Purchases

Plumes is free to download with 3 days of full access. Starting that 3-day access window happens locally on your device and does not create a subscription or charge. After the 3 days, a single optional one-time purchase unlocks the whole app permanently — there is no subscription and nothing auto-renews or auto-charges. That purchase or restore action is handled entirely by Apple’s App Store (iOS) or Google Play (Android) through their own in-app purchase systems. Plumes never sees or receives your name, payment card, or billing details. The developer receives only anonymous, aggregate sales figures from Apple and Google — never anything tied to you. Apple’s and Google’s handling of the transaction is governed by their own privacy policies.

Store access terms in every supported language · Updated July 15, 2026

Plumes

A forensic feather atlas for your pocket — offline.

Plumes is an offline reference for identifying bird feathers, built on the U.S. Fish & Wildlife Service Feather Atlas (1,987 specimens, 436 species).

Every Feather Atlas specimen, bundled for offline use
Search and browse by species, family, and pattern
Keep a private journal of the feathers you find — with photos and notes
Per-species status & stewardship guidance

Start with a 3-day full-access free trial; after the trial, a one-time purchase unlocks Plumes permanently. No account. No subscription. No ads. Nothing is collected — your finds stay on your device. Feather data is from the USFWS Feather Atlas (public domain). Plumes is not affiliated with or endorsed by the U.S. Fish & Wildlife Service.