# Sun Day Tracker vs BetterLife AI Coach

The clearest difference is in-app purchases: Sun Day Tracker at none against BetterLife AI Coach's 3. Sun Day Tracker also leads on iOS requirement (17.0 vs 26.2). BetterLife AI Coach's advantage is update cadence (weekly vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. BetterLife AI Coach sells 3 in-app purchases, starting at $8.99 per month. Sun Day Tracker asks for nothing beyond the download.

Sun Day Tracker ships an update monthly, BetterLife AI Coach weekly. Both last shipped on November 5, 2026.

## The numbers

| Metric | Sun Day Tracker | BetterLife AI Coach |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (28 ratings)](https://appshunter.io/ios/app/sun-day-tracker/id6748545544/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free | — |
| Size | 1 MB | 14 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [permissionless tech, llc](https://appshunter.io/developer/1824145893) | [JORG PEETZ](https://appshunter.io/developer/6773072168) |

## What reviewers say

### Sun Day Tracker

[App page](https://appshunter.io/ios/app/sun-day-tracker/id6748545544)

Monitor your daily vitamin D absorption from sunlight exposure. This straightforward application helps you keep track of your sun-related vitamin D intake.

**Highlights:** Track daily vitamin D intake, Sunlight exposure monitoring, Simple interface, Daily tracking

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

**In-app purchases:** none


### BetterLife AI Coach

[App page](https://appshunter.io/ios/app/betterlife-ai-coach/id6773072166)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Sprint | $8.99 | per month |
| Annual Sprint | $79.99 | per year |
| Lifetime Ownership | $149.99 | one-time |


## Frequently asked questions

### Is Sun Day Tracker free?

Sun Day Tracker is free to download, with no in-app purchases.

### Is BetterLife AI Coach free?

BetterLife AI Coach is free to download, with in-app purchases available.

### Do Sun Day Tracker or BetterLife AI Coach have ads?

Neither Sun Day Tracker nor BetterLife AI Coach shows ads.

### Which is updated more often, Sun Day Tracker or BetterLife AI Coach?

Sun Day Tracker ships an update monthly, and BetterLife AI Coach weekly. Most recently, Sun Day Tracker was updated on November 5, 2026 and BetterLife AI Coach on November 5, 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.*