# SolGlow vs Aurnia

SolGlow and Aurnia are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. SolGlow sells 2 in-app purchases, starting at $9.99 per year and Aurnia sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

SolGlow ships an update every 10 days, Aurnia weekly. The most recent releases landed on October 31, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | SolGlow | Aurnia |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | Freemium | — |
| Size | 10 MB | 20 MB |
| Requires iOS | 17.2 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Michael Smith](https://appshunter.io/developer/1893971383) | [JIYULMOM](https://appshunter.io/developer/379186743) |

## 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 |


### Aurnia

[App page](https://appshunter.io/ios/app/aurnia-sleep-tracker/id6764247734)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aurnia Pro Monthly | $6.99 | per month |
| Aurnia Pro Annual | $39.99 | per year |


## Frequently asked questions

### Is SolGlow free?

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

### Is Aurnia free?

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

### Do SolGlow or Aurnia have ads?

Neither SolGlow nor Aurnia shows ads.

### Which is updated more often, SolGlow or Aurnia?

SolGlow ships an update every 10 days, and Aurnia weekly. Most recently, SolGlow was updated on October 31, 2026 and Aurnia on November 9, 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.*