Snap a rock.
See what it might be.
Point your camera at a rock, mineral or fossil. WhatRock identifies it, tells you how confident it is, and shows educational field notes — with confidence you can trust, never a made-up guarantee.
Download on the App Store iPhone · iOS 17 or later · Try it free — no ads, ever
How it works
Point and snap
Field rocks, crystal-shop favorites, common minerals and a few fossils — the specimens people actually pick up on a hike or a rockhounding trip.
See the confidence and the notes
High, Medium or Low confidence, plus a class, a Mohs hardness band, luster, streak and lookalikes to check against — never a single overconfident guess.
Keep the find, or move on
Save it to your collection with a note on where you found it, or share an ID card for the specimen you want to show a friend.
Built for what you actually pick up
Common field rocks across all three classes, crystal-shop minerals, and a few fossils — identified against our own field guide, sourced from public references like the USGS and the National Park Service.
- Igneous
- Sedimentary
- Metamorphic
- Minerals
- Crystals
- Fossils
- Trail finds
- Rock-shop buys
Start with a free trial.
Identification is part of WhatRock Premium — try it with a free trial, no ads ever. 8 starter field guide entries are free for everyone, subscribed or not. Premium adds unlimited identifications, your full collection, the complete offline field guide, and collection notes.
Try it free
Premium Weekly
$6.99/week
7-day free trial for eligible new subscribers. Unlimited identifications, no ads, full collection.
Premium Monthly
$9.99/month
3-day free trial for eligible new subscribers. Unlimited identifications, no ads, full collection.
Prices in USD. The plan and trial length shown to you in the app are what actually apply — the App Store controls this at purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the period, and are managed in your Apple ID account's subscription settings. Trial length applies only to eligible new subscribers on the product it is offered on. Terms of Use · Privacy Policy.
What WhatRock will not do
- It will not call itself a lab. Every identification is educational — never a laboratory analysis, an appraisal, or a certification of any kind.
- It will not invent a confident guess. A low confidence result shows up to three candidates instead of one overconfident answer, and gem-grade material always shows Low confidence with a caution.
- It will not tell you where or whether to collect. You're responsible for local laws and land rules — collecting is prohibited in many protected areas, including US national parks.
- It will not keep your specimen photos. A photo is sent to be identified and is not retained afterward. There is no account and no login, and it does not collect your location.
Questions
Is this a lab analysis or an appraisal?
No, and the app never says it is. WhatRock is an educational field tool for curiosity and learning. For anything that matters — buying, selling, insuring or academic use — see a qualified geologist, gemologist or accredited laboratory.
What does the confidence level mean?
High means the specimen's features are clearly visible and match one entry well. Medium means the match is good but something is uncertain. Low means WhatRock isn't sure — it shows up to three possible matches instead of guessing. Gem-grade material (diamond, ruby, gold and similar) is always Low, with a note on why.
Where do the field notes come from?
Our own field guide, written from public educational sources like the USGS, the National Park Service and state geological surveys — never copied from another app or from a mineral database. Field notes are labelled "Typical for <name>," not a measurement of your specific specimen.
Does it work without a connection?
Identifying a new specimen needs a connection. Specimens you've already saved stay in your on-device collection, and Premium adds an offline copy of the full field guide for the trail.
How do I cancel a subscription?
In the iPhone Settings app: tap your name, then Subscriptions. Cancelling there stops any future charge. Refunds are handled by Apple under their policies.
Is there an Android version?
Not yet. WhatRock is iPhone-only today.
Find out what you actually picked up.
Start with a free trial. No account, no ads.