KD Lock vs SmartScan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KD Lock
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A mobile client used to control Kuodao IoT Super Lock. It can remotely open and close Kuodao IoT smart locks, remotely set the smart lock's door opening card and password, and view real-time door opening events.
SmartScan
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.
- 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
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SmartScan – Ultimate Scanner & Study Companion Transform your smartphone into the smartest scanner and study assistant! Perfect for homework, nature exploration, and everyday object identification. NEW: AI-Powered Academic Solver • Complete Subject Coverage: Math, Physics, Chemistry, Biology, Literature, Languages, Economics, History, Geometry - from elementary to university level • Instant Problem Recognition: Snap a photo of homework and get step-by-step solutions in seconds • Deep Explanations: Comprehensive breakdowns to help you understand concepts • 30+ Languages: Solve problems in multiple languages Recognition Library (100,000+ Items) • Nature: Flowers, Plants, Trees, Mushrooms, Insects, Birds, Fish, Animals, Rocks, Minerals • Academic: Mathematical equations, scientific formulas, laboratory equipment • Practical: Food identification, Coins, Banknotes, Watches, Safety/allergen detection • Documents: QR/Barcode scanning, text extraction from images Smart Features • One-Tap Results: Point, shoot, get instant answers • Document Scanning: Extract and translate text, convert handwritten notes • Offline Capability: Core features work without internet • Social Sharing: Facebook, Twitter, Instagram integration • Study Cards: Create reference materials from findings Perfect For: • Students: Complete homework helper across all subjects • Parents: Assist children with studies and curious questions • Nature Enthusiasts: Identify plants, animals, geological features • Travelers: Understand local foods, landmarks, cultural items • Professionals: Digitize documents and extract information SmartScan Premium - $2.99/month • Unlimited scans and problem solving • Ad-free experience • Priority AI processing • Advanced study features • Expert support access Pricing for US customers. Varies by region, converted to local currency. Payment charged to iTunes Account upon confirmation. Auto-renewal can be disabled 24 hours before current period ends. Manage through iTunes Account settings. Support: https://support.apple.com/HT202039 Download SmartScan today and never struggle with homework again! Contact: dev@romancedawn.io Privacy: https://romancedawn.io/privacy-policy/ Terms: https://romancedawn.io/terms-of-services/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | KD Lock | SmartScan |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.0 (4 ratings) — better |
| Positive reviews | — | 25.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 6 weeks | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 26 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Guangzhou Kuodao Internet of Things Technology Co., Ltd. | 智清 秦 |
In-app purchases
KD Lock
No in-app purchases
SmartScan
- Smart Scan Monthly Pro$2.491 Month
- Monthly Premium7 Days trial$2.991 Month
- Smart Scan Yearly Pro7 Days trial$24.991 Year
