Perf: Stamp Identifier & Value
Scan, Identify & Collect
About
This app helps identify stamps from photos, providing confidence levels and reasons for its assessments. It also offers tools to manage your stamp collection, including page scanning and condition grading, all while keeping your data private on your devices.
What's New in Perf
1.0
August 18, 2026
Subscription plans
Pro Yearly
Unlimited identifications and page scans.
In-App Purchases
$49.99
Pro Lifetime
Pay once, Perf is yours.
Developer apps
FAQ
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.
