ProofPI: Private Investigator
ClearStack Apps Business iPhoneiPadiPod touch
ProofPI: Private Investigator is a free Business app for iPhone and iPad by ClearStack Apps. Requires iOS 17.0. Updated October 27, 2026.
- Price
- Free
- on the App Store
- Size
- 10 MB
- Age 4+
- Updated
- Oct 27
- 2026 · v2.0.2
Screenshots
About ProofPI: Private Investigator
WHAT IT DOES ProofPI is the field log and case file for private investigators who keep their own records. It works offline and keeps your records on your phone. • A case file for each client, with subjects, vehicles, reference photos and the scope of work • Surveillance sessions with a live on-station timer, start and stop times, and an optional GPS stamp of your own position • One-tap observations recorded to the minute, plus typed entries. Each entry keeps the time you observed it and the time you recorded it • Photos from the camera or your photo library, numbered in order and saved at full size, with a SHA-256 fingerprint taken when each photo is saved and a check that the file has not changed since • Videos fingerprinted where they are: choose a clip and ProofPI records its name, size and SHA-256 fingerprint, then checks any copy against it later • Case notes for interviews, records searches, database searches and phone calls • Mileage at your own per-mile rate, and expenses with receipt photos • Invoices built from your own records: finished time on station at your hourly rate, mileage and expenses, with an invoice number, due date, your payment details and a paid or unpaid status. A one-page billing summary too • A case-file PDF with a cover page, your signature, each session with its photos and timeline, and an index of every photo with its fingerprint • An evidence package: one zip with the PDF, the photo files, receipts, spreadsheets and a SHA-256 manifest to share with a client or attorney • Spreadsheet (CSV) exports of cases, hours, observations, notes, mileage, expenses and invoices • A full backup in one file that restores on a new phone and only adds what is missing, so nothing already there is overwritten • A dark theme for night work, a privacy screen that hides the app in the app switcher, and an iPad layout with the case list and the case file side by side WHO IT'S FOR • Licensed solo private investigators and small agencies • Surveillance, insurance and workers' comp investigators • Anyone who keeps a separate case file per client and may have to produce it later YOUR RECORDS STAY YOURS Cases, sessions and photos are stored on your device. There is no account, and nothing is copied to a cloud unless you save a backup there yourself. GPS is used only when you tap to stamp a session, never in the background, and never to locate anyone but you. ProofPI is a record-keeping and document tool. It is not legal or investigative advice and does not guarantee that any record meets your licensing board's or a court's requirements. A photo fingerprint shows that a file has not changed since it was added; it does not prove who took it or make it admissible. Recordkeeping and retention rules are set by your state and board, so review and adapt your records to your jurisdiction. Contact: [email protected] SUBSCRIPTIONS ProofPI Pro is available as a monthly or yearly auto-renewing subscription, or as a one-time lifetime purchase. Payment is charged to your Apple Account when you confirm the purchase. A subscription renews automatically unless you cancel it at least 24 hours before the end of the current period. Manage or cancel it in your Apple Account settings. Terms of Use (EULA): https://clearstackapps.com/terms Privacy Policy: https://clearstackapps.com/privacy
What’s new
Version 2.0.2 · Updated October 27, 2026
The website service strip now shows a few different messages and designs. Fixes and small improvements.
App privacy
The developer, ClearStack Apps, reported these privacy practices to Apple.
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Usage Data: Product Interaction
- Diagnostics: Crash Data, Performance Data
Used for: Analytics, App Functionality
Alternatives to ProofPI: Private Investigator
Looking for apps like ProofPI: Private Investigator? Here are 6 similar apps on the App Store. The highest rated is MinTask GTD – Task Manager (5.0/5), and all 6 are free to download.
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Investment Suite
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| ProofPI: Private Investigator | – | Free | October 27, 2026 | |
| ZCarFleet Enterprise Edition | – | Free | Sep 21, 2026 | Compare |
| MinTask GTD – Task Manager | 5.0 / 5 (1) | Free | Oct 9, 2026 | Compare |
| Time Entry for Business | 5.0 / 5 (2) | Free | Nov 6, 2026 | Compare |
| papry – Document Organizer | 5.0 / 5 (4) | Free | Oct 26, 2026 | Compare |
| Leads Engagement Suite | 5.0 / 5 (2) | Free | Nov 6, 2026 | Compare |
| Investment Suite | – | Free | Nov 3, 2026 | Compare |