# Fasoo Secure Viewer vs RosterSync

The clearest difference is in-app purchases: Fasoo Secure Viewer at none against RosterSync's 1. Fasoo Secure Viewer also leads on ads (none vs shown) and iOS requirement (15.0 vs 18.0). RosterSync's advantage is update cadence (every 3 days vs every 6 weeks). On price and device support there is nothing between them.

Both are free to download. RosterSync sells 1 one-off in-app purchase. Fasoo Secure Viewer asks for nothing beyond the download.

Fasoo Secure Viewer ships an update every 6 weeks, RosterSync every 3 days. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Fasoo Secure Viewer | RosterSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/rostersync/id6759645143/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 118 MB | 62 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Fasoo AI Co., Ltd.](https://appshunter.io/developer/429136974) | [AeroSync Studio](https://appshunter.io/developer/1888070954) |

## What reviewers say

### Fasoo Secure Viewer

[App page](https://appshunter.io/ios/app/fasoo-secure-viewer/id6478472132)

**In-app purchases:** none


### RosterSync

[App page](https://appshunter.io/ios/app/rostersync/id6759645143)

Manage and share your flight schedules with airline crew. This utility automatically syncs your roster, offers robust security for login credentials, and allows real-time schedule comparison with colleagues. Export your schedule to your native calendar for seamless organization.

**Highlights:** Automated schedule sync, Secure credential storage, Real-time schedule sharing, Cross-comparison with colleagues, Calendar export (iCloud/Google), Privacy permission settings

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro 버전 업그레이드 | $2.99 | one-time |


## Frequently asked questions

### Is Fasoo Secure Viewer free?

Fasoo Secure Viewer is free to download, with no in-app purchases.

### Is RosterSync free?

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

### Do Fasoo Secure Viewer or RosterSync have ads?

RosterSync shows ads; Fasoo Secure Viewer does not.

### Which is updated more often, Fasoo Secure Viewer or RosterSync?

Fasoo Secure Viewer ships an update every 6 weeks, and RosterSync every 3 days. Most recently, Fasoo Secure Viewer was updated on October 10, 2026 and RosterSync on October 12, 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.*