Sunned vs Sun Day Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sunned
Monitor your vitamin D production from sun exposure and receive alerts to prevent sunburn. This app estimates your vitamin D levels and tracks supplementation, providing daily sunrise and sunset notifications.
- Vitamin D generation tracking
- Sunburn prevention alerts
- Estimated vitamin D level increase
- Sunrise and sunset notifications
- Supplementation tracking
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Get the optimal amount of Vitamin D from daily sunlight without risking sunburn or skin damage: - Personalized UV & Burn Clock: Real-time safe exposure calculations based on your skin type, time, UV index, and location. - Serum Level Trajectory: Track daily intake from sunlight and supplementation toward your target serum blood level. - Optimal Sun Window: Smart notifications for sunrise and sunset, circadian alignment, and when UV is high enough for synthesized D3.
Sun Day Tracker
Monitor your daily vitamin D absorption from sunlight exposure. This straightforward application helps you keep track of your sun-related vitamin D intake.
- Track daily vitamin D intake
- Sunlight exposure monitoring
- Simple interface
- Daily tracking
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A simple app to track you daily vitamin D intake from the sun.
Screenshots
Verdict
The clearest difference is rating: Sun Day Tracker at 4.6 against Sunned's 3.7. Sun Day Tracker also leads on ratings volume (28 vs 3) and iOS requirement (17.0 vs 26.0). Sunned's advantage is review sentiment (100% vs 83%). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sun Day Tracker holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: Sun Day Tracker has 28 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 100% of Sunned's written reviews are positive against 83% of Sun Day Tracker's, so the app with the better star average is not the one people write more warmly about.
Sunned ships an update every 4 weeks, Sun Day Tracker monthly. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.
| Parameter | Sunned | Sun Day Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 4.6 (28 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 83.3% of reviews |
| Number of ratings | 3 | 28 — better |
| Update frequency | Every 4 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Tindrels LLC | permissionless tech, llc |
Customer experience
Sunned
Sun Day Tracker
In-app purchases
Sunned
No in-app purchases
Sun Day Tracker
No in-app purchases
