# ThunDroid AI vs EYEON

The clearest difference is price: ThunDroid AI at Free against EYEON's $8.99. EYEON's advantage is in-app purchases (none vs 1) and update cadence (every 6 days vs every 2 weeks). On ads, device support and iOS requirement there is nothing between them.

ThunDroid AI is free to download; EYEON costs $8.99 up front. ThunDroid AI sells 1 in-app purchase, starting at $12.99 per month. EYEON asks for nothing beyond the download.

ThunDroid AI ships an update every 2 weeks, EYEON every 6 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ThunDroid AI | EYEON |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/thundroid-ai/id6746182736/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 6 days** |
| Monetization | Freemium | — |
| Size | 32 MB | 5 MB |
| Requires iOS | **17.6** | 18.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 12+ |
| Developer | [Aetherrax Technologies](https://appshunter.io/developer/1811867367) | [Tomas Pflanzer](https://appshunter.io/developer/445597866) |

## What reviewers say

### ThunDroid AI

[App page](https://appshunter.io/ios/app/thundroid-ai/id6746182736)

This app offers AI-powered mental wellness support, integrating CBT, DBT, and ACT therapy frameworks. It features guided breathing exercises, an intelligent journal, and a live voice mode for real-time interaction, all designed to help manage stress and emotions.

**Highlights:** AI-powered CBT, DBT, ACT therapy frameworks, Stanford-validated cyclic sighing stress reset, 13 guided breathing techniques, Live voice mode for AI interaction, Intelligent journal with 15 templates, On-device AES-256 encryption for privacy

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ThunDroid Membership | $12.99 | per month |


### EYEON

[App page](https://appshunter.io/ios/app/eyeon-train-your-vision/id6757823889)

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

**In-app purchases:** none


## Frequently asked questions

### Is ThunDroid AI free?

ThunDroid AI is free to download, with in-app purchases available.

### Is EYEON free?

EYEON costs $8.99, with no in-app purchases.

### Do ThunDroid AI or EYEON have ads?

Neither ThunDroid AI nor EYEON shows ads.

### Which is updated more often, ThunDroid AI or EYEON?

ThunDroid AI ships an update every 2 weeks, and EYEON every 6 days. Most recently, ThunDroid AI was updated on October 28, 2026 and EYEON on October 25, 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.*