# Lightning Headset Test vs Discovery AUv3 Synth

The clearest difference is price: Lightning Headset Test at Free against Discovery AUv3 Synth's $19.99. Lightning Headset Test also leads on iOS requirement (9.3 vs 15.0). Discovery AUv3 Synth's advantage is update cadence (weekly vs every 7 months) and chart position (#191 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Lightning Headset Test is free to download; Discovery AUv3 Synth costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Lightning Headset Test ships an update every 7 months, Discovery AUv3 Synth weekly. The most recent releases landed on September 10, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Lightning Headset Test | Discovery AUv3 Synth |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/discovery-auv3-synth/id6695741686/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | — | Paid |
| Best chart rank | — | **#191** |
| Size | 4 MB | 42 MB |
| Requires iOS | **9.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou Crysound Electronics Co., Ltd.](https://appshunter.io/developer/1204067982) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### Lightning Headset Test

[App page](https://appshunter.io/ios/app/lightning-headset-test/id1204067983)

**Features:** macOS Compatibility

**In-app purchases:** none


### Discovery AUv3 Synth

[App page](https://appshunter.io/ios/app/discovery-auv3-synth/id6695741686)

**Currently charting:** #191 Top Paid · Music (US App Store)

This powerful virtual analog synthesizer offers a vast sound library and advanced features for musicians and sound designers. Create complex sounds with multi-layering, morphing parameters, and built-in effects. Import classic synth patches and utilize rhythmic tools for unique sonic exploration.

**Highlights:** 4 Layers Per Patch, Over 3,500 Presets, Nord Lead 2 Patch Import, Parameter Morphing, Built-in Effects (Chorus, Phaser, Delay), Advanced Filters (8 types), Gate and Arpeggiator

**In-app purchases:** none


## Frequently asked questions

### Is Lightning Headset Test free?

Lightning Headset Test is free to download, with no in-app purchases.

### Is Discovery AUv3 Synth free?

Discovery AUv3 Synth costs $19.99, with no in-app purchases.

### Do Lightning Headset Test or Discovery AUv3 Synth have ads?

Neither Lightning Headset Test nor Discovery AUv3 Synth shows ads.

### Which is updated more often, Lightning Headset Test or Discovery AUv3 Synth?

Lightning Headset Test ships an update every 7 months, and Discovery AUv3 Synth weekly. Most recently, Lightning Headset Test was updated on September 10, 2026 and Discovery AUv3 Synth on September 18, 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.*