# SunSync vs Sunshine D3

The clearest difference is in-app purchases: Sunshine D3 at none against SunSync's 2. Sunshine D3 also leads on iOS requirement (15.0 vs 17.6). SunSync's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). On price and device support there is nothing between them.

Both are free to download. SunSync sells 2 in-app purchases, starting at $1.99 per year. Sunshine D3 asks for nothing beyond the download.

SunSync ships an update every 3 weeks, Sunshine D3 every 4 months. The most recent releases landed on September 25, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | SunSync | Sunshine D3 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Size | 22 MB | 9 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Marta Rodriguez](https://appshunter.io/developer/1873973295) | [Ihsan Gercelman](https://appshunter.io/developer/1895469057) |

## What reviewers say

### SunSync

[App page](https://appshunter.io/ios/app/sunsync-circadian-tracker/id6762293528)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Year | $1.99 | per year |
| Lifetime | $2.99 | one-time |


### Sunshine D3

[App page](https://appshunter.io/ios/app/sunshine-d3/id6766470179)

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

**In-app purchases:** none


## Frequently asked questions

### Is SunSync free?

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

### Is Sunshine D3 free?

Sunshine D3 is free to download, with no in-app purchases.

### Do SunSync or Sunshine D3 have ads?

Sunshine D3 shows ads; SunSync does not.

### Which is updated more often, SunSync or Sunshine D3?

SunSync ships an update every 3 weeks, and Sunshine D3 every 4 months. Most recently, SunSync was updated on September 25, 2026 and Sunshine D3 on October 17, 2026.

---

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