AI Plagiarism Check PRO

Save timestamped receipts of your drafts as you write. Then scan any text for AI signals, check citations, and trace sources. Evidence, never a verdict.

Build a private, timestamped record that shows you wrote it, over time. PROOF keeps a defensible history of your real writing process, then scans text for AI signals when you need evidence to stand behind.

WRITING RECEIPTS (free, unlimited, offline)

• Save a checkpoint of your draft any time. PROOF records the timestamp, word count, a diff against your last checkpoint, and a SHA-256 content fingerprint.
• A clear timeline of how your draft grew, kept entirely on your device.
• Protect yourself from false accusations by showing your work as it happened.

AI ANALYSIS (on demand)

• Authorship scan: per-sentence signals of AI-leaning or human-leaning writing, reported as a band with a confidence level. No fake percentage, no verdict.
• Citation check: reviews your citations against APA, MLA, Chicago, or Harvard.
• Source trace: searches the open web for close matches to your phrasing (a general web search, not an academic database).
• Full report: authorship and source trace combined.

VOICE PROFILE

• Calibrate a baseline from your own past writing. Later scans flag voice drift, a passage that reads unlike your usual style. Drift is a prompt to look closer, not proof of anything.

PROJECTS AND INSIGHTS (free, on device)

• Organize work into projects with deadlines and local reminders, plus a Quick Scans bucket.
• See words written this week, rolling 30 and 90 day windows, an activity heatmap with your streak and busiest day, and readability metrics.

SHARE FROM ANY APP

• Send text from another app into PROOF to checkpoint or scan it.

PRIVACY BY DESIGN

• No account, no sign in, no ads, no tracking, no analytics.
• Everything stays on your device. The only data that ever leaves is the specific text you choose to submit for a scan, sent over an encrypted HTTPS connection to a third-party AI provider for analysis.
• Erase everything at any time.

AN HONEST TOOL No tool can prove how a text was written. PROOF reports evidence and its strength, so treat it as one signal, never a verdict. Detection is weaker on short, heavily edited, translated, or non-native English text.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/