# AV Flash Sync vs RTS Edge

The clearest difference is rating: RTS Edge at 5.0 against AV Flash Sync's 1.0. RTS Edge also leads on in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 19 months). AV Flash Sync's advantage is iOS requirement (12.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. AV Flash Sync sells 1 one-off in-app purchase. RTS Edge asks for nothing beyond the download.

RTS Edge holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

AV Flash Sync ships an update every 19 months, RTS Edge every 3 weeks. The most recent releases landed on September 24, 2026 and August 8, 2026 respectively.

## The numbers

| Metric | AV Flash Sync | RTS Edge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/av-flash-sync/id1207980707/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/rts-edge/id6743207224/reviews)** |
| Number of ratings | 1 | **3** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 1 MB | 59 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [náhodný](https://appshunter.io/developer/431797361) | [Keenfinity](https://appshunter.io/developer/1852206002) |

## What reviewers say

### AV Flash Sync

[App page](https://appshunter.io/ios/app/av-flash-sync/id1207980707)

Enhance your AV media recordings with a one-second tone and red flash. This tool aids in synchronizing audio and video during post-production, streamlining your workflow.

**Highlights:** Add one-second tone, Add red flash, Synchronize audio and video, Post-production tool, Media recording enhancement

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flash Sync Pro | $2.99 | one-time |


### RTS Edge

[App page](https://appshunter.io/ios/app/rts-edge/id6743207224)

Transform your device into a portable key panel for a cloud-based intercom system. This app offers seamless connectivity and control for broadcasters and audio professionals, ideal for remote production and live events.

**Highlights:** Portable key panel functionality, Seamless cloud-based intercom connectivity, Remote production support, Live broadcast environment use, Event management tool, Collaborative media workflows

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

**In-app purchases:** none


## Frequently asked questions

### Is AV Flash Sync free?

AV Flash Sync is free to download, with in-app purchases available.

### Is RTS Edge free?

RTS Edge is free to download, with no in-app purchases.

### Which has better reviews, AV Flash Sync or RTS Edge?

RTS Edge is rated higher. AV Flash Sync averages 1.0 out of 5 from 1 ratings, while RTS Edge averages 5.0 from 3 ratings.

### Do AV Flash Sync or RTS Edge have ads?

Neither AV Flash Sync nor RTS Edge shows ads.

### Which is updated more often, AV Flash Sync or RTS Edge?

AV Flash Sync ships an update every 19 months, and RTS Edge every 3 weeks. Most recently, AV Flash Sync was updated on September 24, 2026 and RTS Edge on August 8, 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.*