Do my photos ever upload anywhere?
Never. Keepers runs entirely on the iPhone using Apple's Vision framework on the Neural Engine. Your photo bytes stay on your card and your device — 0 bytes are uploaded. There is no Keepers server holding your images, which is exactly why it works within client contracts that forbid uploading wedding or portrait files.
Which formats and cameras are supported?
RAW from the major camera makers (Canon, Sony, Nikon, Fujifilm and more) plus JPEG. Keepers reads the full-res JPEG preview embedded in each RAW for fast scoring, so it scans thousands of frames without decoding every file.
How does it cull a 60–150 GB session on a phone?
It doesn't move the session — it reads it in place off your USB-C card or SSD. Scoring runs on the embedded previews via the Neural Engine, with thermal-aware batching so a 3,000-frame session finishes in minutes without overheating the phone.
Will my edits transfer to Lightroom?
Yes. Stars, picks and color labels export as standard sidecar XMP, lossless and non-destructive. Import the folder into Lightroom Classic or Capture One and your selects and ratings are already applied.
How is this different from Aftershoot and other AI cullers?
Those tools proved photographers will pay for AI culling — but they're desktop-only and lean on the cloud. Keepers is mobile-native and fully on-device: cull straight from the card on your phone, between the ceremony and the reception, with nothing uploaded and no server subscription.