Winnow finds your duplicates, scores your bursts, and surfaces your best shots, all on your Mac and iPhone, with no server, no subscription, and no waiting.
Winnow your library: separate the keepers from the rest, entirely on your own device.
The real prototype, running above. Press K to keep, X to reject, ↵ for the next cluster.
Why Winnow
Winnow uses on-device AI: no uploads, no cloud processing, no third-party servers. Your library never leaves your hands.
Pay once and own it. No monthly fee, no renewal, no account required. In a category full of subscriptions, Winnow charges you once and gets out of the way.
Perceptual matching catches duplicates even when filenames differ or slight edits were made. Blur detection and best-of-burst scoring surface the sharpest frame in every sequence.
Start a cull on your Mac, continue reviewing on your iPhone or iPad. Your session and your decisions stay in sync, on your devices, not in a cloud account.
How it works
Open Winnow and select a folder, an album, or your entire Photos library on Mac or iPhone. No import, no conversion.
On-device AI groups near-duplicate images, scores each frame for sharpness and exposure, and flags the best shot in every burst.
Review grouped clusters side by side, confirm Winnow's picks or swap them, then delete or export in one pass.
Pricing
Scan your library, see every duplicate cluster, and preview Winnow's picks. On-device, no account, no time limit. Keep what you find.
Try itEverything in Free, plus blur detection, best-of-burst scoring, and cross-device continuity between your Mac and iPhone or iPad. Pay once; use it as long as you own your device.
Get ProEverything in Pro, plus RAW file support, batch export with folder structure, and culling presets you can save and reuse across shoots. No subscription, no per-seat fee.
Get Pro MaxQuestions
No. All processing runs on your Mac, iPhone, or iPad using on-device machine learning. Your photos never leave your device, and Winnow does not require an internet connection to function.
No. Winnow is a one-time purchase. Free users keep the duplicate-finding tools at no cost, forever. Pro and Pro Max are single payments with no renewal, no annual fee, and no expiration.
Yes. Winnow runs natively on iPhone and iPad and can scan your on-device Photos library directly. With Pro or Pro Max, your cull sessions sync between your Mac and your iPhone over your local network, so you can start on one device and finish on the other.
Epiphani Studios builds tools that run on your hardware, respect your files, and charge you a fair price once, because the software you rely on every day should be something you own.