# ViewBack vs AUDIO.SYNC

The clearest difference is price: ViewBack at Free against AUDIO.SYNC's $3.99. ViewBack also leads on iOS requirement (11.0 vs 18.6). AUDIO.SYNC's advantage is update cadence (every 7 months vs every 21 months). On ads, in-app purchases and device support there is nothing between them.

ViewBack is free to download; AUDIO.SYNC costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ViewBack ships an update every 21 months, AUDIO.SYNC every 7 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ViewBack | AUDIO.SYNC |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 7 months** |
| Size | 12 MB | 66 MB |
| Requires iOS | **11.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vislink](https://appshunter.io/developer/1263969601) | [Kevin Bolus](https://appshunter.io/developer/1822360740) |

## What reviewers say

### ViewBack

[App page](https://appshunter.io/ios/app/viewback/id1263969602)

**Features:** macOS Compatibility

**In-app purchases:** none


### AUDIO.SYNC

[App page](https://appshunter.io/ios/app/audiosync/id6747685672)

**In-app purchases:** none


## Frequently asked questions

### Is ViewBack free?

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

### Is AUDIO.SYNC free?

AUDIO.SYNC costs $3.99, with no in-app purchases.

### Do ViewBack or AUDIO.SYNC have ads?

Neither ViewBack nor AUDIO.SYNC shows ads.

### Which is updated more often, ViewBack or AUDIO.SYNC?

ViewBack ships an update every 21 months, and AUDIO.SYNC every 7 months. Most recently, ViewBack was updated on October 26, 2026 and AUDIO.SYNC 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.*