# KSTAR Sync vs SeifGuard

The clearest difference is in-app purchases: KSTAR Sync at none against SeifGuard's 2. KSTAR Sync also leads on iOS requirement (14.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SeifGuard sells 2 in-app purchases, starting at $4.99 per month. KSTAR Sync asks for nothing beyond the download.

KSTAR Sync ships an update every 2 weeks, SeifGuard fortnightly. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | KSTAR Sync | SeifGuard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Size | 74 MB | 46 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Kstar Science & Technology Co., Ltd.](https://appshunter.io/developer/1460236605) | [seifguard](https://appshunter.io/developer/1878658542) |

## What reviewers say

### KSTAR Sync

[App page](https://appshunter.io/ios/app/kstar-sync/id6754310380)

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

**In-app purchases:** none


### SeifGuard

[App page](https://appshunter.io/ios/app/seifguard-app-blocker/id6759449449)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $29.99 | per year |


## Frequently asked questions

### Is KSTAR Sync free?

KSTAR Sync is free to download, with no in-app purchases.

### Is SeifGuard free?

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

### Do KSTAR Sync or SeifGuard have ads?

Neither KSTAR Sync nor SeifGuard shows ads.

### Which is updated more often, KSTAR Sync or SeifGuard?

KSTAR Sync ships an update every 2 weeks, and SeifGuard fortnightly. Most recently, KSTAR Sync was updated on October 2, 2026 and SeifGuard on October 9, 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.*