# 二手车 vs 零洞

The clearest difference is ads: 零洞 at none against 二手车's shown. 零洞 also leads on monetization model (free vs free with in-app purchases) and ratings volume (3 vs 1). 二手车's advantage is iOS requirement (13.0 vs 15.0). On price, rating, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for 二手车 against 5.0 for 零洞. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

二手车 ships an update fortnightly, 零洞 every 4 weeks. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 二手车 | 零洞 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/id1156049941/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/ai/id1623316687/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 72.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 4 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 295 MB | 211 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Chaboshi Technology Co., Ltd.](https://appshunter.io/developer/1156049940) | [Nanjing Lingdong Shuzhi Technology Co., Ltd.](https://appshunter.io/developer/1742133287) |

## What reviewers say

### 二手车

[App page](https://appshunter.io/ios/app/id1156049941)

Access comprehensive vehicle history reports, including maintenance records, accident history, and estimated values. Get professional insights and expert consultations to make informed decisions when buying or selling a used car.

**Highlights:** Vehicle history reports, Maintenance record lookup, Accident history analysis, Used car valuation, Professional inspection services, Extended warranty options

**Features:** macOS Compatibility

**In-app purchases:** none


### 零洞

[App page](https://appshunter.io/ios/app/ai/id1623316687)

This app connects and manages your smart home devices, allowing real-time status checks, remote control, and inter-device automation. It extends smart capabilities to your community for seamless access. Designed for ease of use, it offers a personalized smart living experience focused on comfort and convenience.

**Highlights:** Connect and manage smart home devices, Real-time device status monitoring, Remote device control, Inter-device automation, Community access control (gates, parking), Personalized smart space planning, 24/7 home environment monitoring

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

**In-app purchases:** none


## Frequently asked questions

### Is 二手车 free?

二手车 is free to download, with no in-app purchases.

### Is 零洞 free?

零洞 is free to download, with no in-app purchases.

### Which has better reviews, 二手车 or 零洞?

二手车 and 零洞 are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do 二手车 or 零洞 have ads?

二手车 shows ads; 零洞 does not.

### Which is updated more often, 二手车 or 零洞?

二手车 ships an update fortnightly, and 零洞 every 4 weeks. Most recently, 二手车 was updated on October 13, 2026 and 零洞 on October 9, 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.*