# I Will Train Today vs Vitamin D Sun Tracker

The clearest difference is in-app purchases: I Will Train Today at none against Vitamin D Sun Tracker's 4. I Will Train Today also leads on rating (5.0 vs 4.8). Vitamin D Sun Tracker's advantage is update cadence (weekly vs monthly) and ratings volume (30 vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Vitamin D Sun Tracker sells 4 in-app purchases, starting at $4.99 per month. I Will Train Today asks for nothing beyond the download.

I Will Train Today holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Vitamin D Sun Tracker has 30 ratings behind it against 2, so its average is the more settled of the two.

I Will Train Today ships an update monthly, Vitamin D Sun Tracker weekly. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | I Will Train Today | Vitamin D Sun Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/i-will-train-today/id6463777091/reviews)** | [4.8 (30 ratings)](https://appshunter.io/ios/app/vitamin-d-sun-tracker-bask/id6758405235/reviews) |
| Number of ratings | 2 | **30** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 42 MB | 42 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [I Will Train, LLC (USA)](https://appshunter.io/developer/1704967394) | [Greycloud LLC](https://appshunter.io/developer/1767904895) |

## What reviewers say

### I Will Train Today

[App page](https://appshunter.io/ios/app/i-will-train-today/id6463777091)

This app helps clients of a specific fitness program stay on track with healthy habits. It sends reminders and prompts users to confirm compliance with their coach's directives. It also integrates with Apple Health to import activity data.

**Highlights:** Habit compliance reminders, Coach-assigned healthy habits, Yes/No compliance prompts, HealthKit activity data import, Push notifications

**Features:** macOS Compatibility

**In-app purchases:** none


### Vitamin D Sun Tracker

[App page](https://appshunter.io/ios/app/vitamin-d-sun-tracker-bask/id6758405235)

This app estimates your Vitamin D intake from sun exposure and supplements. It provides real-time UV index, weather, and personalized guidance on optimal sun times and duration to prevent sunburn. Track your progress with historical data and insights.

**Highlights:** Real-time Vitamin D estimates, Live UV Index and weather integration, Personalized sun timer with sunburn guidance, 48-hour UV forecast for optimal exposure, Supplement and cofactor tracking, Historical data and trend analysis, Optional Apple Health integration

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $24.99 | per year |
| Yearly | $29.99 | per year |
| Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is I Will Train Today free?

I Will Train Today is free to download, with no in-app purchases.

### Is Vitamin D Sun Tracker free?

Vitamin D Sun Tracker is free to download, with in-app purchases available.

### Which has better reviews, I Will Train Today or Vitamin D Sun Tracker?

I Will Train Today is rated higher. I Will Train Today averages 5.0 out of 5 from 2 ratings, while Vitamin D Sun Tracker averages 4.8 from 30 ratings.

### Do I Will Train Today or Vitamin D Sun Tracker have ads?

Neither I Will Train Today nor Vitamin D Sun Tracker shows ads.

### Which is updated more often, I Will Train Today or Vitamin D Sun Tracker?

I Will Train Today ships an update monthly, and Vitamin D Sun Tracker weekly. Most recently, I Will Train Today was updated on November 3, 2026 and Vitamin D Sun Tracker on November 9, 2026.

---

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