# VoiceViewer vs FormantScope

The clearest difference is iOS requirement: VoiceViewer at 15.0 against FormantScope's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | VoiceViewer | FormantScope |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 6 weeks |
| Size | 14 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [晓亮 敬](https://appshunter.io/developer/1753623105) | [跃然 王](https://appshunter.io/developer/1895682344) |

## What reviewers say

### VoiceViewer

[App page](https://appshunter.io/ios/app/voiceviewer/id6504754605)

**Features:** macOS Compatibility

**In-app purchases:** none


### FormantScope

[App page](https://appshunter.io/ios/app/formantscope/id6764803567)

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

**In-app purchases:** none


## Frequently asked questions

### Is VoiceViewer free?

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

### Is FormantScope free?

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

### Do VoiceViewer or FormantScope have ads?

Neither VoiceViewer nor FormantScope shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*