# SolGlow vs Sunshine D3

The clearest difference is in-app purchases: Sunshine D3 at none against SolGlow's 2. Sunshine D3 also leads on iOS requirement (15.0 vs 17.2). SolGlow's advantage is ads (none vs shown) and update cadence (every 10 days vs every 2 months). On price and device support there is nothing between them.

Both are free to download. SolGlow sells 2 in-app purchases, starting at $9.99 per year. Sunshine D3 asks for nothing beyond the download.

SolGlow ships an update every 10 days, Sunshine D3 every 2 months. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | SolGlow | Sunshine D3 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/solglow-vitamin-d-tracker/id6763976252/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | Freemium | — |
| Size | 10 MB | 9 MB |
| Requires iOS | 17.2 | **15.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Michael Smith](https://appshunter.io/developer/1893971383) | [Ihsan Gercelman](https://appshunter.io/developer/1895469057) |

## What reviewers say

### SolGlow

[App page](https://appshunter.io/ios/app/solglow-vitamin-d-tracker/id6763976252)

This app automatically estimates your daily vitamin D intake based on sunlight exposure, skin type, and location. It provides real-time UV index, burn-safe time remaining, and integrates with Apple Watch for effortless tracking. Features include winter mode, supplement check-ins, and advanced planning tools for Pro users.

**Highlights:** Automatic vitamin D estimation, Live UV index and IU-per-minute rate, Burn-safe time remaining with alerts, Winter Mode for low-sun periods, Supplement check-in, 7-day UV forecast (Pro), Trip Planner for jet lag (Pro)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SolGlow Pro Annual | $9.99 | per year |
| SolGlow Pro | $29.99 | one-time |


### Sunshine D3

[App page](https://appshunter.io/ios/app/sunshine-d3/id6766470179)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SolGlow free?

SolGlow is free to download, with in-app purchases available.

### Is Sunshine D3 free?

Sunshine D3 is free to download, with no in-app purchases.

### Do SolGlow or Sunshine D3 have ads?

Sunshine D3 shows ads; SolGlow does not.

### Which is updated more often, SolGlow or Sunshine D3?

SolGlow ships an update every 10 days, and Sunshine D3 every 2 months. Most recently, SolGlow was updated on October 31, 2026 and Sunshine D3 on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*