# Aethyr Waves vs Prelude Therapy prep

The clearest difference is in-app purchases: Prelude Therapy prep at none against Aethyr Waves's 1. Aethyr Waves's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 26.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Aethyr Waves sells 1 in-app purchase, starting at $3.99 per month. Prelude Therapy prep asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Aethyr Waves | Prelude Therapy prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/prelude-therapy-prep/id6761587576/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free |
| Size | 6 MB | 3 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [SEBASTIAN E HERNANDEZ CACERES](https://appshunter.io/developer/1888000839) | [Ugochukwu Nwune](https://appshunter.io/developer/1870001353) |

## What reviewers say

### Aethyr Waves

[App page](https://appshunter.io/ios/app/aethyr-waves/id6761154194)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aethyr Waves Premium | $3.99 | per month |


### Prelude Therapy prep

[App page](https://appshunter.io/ios/app/prelude-therapy-prep/id6761587576)

This AI-powered companion helps you prepare for therapy sessions by providing a private space to reflect on your week. It uses local processing to transcribe your thoughts, identify emotional patterns, and generate session summaries, all without sending your data to the cloud.

**Highlights:** Voice-to-Insight transcription, Session summary generation, Emotional arc visualization, Identification of recurring themes, Local AI processing, No account required

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

**In-app purchases:** none


## Frequently asked questions

### Is Aethyr Waves free?

Aethyr Waves is free to download, with in-app purchases available.

### Is Prelude Therapy prep free?

Prelude Therapy prep is free to download, with no in-app purchases.

### Do Aethyr Waves or Prelude Therapy prep have ads?

Neither Aethyr Waves nor Prelude Therapy prep shows ads.

### Which is updated more often, Aethyr Waves or Prelude Therapy prep?

Aethyr Waves ships an update every 3 weeks, and Prelude Therapy prep every 3 weeks. Most recently, Aethyr Waves was updated on October 25, 2026 and Prelude Therapy prep on October 24, 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.*