# Perf: Stamp Identifier & Value — Scan, Identify & Collect > Stamp identification, collection management, and philatelic tools for collectors. (iPhone/iPad app by SCALINGWEB TECHNOLOGIES.) - Source: https://appshunter.io/ios/app/perf-stamp-identifier-and-value/id6794675329 (this page in markdown: same URL + `.md`) - Developer: [SCALINGWEB TECHNOLOGIES](https://appshunter.io/developer/1712899707) - Category: Reference, Lifestyle - Price: Free with in-app purchases - Rating: 5.00/5 from 5 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 8 MB - Languages: British English, Dutch, French (France), German (Germany), Italian, Japanese, Brazilian Portuguese, Chinese (Simplified, China), European Spanish - Released: 2026-08-18 - Data updated: 2026-09-28 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/perf-stamp-identifier-and-value/id6794675329/reviews.md ## What is Perf? Perf identifies stamps, tells you how sure it is, and keeps your collection. No account. No ads. Nothing leaves your phone but the photo you choose to scan. TRY IT BEFORE YOU PAY Five identifications a day, every day, on the standard plan — plus a full album page scan every month. You will know whether Perf works on your stamps before it ever asks you for money. Most scanner apps give you two scans and then a price. That is not how you buy a tool. IT TELLS YOU WHEN IT ISN'T SURE Every identification comes with an honest attribution: confident, or likely-and-worth-verifying, with the reason stated plainly — perforation, centering, a variety that needs a second look. When Perf is unsure it shows you the alternatives instead of one confident guess. An identifier that is quietly wrong is worse than one that admits it. SORT A WHOLE PAGE AT ONCE Photograph an album page or a stockbook sheet and Perf finds every stamp on it, identifies each one, and lays them out for you to confirm or correct together. Inherited a collection? This is the difference between an afternoon and a winter. IT WILL NOT INVENT WHAT YOUR STAMP IS WORTH Perf does not price stamps. No catalog publisher is licensed to it, so rather than guess at a figure it says so plainly and leaves the appraising to appraisers. Identifying a stamp, measuring its perforations and keeping your album do not depend on a price. Nobody's stamp is worth more because an app said so. A REAL ALBUM, NOT A SCAN HISTORY Stamps mount in pages by country. Record condition, quantity, notes and how you came by each one. Sort, search your own collection in plain words, mark duplicates for trade, keep a want list and get told on the review screen when a new scan fills a gap. Everything syncs privately across your own devices through iCloud, with no login, ever. THE COLLECTOR'S TOOLS, ON SCREEN A perforation gauge you lay your own stamp against, calibrated to your screen so the teeth measure true. Your measurement, not Perf's guess, and often the thing that settles an attribution. Condition grading suggested from your photo with the cues it used. Variety, overprint and postmark reading. Plain-language explanations of the philatelic terms Perf uses, for anyone who has just inherited an album and does not yet speak the language. PERF PRO The standard plan keeps working forever, and anything you have mounted stays yours. Pro adds unlimited identifications, unlimited page scans, a collection-wide insight report and CSV export. One year, or one payment for good. Questions or requests: https://scalingwebapps.com/contact.php --- ——— This app offers an auto-renewable subscription. Payment is charged to your Apple Account at purchase confirmation. It renews automatically unless turned off at least 24 hours before the current period ends; your account is charged for renewal within 24 hours before the period ends. Manage or cancel anytime in your Apple Account settings. Prices may vary by region. A one-time lifetime purchase is also available. Privacy Policy: https://scalingwebapps.com/policies/perf-privacy-policy.php Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Stamp identification from photos - Confidence levels and reasons for identification - Full page album scanning - Collection management with notes and condition - Perforation gauge and condition grading tools - Private iCloud syncing across devices ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Pro Yearly | $19.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Pro Lifetime | $49.99 | one-time | ## Frequently asked questions about Perf ### Does Perf have ads? No, Perf is ad-free. The app explicitly states 'No ads' in its description, ensuring an uninterrupted user experience for stamp identification and collection management. ### How much does Perf cost? Perf is free to download and offers a standard plan with five daily identifications and one monthly album page scan. A Pro subscription is available for unlimited scans and advanced features, with pricing varying by region. A 7-day free trial is offered for the Pro Yearly plan. ### What devices does Perf support? Perf is available on iPhone and iPad, supporting iOS devices. The app utilizes iCloud for private syncing across your own devices. ### How often is Perf updated? The latest version of Perf is 1.0, and it was last updated on August 18, 2026. Specific update frequency beyond this is not detailed, but the release date indicates recent development. ### Can Perf identify the value of my stamps? No, Perf does not invent or provide stamp valuations. It focuses on identification, perforation measurement, and condition grading, leaving the appraisal of worth to professional appraisers. ### Is my stamp collection data safe with Perf? Yes, your collection data is kept private and secure. The app emphasizes that 'Nothing leaves your phone but the photo you choose to scan' and syncs privately via iCloud without requiring an account or login. ### What are the benefits of Perf Pro? Perf Pro offers unlimited stamp identifications and unlimited page scans, providing a significant advantage for users with large collections. It also includes a collection-wide insight report and CSV export functionality. ### What is the age rating for Perf? Perf has an age rating of 4+, making it suitable for a wide range of users, including younger collectors or those new to the hobby. ## Version history (last 1 release) ### 1.0 — 2026-08-18 No release notes. ## Apps similar to Perf | App | Rating | Price | Category | | --- | --- | --- | --- | | [BugLens - Bug Identifier](https://appshunter.io/ios/app/buglens-bug-identifier/id6754509659) | 5.0 (55) | Free | Reference | | [Coin Identifier\| Value Scanner](https://appshunter.io/ios/app/coin-identifier-value-scanner/id6798334778) | — | Free | Reference | | [TCG Card Scanner \| Identifier](https://appshunter.io/ios/app/tcg-card-scanner-identifier/id6761188925) | 5.0 (3) | Free | Reference | ## More apps by SCALINGWEB TECHNOLOGIES - [PDF Converter, Scanner & Word](https://appshunter.io/ios/app/pdf-converter-scanner-and-word/id6748041505) - [Tip Calculator: Split Bills](https://appshunter.io/ios/app/tip-calculator-split-bills/id6772818872) - [Email Draft: AI Writer](https://appshunter.io/ios/app/email-draft-ai-writer/id6773403527) - [Cedar: Cigar Scanner & Tracker](https://appshunter.io/ios/app/cedar-cigar-scanner-and-tracker/id6775632277) - [Soundtapes: Family Memories](https://appshunter.io/ios/app/soundtapes-family-memories/id6778595384) - [Quiver: Arrow Puzzle Escape](https://appshunter.io/ios/app/quiver-arrow-puzzle-escape/id6780092146) All apps by SCALINGWEB TECHNOLOGIES: https://appshunter.io/developer/1712899707 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-28.*