# KD Lock vs SmartScan

The clearest difference is in-app purchases: KD Lock at none against SmartScan's 3. KD Lock also leads on iOS requirement (12.0 vs 18.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SmartScan sells 3 in-app purchases, starting at $2.49 per month. KD Lock asks for nothing beyond the download.

KD Lock ships an update every 6 weeks, SmartScan every 5 weeks. The most recent releases landed on October 29, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | KD Lock | SmartScan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (4 ratings)](https://appshunter.io/ios/app/smartscan-all-in-one-scanner/id1478642470/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | — | Freemium |
| Size | 26 MB | 25 MB |
| Requires iOS | **12.0** | 18.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Kuodao Internet of Things Technology Co., Ltd.](https://appshunter.io/developer/1196125665) | [智清 秦](https://appshunter.io/developer/1827678463) |

## What reviewers say

### KD Lock

[App page](https://appshunter.io/ios/app/kd-lock/id1196125666)

**Features:** macOS Compatibility

**In-app purchases:** none


### SmartScan

[App page](https://appshunter.io/ios/app/smartscan-all-in-one-scanner/id1478642470)

This app transforms your phone into a powerful scanner and study assistant. It offers AI-powered solutions for academic problems across various subjects and can identify over 100,000 items in nature, academic settings, and everyday life.

**Highlights:** AI-powered academic solver, Instant problem recognition with step-by-step solutions, Identify over 100,000 items (nature, academic, practical), Document scanning and text extraction, Offline capability for core features, Create study cards from findings

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Smart Scan Monthly Pro | $2.49 | per month |
| Monthly Premium | $2.99 | per month |
| Smart Scan Yearly Pro | $24.99 | per year |


## Frequently asked questions

### Is KD Lock free?

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

### Is SmartScan free?

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

### Do KD Lock or SmartScan have ads?

Neither KD Lock nor SmartScan shows ads.

### Which is updated more often, KD Lock or SmartScan?

KD Lock ships an update every 6 weeks, and SmartScan every 5 weeks. Most recently, KD Lock was updated on October 29, 2026 and SmartScan 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.*