating4+17+
DeveloperSunSense ASGreycloud LLC

Customer experience

SunSense UV tracker

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Vitamin D Sun Tracker

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SunSense UV tracker

No in-app purchases

4 purchases

Vitamin D Sun Tracker

Subscriptions3
  • Monthly$4.991 Month
  • Yearly3 Days trial$24.991 Year
  • Yearly3 Days trial$29.991 Year
One-time1
  • Lifetime$79.99

Questions

Is SunSense UV tracker free?
SunSense UV tracker is free to download, with no in-app purchases.
Is Vitamin D Sun Tracker free?
Vitamin D Sun Tracker is free to download, with in-app purchases available.
Which has better reviews, SunSense UV tracker or Vitamin D Sun Tracker?
SunSense UV tracker is rated higher. SunSense UV tracker averages 5.0 out of 5 from 2 ratings, while Vitamin D Sun Tracker averages 4.8 from 30 ratings.
Do SunSense UV tracker or Vitamin D Sun Tracker have ads?
Neither SunSense UV tracker nor Vitamin D Sun Tracker shows ads.
Which is updated more often, SunSense UV tracker or Vitamin D Sun Tracker?
SunSense UV tracker ships an update every 6 weeks, and Vitamin D Sun Tracker weekly. Most recently, SunSense UV tracker was updated on November 2, 2026 and Vitamin D Sun Tracker on November 9, 2026.

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