# 悦流 vs Deep

The clearest difference is in-app purchases: 悦流 at none against Deep's 1. 悦流 also leads on iOS requirement (14.0 vs 17.0). Deep's advantage is update cadence (every 2 days vs every 2 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Deep sells 1 one-off in-app purchase. 悦流 asks for nothing beyond the download.

悦流 ships an update every 2 weeks, Deep every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 悦流 | Deep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/deep-ish-answers/id6818376146/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 36 MB | 2 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ocean AI Co., Ltd.](https://appshunter.io/developer/1708513108) | [Hongru Bao](https://appshunter.io/developer/1172098563) |

## What reviewers say

### 悦流

[App page](https://appshunter.io/ios/app/ai/id6467845946)

**In-app purchases:** none


### Deep

[App page](https://appshunter.io/ios/app/deep-ish-answers/id6818376146)

Receive philosophical insights to everyday questions. This app offers a chance to pause, reflect, and gain new perspectives through curated philosophical reflections. A home screen widget provides daily reminders to encourage thoughtful consideration.

**Highlights:** Philosophical answers to user questions, Reflections connected to everyday life, Home screen widget for daily prompts, Encourages pausing and thinking, Shift perspective on life's challenges

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 这个答案很哲 · 无限提问 | $0.99 | one-time |


## Frequently asked questions

### Is 悦流 free?

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

### Is Deep free?

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

### Do 悦流 or Deep have ads?

Neither 悦流 nor Deep shows ads.

### Which is updated more often, 悦流 or Deep?

悦流 ships an update every 2 weeks, and Deep every 2 days. Most recently, 悦流 was updated on November 3, 2026 and Deep on October 31, 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.*