SunSync vs Sunshine D3
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SunSync
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Always tired, waking groggy, or struggling to fall asleep? The cause might be simpler than you think β your morning light routine. SunSync syncs your day to the sun. Track sunlight exposure, estimate your vitamin D intake, and get personalized circadian rhythm guidance β all based on your real location and habits. Your body clock controls your sleep, energy, mood, and focus. SunSync helps you work with it β not against it. With SunSync you can: - Track sunlight exposure and daily light habits β know when you've hit your target - Estimate vitamin D from sun exposure based on your skin type and location - Log supplements and monitor your total daily intake - Follow personalized circadian recommendations for your schedule - Discover your best sunlight windows β and when to avoid the UV index - Build routines to improve sleep and melatonin production naturally - Set smart reminders for sunrise, sunset, and wind-down time - Add a home screen widget β see your vitamin D window at a glance, without opening the app - View history and long-term trends to see your progress Built for the biohacking community β and anyone who just wants to feel better. Whether you're optimizing for performance or simply tired of being tired, SunSync gives you the sunlight data your wellness routine has been missing. Vitamin D tracking, body clock alignment, supplement logging, and a home screen widget showing your vitamin D window β in one app. Disclaimer: SunSync provides estimates and general wellness guidance. It is not a medical device and does not replace professional medical advice. Terms: https://martarodriguezm.github.io/SunSyncLegal/terms.html Privacy Policy: https://martarodriguezm.github.io/SunSyncLegal/privacy.html
Sunshine D3
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It helps you determine the optimal time to get vitamin D3 when sunbathing. It also provides information about the relationship between the sun and vitamin D3. It helps you avoid sun damage.
Screenshots
Verdict
The clearest difference is in-app purchases: Sunshine D3 at none against SunSync's 2. Sunshine D3 also leads on iOS requirement (15.0 vs 17.6). SunSync's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). On price and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. SunSync sells 2 in-app purchases, starting at $1.99 per year. Sunshine D3 asks for nothing beyond the download.
SunSync ships an update every 3 weeks, Sunshine D3 every 4 months. The most recent releases landed on September 25, 2026 and October 17, 2026 respectively.
| Parameter | SunSync | Sunshine D3 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks β better | Every 4 months |
| Ads | No β better | Yes |
| In-app purchases | Yes | No β better |
| Devices | iPhone | iPhone, iPod β better |
| Requires iOS | 17.6 | 15.0 β better |
| Further details β not scored | ||
| Size | 22 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Marta Rodriguez | Ihsan Gercelman |
In-app purchases
SunSync
- Year3 Days trial$1.991 Year
- Lifetime$2.99
Sunshine D3
No in-app purchases









