RF 4DAT vs PicShield

RF 4DAT helps you understand how much RF activity is around you using on-device Bluetooth scanning. See live device counts, review history by location, and keep it all in clear, simple screens. RF 4DAT is free to download, and scanning is free forever. Free features: - Live RF device counts with manual scan control - Location-tagged history (manual or auto-detected) - Protect: a curated guide to RF detection, measurement, and shielding gear - Legal and ethical use guidance built in RF 4DAT Pro (one-time in-app purchase): - Trends: averages, recent changes, most-scanned places, and common devices - CSV export of your scan history Bought RF 4DAT when it was a paid app? Pro is included automatically — there is nothing to buy again. Tap Restore Purchases in Settings if it doesn't appear. Privacy: the 4DAT method Your scans stay on your device. RF 4DAT does not collect, sell, or share your data, and there is no analytics or tracking. Location, when you allow it, is used on-device only to label a scan with a place name; coordinates are never stored. Please use RF 4DAT only where you have permission and legal authority. It is not for stalking, covert surveillance, or identifying people. Device counts are estimates of nearby signals, not identifications of individuals. As an Amazon Associate, RF 4DAT earns from qualifying purchases made through links in the Protect tab. Prices and availability are set by Amazon.

PicShield - 100% On-Device ID Watermark & Photo Privacy Eraser】 PicShield (图盾) is a professional iOS privacy utility designed to protect your sensitive ID documents and photo metadata. Whether you are submitting ID copies for loans, rentals, visa applications, or sharing everyday photos on social media, PicShield keeps your identity safe. 【KEY FEATURES】 1. Smart ID Text Redaction Powered by Apple Vision on-device AI engine to auto-detect and blur sensitive info including ID numbers, phone numbers, and full names with single-color masks, Gaussian blur, or pixelated mosaic. 2. Multi-Page ID Card Stitching Seamlessly auto-align 1 to 4 ID card photos into standard vertical or horizontal collage layouts. 3. Fullscreen Anti-Theft Watermarking Fully customize text, font size, opacity, rotation angle, grid tiling, and outline strokes to prevent unauthorized reuse or copying. 4. EXIF & GPS Location Scrubber Photos often embed precise GPS latitude/longitude and device serial numbers. PicShield automatically wipes all sensitive EXIF metadata upon export to safeguard your residential privacy. 5. High-Quality Lossless Compression Save 60% to 90% storage space with our intelligent quantization compressor while keeping crisp visual detail for fast sharing. 【100% OFFLINE PRIVACY PROMISE】 All image processing runs 100% locally in your iPhone's hardware sandbox. Zero network upload. Zero data tracking. Support & Inquiries: caifengtai@fptkeji.com