# ThunDroid AI vs Vein

The clearest difference is in-app purchases: Vein at none against ThunDroid AI's 1. Vein also leads on update cadence (every 4 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ThunDroid AI sells 1 in-app purchase, starting at $12.99 per month. Vein asks for nothing beyond the download.

ThunDroid AI ships an update every 2 weeks, Vein every 4 days. The most recent releases landed on November 5, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | ThunDroid AI | Vein |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Freemium | — |
| Size | 32 MB | 9 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Aetherrax Technologies](https://appshunter.io/developer/1811867367) | [Baran Gungor](https://appshunter.io/developer/1869837063) |

## 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 |


### Vein

[App page](https://appshunter.io/ios/app/vein-habit-tracker/id6761117243)

**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 Vein free?

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

### Do ThunDroid AI or Vein have ads?

Neither ThunDroid AI nor Vein shows ads.

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

ThunDroid AI ships an update every 2 weeks, and Vein every 4 days. Most recently, ThunDroid AI was updated on November 5, 2026 and Vein on November 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.*