Catalog every specimen.
Never lose the story behind it.
Rockkeep is an on-device catalog for a rock, mineral, fossil, and gem collection — a serious alternative to a spreadsheet or a shoebox of handwritten tags. Every specimen gets a permanent, museum-style catalog number the moment you add it.
Built for a real collection
Specimen Catalog
Record color, streak, luster, Mohs hardness, and crystal system alongside a permanent catalog number that's never reused, even if the specimen is later deleted.
Find Sites & Trips
Log reusable find-site records with copyable coordinates and access notes, then a dated trip to a site — Rockkeep automatically counts the haul, with nothing to tag by hand.
Display Cases & Rotation
Track what's in each case with a live fill meter, and get rotation suggestions that surface an off-display specimen whose type is underrepresented — a nudge, never an automatic move.
Want List
Keep a list of what you're still hunting for with a classic locality, budget, and priority. Mark one found and it walks straight into a new specimen record.
Ledger, Stats & Labels
Track acquisition costs for insurance purposes, see your collection's shape at a glance, print cut-and-fold specimen labels, and export a full CSV of every specimen.
Private by Design
Rockkeep makes no network call of any kind — no analytics, no crash reporting, no ads, no trackers, no account or login. Every record and photo stays on your device.
Completely free
Every feature, unlocked
- Unlimited specimens, find sites, and trips
- Display cases with rotation suggestions
- Want list, acquisition ledger, and live statistics
- Label printing, full CSV export, and backup/restore
- No ads, no account, no in-app purchases
Rockkeep is a personal cataloging tool. Identification details, hardness values, and acquisition costs are only as accurate as what you enter — it isn't a substitute for professional appraisal, geological identification, or insurance underwriting.