# HBS Smart Lock vs AR Protractor

The clearest difference is in-app purchases: HBS Smart Lock at none against AR Protractor's 1. HBS Smart Lock also leads on iOS requirement (11.0 vs 26.0). AR Protractor's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. AR Protractor sells 1 one-off in-app purchase. HBS Smart Lock asks for nothing beyond the download.

HBS Smart Lock ships an update every 2 months, AR Protractor every 3 weeks. The most recent releases landed on September 17, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | HBS Smart Lock | AR Protractor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 57 MB | 2 MB |
| Requires iOS | **11.0** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Guangdong Jianlanghai Bass Intelligence Technology Co., Ltd.](https://appshunter.io/developer/1823877945) | [晓强 江](https://appshunter.io/developer/6775869180) |

## What reviewers say

### HBS Smart Lock

[App page](https://appshunter.io/ios/app/hbs-smart-lock/id1642250050)

**Features:** macOS Compatibility

**In-app purchases:** none


### AR Protractor

[App page](https://appshunter.io/ios/app/ar-protractor/id6788215923)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features | $4.99 | one-time |


## Frequently asked questions

### Is HBS Smart Lock free?

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

### Is AR Protractor free?

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

### Do HBS Smart Lock or AR Protractor have ads?

HBS Smart Lock shows ads; AR Protractor does not.

### Which is updated more often, HBS Smart Lock or AR Protractor?

HBS Smart Lock ships an update every 2 months, and AR Protractor every 3 weeks. Most recently, HBS Smart Lock was updated on September 17, 2026 and AR Protractor on September 15, 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.*