ProvoLog: Private Field Notes

ProvoLog is a private notebook for work in the field. Record text, photos, voice memos and video, each stamped with the time and your location, and keep everything encrypted on your own phone. No account. No cloud. No server. Your notes never leave your phone unless you export them. CAPTURE EVERYTHING IN ONE TIMELINE • Organise work into projects, such as "Site inspection" or "Water survey" • Add text, photos, audio and video to a timeline of dated entries • Every entry carries the time, GPS position and street address • Voice notes are turned into text on your phone after you record (one-time 42 MB model download, then on-device) • Search across every note, including voice transcripts and text found in photos • Tags, stars, filters and saved filters keep large projects tidy • Export a clean PDF report of any note PRO: PHOTOS YOU CAN STAND BEHIND • Content Credentials (C2PA): each photo is signed on your phone with a key held in the Android Keystore, so any later edit is detectable. Check a photo inside the app, on contentcredentials.org/verify, or with c2patool. Signed with a device-generated certificate, not a public authority. This is an integrity aid, not legal certification. • Photo analysis on the device: scene labels and text recognition read signs, gauges and equipment tags, and make them searchable • Map view of every located note • AI summarise and rewrite for voice-dictated notes, done on the device • ZIP export with the signed original photos, audio and video PRIVATE BY DESIGN • Database encrypted with SQLCipher (AES-256); photos, audio and video encrypted on save • Unlock with fingerprint, face, device lock or an app PIN • Lock single projects with their own passcode (Pro) • Optional duress PIN that erases all data instantly • Screenshots and the recent-apps preview are blocked • App backups are off, so nothing is copied to the cloud • No accounts, no analytics, nothing sold BUILT FOR REAL WORK Inspectors, surveyors, researchers, journalists, NGO staff and legal observers use ProvoLog to record what they saw, where, and when. FREE • Up to 3 projects • Text, photo, audio and video capture with GPS • On-device voice transcription and search • PDF export • Supported by ads PRO: ONE-TIME PURCHASE, NO SUBSCRIPTION • Unlimited projects • Content Credentials on photos • Photo analysis (labels and text) • Map view • AI summarise and rewrite • ZIP export with signed originals • Password-locked projects • No ads PERMISSIONS Camera and microphone for capture. Location to stamp entries (optional, only while the app is open). Biometrics for unlock. Each is requested only when needed. NETWORK Notes, photos, audio, search, signing and export work without a signal. The network is used only for ads on the free tier, the one-time voice-model download, Pro map tiles, street-address lookup and Google Play purchases.