# OffShift vs SolGlow

The clearest difference is update cadence: SolGlow at every 10 days against OffShift's every 3 weeks. SolGlow also leads on iOS requirement (17.2 vs 26.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. OffShift sells 2 in-app purchases, starting at $3.99 per month 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.

OffShift ships an update every 3 weeks, SolGlow every 10 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OffShift | 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 | Every 3 weeks | **Every 10 days** |
| Monetization | — | Freemium |
| Size | 3 MB | 10 MB |
| Requires iOS | 26.1 | **17.2** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [JONATHAN ALEXANDER WRIGHT](https://appshunter.io/developer/1853376663) | [Michael Smith](https://appshunter.io/developer/1893971383) |

## What reviewers say

### OffShift

[App page](https://appshunter.io/ios/app/offshift-shift-work-sleep/id6756209316)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OffShift Pro Monthly | $3.99 | per month |
| OffShift Pro Yearly | $29.99 | per year |


### 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 OffShift free?

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

### Is SolGlow free?

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

### Do OffShift or SolGlow have ads?

Neither OffShift nor SolGlow shows ads.

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

OffShift ships an update every 3 weeks, and SolGlow every 10 days. Most recently, OffShift was updated on October 28, 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.*