Questions and honest answers.

Nomen covers 150,000+ species across 29 species packs: 14 terrestrial packs and 15 aquatic packs. Terrestrial packs include birds, mammals, reptiles, amphibians, insects, arachnids, plants, and fungi. Aquatic packs cover fish, sharks, rays, nudibranchs, corals, and more. Only download what you shoot.

When the top two suggestions are very close in confidence, Nomen opens a review dialog where you can keep the top match, choose another suggestion, or mark the photo as unmatched. The gap threshold is configurable in settings. Photos that fall below the overall confidence threshold are silently marked as unmatched, and no keywords are written.

When your photos contain GPS coordinates, Nomen detects the geographic region and cross-references range data across 29 species packs. This reduces implausible suggestions. Species that do not occur in that region are filtered out.

Yes. Every subject mode detects and matches all species in the frame. You review each detection in a grid before anything is written. For flocks, reef surveys, and dense groups, Fast survey and Deep survey go further. They detect every individual, count them per species, and present the results as a population tally.

Fast survey and Deep survey both count and classify every individual in a scene. Nomen tiles the image into overlapping sections and runs detection on each tile, catching subjects that would be too small in a single full-frame pass. Fast survey runs at standard resolution (10 to 30 seconds per photo). Deep survey runs at full sensor resolution (1 to 3 minutes per photo) when subjects are small or distant. You get per-species counts, rarity labels, detection overlays, and full metadata written to Lightroom. Designed for bird flocks, reef surveys, wildlife census work, and any crowded scene. Counts on distant or small subjects are approximate.

Yes. 15 aquatic species packs cover fish, sharks, rays, nudibranchs, corals, and more. Quick-select dive regions (Coral Triangle, Red Sea, Caribbean, and others) for fast setup.

No. Nomen runs 100% locally on your machine. Your photos never leave your computer. There are no cloud servers, no uploads, and no external API calls during matching.

Yes, fully offline once species packages are downloaded. All matching runs entirely on your machine with no internet connection required. The only online requirement is license validation, which occurs every 30 days with a 30-day grace period. This means you can work offline for up to 60 days before needing to reconnect.

Nomen requires Adobe Lightroom Classic (version 12.0 or later) on macOS (Apple Silicon recommended) or Windows. The core engine requires approximately 1.5 GB. Species packs vary by selection. A typical install is 1.5 to 2 GB, or about 5 GB with every pack installed. Lightroom CC (cloud) is not supported at this time.

Ensure the plug-in is installed and enabled via File > Plug-in Manager > Add. If the plug-in shows a non-running status, try removing and re-adding it. Restart Lightroom after making changes.

Nomen writes IPTC captions (formatted as Common Name (Scientific Name) with a confidence label), social-ready captions with camera settings and hashtags, keyword hierarchies (Nomen > Class > Family > Genus > Scientific Name), common name keywords, and 15 custom metadata fields (searchable: status, scientific name, common name, confidence, family group, region, method, quality, source). Star ratings and color labels can optionally be enabled in settings.

Already-matched photos are automatically skipped during batch processing. Manual IDs you have made are preserved.

Yes. “Undo Last Nomen Match” reverts all metadata, keywords, captions, ratings, and labels. Nomen keeps 10 rollback snapshots.

Each license is a one-time purchase tied to your nomenapp.com account. You can activate the plugin on the number of machines specified by your tier (Personal: 2, Professional: 5, Organization: 25). All tiers include identical features with no usage limits. Upgrades are available at any time for the price difference.

We offer a 14-day money-back guarantee. If Nomen does not meet your needs, contact support for a full refund, no questions asked.

Photos that fall below your configurable confidence threshold (default 0.5) are marked as unmatched, and no species keywords are written for these photos. Try a photo with a clearer view of the subject, ensure the subject occupies a significant portion of the frame, or lower the confidence threshold in settings.