# 心动轨迹 vs 密度空间

The clearest difference is ads: 心动轨迹 at none against 密度空间's shown. 心动轨迹 also leads on review sentiment (100% vs 75%). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. 心动轨迹 sells 8 in-app purchases, starting at $3.99 per month and 密度空间 sells 8 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

心动轨迹 ships an update fortnightly, 密度空间 weekly. Both last shipped on November 3, 2026.

## The numbers

| Metric | 心动轨迹 | 密度空间 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (40 ratings)](https://appshunter.io/ios/app/id6463597411/reviews)** |
| Number of ratings | — | **40** |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 92 MB | 194 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [绵阳市简艺轩科技有限公司](https://appshunter.io/developer/1687595533) | [UU Momentum Network Technology Co., Ltd.](https://appshunter.io/developer/1093451680) |

## What reviewers say

### 心动轨迹

[App page](https://appshunter.io/ios/app/id6449054813)

This app automatically records and shares location history, offering real-time tracking and arrival/departure alerts for couples and close friends. It also includes features like a mood diary, simulated calls, and an emergency alarm.

**Highlights:** Real-time location sharing, Full-day trip recording, Arrival and departure alerts, Low battery notifications, Mood diary, Simulated calls and chats, Emergency alarm

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 无忧月会员 | $3.99 | per month |
| 尊享周会员 | $7.99 | per 7 days |
| 无忧季会员 | $9.99 | per 3 months |
| 无忧年会员 | $14.99 | per year |
| 尊享月会员 | $14.99 | per month |
| 尊享季会员 | $19.99 | per 3 months |
| 尊享年会员 | $39.99 | per year |
| 心动年会员 | $59.99 | per year |


### 密度空间

[App page](https://appshunter.io/ios/app/id6463597411)

This app offers real-time location sharing and walkie-talkie functionality for family and friends. Stay connected with instant voice messages and always know where your loved ones are on a map.

**Highlights:** Real-time location sharing, Walkie-talkie functionality, Arrival/departure notifications, Location history tracking, Battery level and status updates, Optimized for battery saving

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 密度空间VIP连续包周 | $0.99 | per 7 days |
| 密度空间包月VIP | $2.99 | per month |
| 密度空间月VIP | $2.99 | per month |
| 密度空间VIP连续包月 | $2.99 | per month |
| 密度空间季度VIP | $5.99 | per 3 months |
| 密度空间年VIP | $17.99 | per year |
| 密度空间VIP连续包年 | $17.99 | per year |
| 密度空间永久VIP | $59.99 | one-time |


## Frequently asked questions

### Is 心动轨迹 free?

心动轨迹 is free to download, with in-app purchases available.

### Is 密度空间 free?

密度空间 is free to download, with in-app purchases available.

### Do 心动轨迹 or 密度空间 have ads?

密度空间 shows ads; 心动轨迹 does not.

### Which is updated more often, 心动轨迹 or 密度空间?

心动轨迹 ships an update fortnightly, and 密度空间 weekly. Most recently, 心动轨迹 was updated on November 3, 2026 and 密度空间 on November 3, 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.*