# 波動 Hysteric Oscillator vs DIVA EVO

The clearest difference is in-app purchases: DIVA EVO at none against 波動 Hysteric Oscillator's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 波動 Hysteric Oscillator sells 1 one-off in-app purchase. DIVA EVO asks for nothing beyond the download.

波動 Hysteric Oscillator ships an update every 11 days, DIVA EVO fortnightly. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 波動 Hysteric Oscillator | DIVA EVO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (7 ratings)](https://appshunter.io/ios/app/hysteric-oscillator/id1473229854/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 11 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 37 MB |
| Requires iOS | 15.0 | 15 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Toshihiko Arai](https://appshunter.io/developer/415194231) | [Proel](https://appshunter.io/developer/847592386) |

## What reviewers say

### 波動 Hysteric Oscillator

[App page](https://appshunter.io/ios/app/hysteric-oscillator/id1473229854)

Generate test tones and observe real-time waveform changes. Explore frequency, volume, filters, and modulation effects for audio experiments and learning synthesizer basics.

**Highlights:** Generate test tones and drone sounds, Real-time waveform display, Control frequency, volume, and panning, Low-pass filter, AM/FM modulation effects, Two-channel mode (Full Version), Save and recall settings (Full Version)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version | $6.99 | one-time |


### DIVA EVO

[App page](https://appshunter.io/ios/app/diva-evo/id6759630670)

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

**In-app purchases:** none


## Frequently asked questions

### Is 波動 Hysteric Oscillator free?

波動 Hysteric Oscillator is free to download, with in-app purchases available.

### Is DIVA EVO free?

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

### Do 波動 Hysteric Oscillator or DIVA EVO have ads?

Neither 波動 Hysteric Oscillator nor DIVA EVO shows ads.

### Which is updated more often, 波動 Hysteric Oscillator or DIVA EVO?

波動 Hysteric Oscillator ships an update every 11 days, and DIVA EVO fortnightly. Most recently, 波動 Hysteric Oscillator was updated on October 24, 2026 and DIVA EVO on October 11, 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.*