Local-First Processing
What can be done locally stays local. We work to ensure your raw data never leaves your device and never touches our servers.
Privacy is the Core Logic of Our Products
We prioritize local-first processing, data minimization, and absolute transparency. This hub provides direct access to the privacy policies of all Efficient Lab products, ensuring you stay in control of your digital boundaries.
Our Privacy Commitments
Our Privacy Commitments
We don't just follow the rules; we build privacy directly into our logic from day one, ensuring your data is handled with care.
Minimal Data Footprint
Operating through minimal necessary permissions. We are extremely cautious about collection for analytics and avoid unnecessary accounts.
Clear Disclosures
No legalese. Every mapping between permission and purpose is explained in plain language you can actually understand.
Product privacy entry points
Product privacy entry points
Every entry below comes from the existing product data and official privacy docs, so only real and active policy pages are listed.
Pure Lab
Apple
Windows
Industrial-grade local audio governance and asset management workstation
Effective Date: February 23, 2026
Pure Lab (hereinafter referred to as "the App") is a local-first intelligent music tag organizer. We take your privacy seriously and commit that the App does not collect, store, upload, or share any of your personal music file data.
Pure Spleeter
Apple
Windows
Professional AI Stem Separator
Effective Date: May 14, 2026
Pure Spleeter (hereinafter referred to as 'the App') is a fully offline, local AI audio source separation tool. All operations including audio loading, model inference, stem splitting, and file exporting are processed strictly on your local device. We guarantee the App never transmits or collects your media content.
Pure Refine
Apple
Windows
Professional-grade native audio tool for macOS and Windows to clean voice noise and reverb locally
Effective Date: May 28, 2026
Pure Refine is a local-first macOS and Windows professional audio processing utility. We are deeply committed to protecting your privacy. This policy explains how we handle your data.
Pure DSD Batcher
Apple
Windows
Batch SACD ISO extraction and prep
Effective Date: January 10, 2026
Pure DSD Batcher (hereinafter referred to as "the App") is developed by an independent developer. We take your privacy seriously. The App is designed to provide local SACD ISO audio extraction services. We strictly commit that the App does not collect, store, upload, or share any of your personal information or file data.
Pure Player Hi-Res
Apple
Hi-Res player with gapless playback, smart playlists, and cloud library
Effective Date: February 19, 2026 (Google Drive and Baidu Netdisk user-data disclosure update)
Pure Player Hi-Res uses the privacy-policy version maintained on this official website and updates disclosures as features evolve. The app is built on a local-first model and emphasizes user control over personal data, music files, and listening habits.
Lumi Sift
Apple
Windows
Next-Gen AI Photo Culling & Management
Effective Date: 2026-05-12
Lumi Sift maintains its privacy policy directly on the official website. We take your privacy extremely seriously. Designed as a Local-First tool, it fundamentally guarantees the safety of your photo library data.
Pure Convert Batcher
Apple
Windows
All-in-One Cross-Platform Audio Hub: Lossless Swap & DSD to PCM
Effective Date: March 25, 2026
Pure Convert Batcher (hereinafter referred to as "the App") is a fully offline, local audio transcoding and processing tool. All reading, editing, tag parsing, and conversion operations occur locally. We take your privacy seriously and guarantee the App never transmits or collects your source media files.
InGuard
Apple
Ingredient scanning and personal food safety
Effective Date: January 25, 2026
Thank you for using InGuard. We value your privacy and this policy explains how your information is handled.
Private Photo Move
Apple
Windows
Offline lightning-fast screening & privacy separation
Effective Date: January 05, 2026
“Private Photo Move” (the App) respects your privacy and is committed to protecting your personal data.
Pure Convert Pro
Apple
Windows
The Exclusive Audio Batch Processing Tool for Music Professionals
Effective Date: April 11, 2026
Pure Convert Pro (hereinafter referred to as "the App") is a fully offline, local audio transcoding and processing tool. All reading, editing, tag parsing, transcoding, and Headless CLI operations occur locally. We take your privacy seriously and guarantee the App never transmits or collects your source media files.