# ThunDroid AI vs Winnow

The clearest difference is update cadence: ThunDroid AI at every 2 weeks against Winnow's every 6 weeks. Winnow's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. ThunDroid AI sells 1 in-app purchase, starting at $12.99 per month and Winnow sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ThunDroid AI ships an update every 2 weeks, Winnow every 6 weeks. Both last shipped on November 5, 2026.

## The numbers

| Metric | ThunDroid AI | Winnow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/winnow-cbt-journal/id6760937535/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | Freemium | Freemium |
| Size | 32 MB | 48 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Aetherrax Technologies](https://appshunter.io/developer/1811867367) | [PsyFi Technologies](https://appshunter.io/developer/1859462854) |

## 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 |


### Winnow

[App page](https://appshunter.io/ios/app/winnow-cbt-journal/id6760937535)

This app helps you understand and manage your thoughts using Cognitive Behavioral Therapy (CBT) techniques. Engage in daily practice, guided thought records, and mood tracking to improve your mental well-being. Share insights with your therapist or reflect on your progress privately.

**Highlights:** Daily CBT practice lessons, Guided 7-step thought records, Quick mood check-ins, Journal and reflection tools, PDF export for therapists, Mood and distortion insights, Personalized safety plan

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Winnow Pro Monthly | $4.99 | per month |
| Winnow Pro Annual | $39.99 | per year |


## Frequently asked questions

### Is ThunDroid AI free?

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

### Is Winnow free?

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

### Do ThunDroid AI or Winnow have ads?

Neither ThunDroid AI nor Winnow shows ads.

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

ThunDroid AI ships an update every 2 weeks, and Winnow every 6 weeks. Most recently, ThunDroid AI was updated on November 5, 2026 and Winnow on November 5, 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.*