FourScan vs SmartMemo
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
FourScan
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Protect your privacy with 4 scanning technologies. Worried about hidden cameras or listening devices in hotels, Airbnbs, or rental spaces? FourScan runs 4 detection scans sequentially with a single tap. [4 Detection Powers] 1. Magnetic Scan - Detects magnetic field anomalies from electronic devices 2. Infrared Scan - Uses front camera to detect IR LEDs from night vision cameras 3. Wi-Fi Scan - Discovers suspicious devices on the local network 4. Bluetooth Scan - Searches and analyzes nearby BLE devices Note: Basic checking tool, not a substitute for professional investigation.
SmartMemo
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SmartMemo redefines how you capture tasks. Powered by on-device AI, it lets you create TODO items the way that feels most natural β type, speak, or snap a photo. KEY FEATURES: VOICE INPUT β’ Real-time speech-to-text using Apple Speech framework β’ Simply tap the mic and speak your task β it's transcribed instantly β’ Works in Chinese and English PHOTO RECOGNITION β’ Point your camera at a whiteboard, sticky note, or any text β’ Apple Vision OCR extracts text in under 2 seconds β’ MiniCPM-V on-device multimodal AI analyzes the image and suggests a smart TODO description ON-DEVICE AI β 100% PRIVATE β’ Powered by llama.cpp with Metal GPU acceleration β’ MiniCPM-V runs entirely on your device β no cloud, no servers, no data leakage β’ Streaming token output so you see the AI thinking in real time SMART TODO LIST β’ Color-coded tags: Work, Life, Study, Other β’ Swipe to delete, tap to complete β’ Real-time search filtering β’ Creation source badges (text / voice / photo) PRIVACY FIRST β’ All AI inference happens locally on your device β’ No account required, no ads, no tracking Perfect for students, professionals, and anyone who values both productivity and privacy.
Screenshots
Verdict
FourScan and SmartMemo are too close to call on the numbers: across 5 compared parameters β price, ads, in-app purchases and device support among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | FourScan | SmartMemo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | β |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad β better |
| Requires iOS | 16.0 β better | 17.0 |
| Further details β not scored | ||
| Size | 3 MB | 400 MB |
| Age rating | 4+ | 4+ |
| Developer | satoshi amasaki | ζ ι |
In-app purchases
FourScan
No in-app purchases
SmartMemo
No in-app purchases
Questions
Is FourScan free?
Is SmartMemo free?
Do FourScan or SmartMemo have ads?
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