Your data should be yours to control. P2PDA enables peer-to-peer collaboration where you decide what to share and what to keep private—no cloud services, no central authorities, no compromises.
P2PDA works with any devices capable of direct networking, but mobile phones are the natural choice for device authority—you carry your phone everywhere, making it the ideal source of truth for your personal data.
Let's be honest—the only reason to deal with P2PDA's limitations instead of using familiar alternatives is privacy. Yes, the UX feels quirky at first (connecting devices, sharing data locally), and there are technical trade-offs, but no external services means no data sharing with third parties.
Local-First is another architecture pattern that attempts to solve privacy concerns by storing data locally on devices. However, Local-First approaches depend on eventual sync, which requires external infrastructure - introducing a potential privacy risk that P2PDA eliminates entirely. The real UX problem? You never know if your device has the latest data, and no single device has final authority over decisions.
P2PDA solves the data issues by establishing clear device sovereignty - each device maintains complete authority over its data while enabling collaboration through direct peer-to-peer exchange.
P2PDA essentially digitizes how we naturally share in person - showing photos, lending books, sharing documents. We gave up these natural interaction patterns when we moved everything to the cloud for convenience. P2PDA returns digital sharing to these familiar, privacy-preserving behaviors.
Think of P2PDA like your phone itself. P2PDA lets you share specific data directly with others, just like showing someone a photo while keeping your phone in your hands - your data stays yours. The peer-to-peer part is sharing directly with someone near you, and the device authority is how you control exactly what they see and for how long.
Family Photo Albums Each family member has their own photo album on their device. When visiting relatives, you can browse what they've shared and copy the photos you want to your album. Grandparents might take all the baby photos, while you might only want a few favorites. Everyone ends up with their own curated collection, just like how people used to share physical photo prints and everyone kept the ones they wanted.
Bookmark Manager You carry your bookmarks with you on your phone. Your iPad or Mac connects directly to your phone to access your bookmarks, even add new ones. This is temporary delegation - your phone remains the authority, but other devices can access and modify bookmarks while connected. No cloud required.
Secure Credential Sharing You carry your passwords with you on your phone, similar to a bookmark manager. When you need to log into something on a trusted device, your phone can securely share the specific credential. Once devices establish a trusted relationship, no additional authentication is needed - instant, secure access without any cloud password manager storing your credentials.
Health Data Your devices capture deeply personal health information - heart rate, blood oxygen, medications, mood, sleep patterns. This intimate data reveals patterns about your body and lifestyle that you might want to share selectively with family, doctors, or caregivers, but never with insurance companies or data brokers. P2PDA lets you share specific health insights directly with trusted people when they're present, keeping your most private information completely under your control.
Don't use P2PDA when:
Do you want apps that work instantly without accounts, function offline, and keep your data completely private? P2PDA makes this possible.