# 3i vs Lockin Smart

The clearest difference is rating: 3i at 4.9 against Lockin Smart's 3.2. 3i also leads on review sentiment (72% vs 42%) and ratings volume (351 vs 29). On price, update cadence, ads 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.

3i holds the better App Store score, 4.9 against 3.2. That said, the two scores are not equally well evidenced: 3i has 351 ratings behind it against 29, so its average is the more settled of the two. Written reviews point the same way: 72% of 3i's written reviews are positive against 42% of Lockin Smart's.

3i ships an update every 11 days, Lockin Smart every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | 3i | Lockin Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (351 ratings)](https://appshunter.io/ios/app/3i/id1625845488/reviews)** | [3.2 (29 ratings)](https://appshunter.io/ios/app/lockin-smart/id6739702442/reviews) |
| Number of ratings | **351** | 29 |
| Positive reviews | **72.2% of reviews** | 41.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 279 MB | 286 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [深圳市杉川智能科技有限公司](https://appshunter.io/developer/1680092577) | [LOCKIN (U.S.) INC.](https://appshunter.io/developer/1502077789) |

## What reviewers say

### 3i

[App page](https://appshunter.io/ios/app/3i/id1625845488)

Easily connect and control your smart devices from your mobile phone. Manage settings, schedule tasks, and monitor device status remotely. Enjoy firmware updates and share device access with family.

**Highlights:** Remote control and setup, Real-time status view, Schedule automated tasks, Do not disturb mode, Firmware upgrades, Share device access

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

**In-app purchases:** none


### Lockin Smart

[App page](https://appshunter.io/ios/app/lockin-smart/id6739702442)

This app simplifies keyless living by allowing you to unlock your door using various biometric methods or passcodes. Remotely manage access, see visitors, and receive important alerts, all while integrating with your smart home ecosystem.

**Highlights:** Keyless entry via face, fingerprint, palm vein, passcode, or phone, Remote lock/unlock and visitor management, Two-way voice intercom, Real-time alerts for events, Smart home integration (Matter, Alexa, Google Home), On-device biometric data storage

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

**In-app purchases:** none


## Frequently asked questions

### Is 3i free?

3i is free to download, with no in-app purchases.

### Is Lockin Smart free?

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

### Which has better reviews, 3i or Lockin Smart?

3i is rated higher. 3i averages 4.9 out of 5 from 351 ratings, while Lockin Smart averages 3.2 from 29 ratings.

### Do 3i or Lockin Smart have ads?

Neither 3i nor Lockin Smart shows ads.

### Which is updated more often, 3i or Lockin Smart?

3i ships an update every 11 days, and Lockin Smart every 3 weeks. Most recently, 3i was updated on November 3, 2026 and Lockin Smart on November 4, 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.*