Comparison

FourScan vs SmartMemo

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

FourScan

Features
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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.

About

SmartMemo

Features
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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

FourScan3 screens
SmartMemo4 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
FourScan versus SmartMemo: the parameters behind the verdict, then further details
ParameterFourScanSmartMemo
PriceFreeFree
Update frequencyEvery 10 daysβ€”
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad β€” better
Requires iOS16.0 β€” better17.0
Further details β€” not scored
Size3 MB400 MB
Age rating4+4+
Developersatoshi amasakiζ™“ ιƒ­

In-app purchases

None

FourScan

No in-app purchases

None

SmartMemo

No in-app purchases

Questions

Is FourScan free?
FourScan is free to download, with no in-app purchases.
Is SmartMemo free?
SmartMemo is free to download, with no in-app purchases.
Do FourScan or SmartMemo have ads?
Neither FourScan nor SmartMemo shows ads.

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