# SunGuard vs SolGlow

The clearest difference is iOS requirement: SunGuard at 15.1 against SolGlow's 17.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. SunGuard sells 1 one-off in-app purchase and SolGlow sells 2 in-app purchases, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

SunGuard ships an update weekly, SolGlow every 10 days. The most recent releases landed on October 4, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SunGuard | SolGlow |
| --- | --- | --- |
| 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 | **Weekly** | Every 10 days |
| Monetization | — | Freemium |
| Size | 52 MB | 10 MB |
| Requires iOS | **15.1** | 17.2 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Patrick Schmutz](https://appshunter.io/developer/1893155691) | [Michael Smith](https://appshunter.io/developer/1893971383) |

## What reviewers say

### SunGuard

[App page](https://appshunter.io/ios/app/sunguard-timer/id6762154189)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SunGuard Pro | $8.99 | one-time |


### 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 | $19.99 | one-time |


## Frequently asked questions

### Is SunGuard free?

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

### Is SolGlow free?

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

### Do SunGuard or SolGlow have ads?

Neither SunGuard nor SolGlow shows ads.

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

SunGuard ships an update weekly, and SolGlow every 10 days. Most recently, SunGuard was updated on October 4, 2026 and SolGlow on October 24, 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.*