# Fastly vs SunSync

The clearest difference is update cadence: SunSync at fortnightly against Fastly's every 6 weeks. SunSync also leads on device support (3 vs 1). Fastly's advantage is iOS requirement (16.6 vs 18.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Fastly sells 2 in-app purchases, starting at $1.99 per month and SunSync sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Fastly ships an update every 6 weeks, SunSync fortnightly. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Fastly | SunSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (4 ratings)](https://appshunter.io/ios/app/sunsync-sunscreen-reminder/id6779470861/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | — | Freemium |
| Size | 53 MB | 30 MB |
| Requires iOS | **16.6** | 18.6 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Joe Jeyaseelan](https://appshunter.io/developer/1691268023) | [Samuel Araya](https://appshunter.io/developer/1891843842) |

## What reviewers say

### Fastly

[App page](https://appshunter.io/ios/app/fastly-simple-fasting-tracker/id6759859806)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| English | $1.99 | per month |
| English | $5.99 | one-time |


### SunSync

[App page](https://appshunter.io/ios/app/sunsync-sunscreen-reminder/id6779470861)

This app helps you stay safe in the sun by providing local UV index information, smart sunscreen reapplication timers, and gentle reminders. It personalizes your sun protection based on your skin type and activity, turning sun safety into a simple daily ritual.

**Highlights:** Local UV index readings, Smart sunscreen reapply timer, Personalized sun protection, Gentle reapply reminders, UV alerts with quiet hours, Home/Lock Screen UV widget

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SunSync Plus Monthly | $1.99 | per month |
| SunSync Plus Yearly | $14.99 | per year |


## Frequently asked questions

### Is Fastly free?

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

### Is SunSync free?

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

### Do Fastly or SunSync have ads?

Neither Fastly nor SunSync shows ads.

### Which is updated more often, Fastly or SunSync?

Fastly ships an update every 6 weeks, and SunSync fortnightly. Most recently, Fastly was updated on October 26, 2026 and SunSync on October 25, 2026.

---

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