# 心动回复机 vs Caption AI

The clearest difference is update cadence: 心动回复机 at every 5 days against Caption AI's monthly. 心动回复机 also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. 心动回复机 sells 3 in-app purchases, starting at $6.99 per 7 days and Caption AI sells 4 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

心动回复机 ships an update every 5 days, Caption AI monthly. The most recent releases landed on September 16, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | 心动回复机 | Caption AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Size | 45 MB | 48 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Beijing Zhongguang Zhida Technology Co., Ltd](https://appshunter.io/developer/1812799315) | [Beijing Xingnian Trading Department (Individually Owned Business)](https://appshunter.io/developer/1556019310) |

## What reviewers say

### 心动回复机

[App page](https://appshunter.io/ios/app/and-ai/id6748223575)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Discounted Members | $6.99 | per 7 days |
| 年会员 | $39.99 | per year |
| 永久会员 | $19.99 | one-time |


### Caption AI

[App page](https://appshunter.io/ios/app/caption-ai-subtitle-maker/id6760328167)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Monthly | $3.99 | per month |
| Annual | $14.99 | per year |
| Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is 心动回复机 free?

心动回复机 is free to download, with in-app purchases available.

### Is Caption AI free?

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

### Do 心动回复机 or Caption AI have ads?

Neither 心动回复机 nor Caption AI shows ads.

### Which is updated more often, 心动回复机 or Caption AI?

心动回复机 ships an update every 5 days, and Caption AI monthly. Most recently, 心动回复机 was updated on September 16, 2026 and Caption AI on September 26, 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.*