# Sunned: Vitamin D & Sun Timer — UV Index, Safe Tan & Forecast

> Vitamin D tracker and sun exposure timer with UV alerts. (iPhone/iPad app by Tindrels LLC.)

- Source: https://appshunter.io/ios/app/sunned-vitamin-d-and-sun-timer/id6741027703 (this page in markdown: same URL + `.md`)
- Developer: [Tindrels LLC](https://appshunter.io/developer/1665283532)
- Category: Health & Fitness, Weather
- Price: Free
- Rating: 3.70/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 4 MB
- Languages: American English
- Released: 2025-02-19
- Data updated: 2026-09-03
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/sunned-vitamin-d-and-sun-timer/id6741027703/reviews.md

## What is Sunned?

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.

## Key features

- Vitamin D generation tracking
- Sunburn prevention alerts
- Estimated vitamin D level increase
- Sunrise and sunset notifications
- Supplementation tracking

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/sunned-vitamin-d-and-sun-timer/id6741027703/reviews.md

### 5/5 — Fantastic app ☀️

*2026-04-15*

My vitamin D is an abysmal 29, and I really need to get it higher. Was so happy to discover this app - been super helpful. All my friends are so deficient and need this. Highly recommend!

## Frequently asked questions about Sunned

### What is Sunned used for?

Sunned is used to track vitamin D generated from sun exposure, receive alerts to prevent sunburn, and estimate vitamin D blood level increases over time. It also notifies you about sunrise, sunset, and when vitamin D is available or no longer available each day.

### How accurate is Sunned's vitamin D estimation?

The app provides estimates on how much your vitamin D blood levels are increasing. Specific accuracy metrics are not detailed in the provided data.

### Does Sunned have ads?

No, Sunned does not contain advertisements.

### What devices does Sunned support?

Sunned is currently supported on iPhone devices.

### What is the age rating for Sunned?

Sunned has an age rating of 4+.

### How often is Sunned updated?

The latest version of Sunned is 1.25, and it was last updated on May 21, 2026.

### Can Sunned track vitamin D supplements?

Yes, Sunned allows you to track the effects of any vitamin D supplementation you are taking.

### What is the user rating for Sunned?

Sunned has a rating of 3.7 stars based on 3 user ratings.

## Version history (last 5 releases)

### 2.0.0 — 2026-08-25

- Enhanced progress towards daily goal view.
- Cleaner Today theming, especially when transitioning from light to dark.
- Improved error handling and retry mechanisms.
- Bug fixes.

### 1.30 — 2026-08-10

- New onboarding. 
- New progress experience. 
- Improved "time to burn" calculations and notifications.
- Restyled session timer & live activity.
- Simplified sun path.
- Rearchitected backend. 
- Bug fixes.

### 1.26 — 2026-06-20

- Bug fixes.

### 1.25 — 2026-05-21

- Minor language edits.
- Bug fixes.

### 1.24 — 2026-04-06

- iOS 26 adaptations.
- Bug fixes.

## Apps similar to Sunned

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Vitamin D Sun Tracker - Bask](https://appshunter.io/ios/app/vitamin-d-sun-tracker-bask/id6758405235) | 4.9 (9) | Free | Health & Fitness |
| [Daylight Tracker](https://appshunter.io/ios/app/daylight-tracker/id6754945391) | — | Free | Health & Fitness |
| [SunDose!](https://appshunter.io/ios/app/sundose/id6742912257) | 5.0 (4) | Free | Health & Fitness |
| [Solari - Circadian Health](https://appshunter.io/ios/app/solari-circadian-health/id6759310733) | — | Free | Health & Fitness |
| [SunMax: Vitamin D Tracker](https://appshunter.io/ios/app/sunmax-vitamin-d-tracker/id6749281214) | — | Free | Health & Fitness |
| [Hello Sun - Vitamin D Tracker](https://appshunter.io/ios/app/hello-sun-vitamin-d-tracker/id6756599125) | 5.0 (1) | Free | Health & Fitness |

## More apps by Tindrels LLC

- [StepCrush: Team Step Challenge](https://appshunter.io/ios/app/stepcrush-team-step-challenge/id6745056964)

All apps by Tindrels LLC: https://appshunter.io/developer/1665283532

## Related topics

[free vitamin d tracker](https://appshunter.io/ios/topics/free-vitamin-d-tracker)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*