# Dual Screen Sync vs Peekside

The clearest difference is in-app purchases: Dual Screen Sync at none against Peekside's 1. Peekside's advantage is update cadence (every 2 days vs every 3 weeks) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Peekside sells 1 one-off in-app purchase. Dual Screen Sync asks for nothing beyond the download.

Dual Screen Sync ships an update every 3 weeks, Peekside every 2 days. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Dual Screen Sync | Peekside |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 1 MB | 9 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Insik Shin](https://appshunter.io/developer/1740272742) | [RoxyKovu LLC](https://appshunter.io/developer/1816071699) |

## What reviewers say

### Dual Screen Sync

[App page](https://appshunter.io/ios/app/dual-screen-sync/id6737029339)

**In-app purchases:** none


### Peekside

[App page](https://appshunter.io/ios/app/peekside-screen-mirroring/id6794650892)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Peekside Pro | $4.99 | one-time |


## Frequently asked questions

### Is Dual Screen Sync free?

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

### Is Peekside free?

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

### Do Dual Screen Sync or Peekside have ads?

Neither Dual Screen Sync nor Peekside shows ads.

### Which is updated more often, Dual Screen Sync or Peekside?

Dual Screen Sync ships an update every 3 weeks, and Peekside every 2 days. Most recently, Dual Screen Sync was updated on September 10, 2026 and Peekside on September 17, 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.*