Rock ID - Stone Identifier

What it does

Rock ID is a mobile utility for identifying various rocks, gems, and minerals. Users can either take a new photo or upload an existing one from their library, and the app's recognition technology provides a detailed identification. Beyond identification, the app serves as a digital encyclopedia, offering information on a rock's properties, history, and occurrence. It also allows users to save their findings into personalized digital collections.

Where it shines

Rock ID makes a strong first impression with its polished onboarding. The animated feature carousel at 00:22 is a highlight, using an in-situ phone mockup to clearly demonstrate the app's core 'snap-to-identify' loop. This method is far more compelling than static slides. The app also excels in its presentation of information. The rock detail screen, seen at 01:31, is clean and well-organized, breaking down complex geological data into digestible sections like synonyms, crystal system, and Mohs hardness. This makes specialized knowledge accessible to a general audience.

UX highlights

Thoughtful Error Recovery: The app anticipates AI failures with a 'Not Your Rock?' section at the bottom of results (02:31), offering to retake the photo or search manually. This prevents user frustration.
Contextual Permissions: Before requesting camera access, the app displays a helpful 'Snap Tips' screen (01:03), explaining how to get the best results. This primes the user and provides value before asking for a permission.
Clean Information Architecture: Detailed rock pages are structured with clear headings and visual cues, making it easy to scan for specific properties.
Simple Collection Management: Creating a new collection is a straightforward process (02:14), and the visual layout of 'My Rocks' makes it easy to organize findings.
Guided Discovery: For users who don't have a rock to identify, the app offers curated sets like 'Zodiac Rocks' and 'Gems' (02:34) to encourage exploration.
In-App Rating Prompt: At 02:23, after the user successfully adds a rock to a collection, a native rating prompt appears, capitalizing on a moment of positive accomplishment.

Monetization & growth

The app employs a hard paywall during onboarding. After a mandatory sign-up, the user is immediately presented with a subscription screen at 00:36. The paywall clearly lists the benefits of the PRO version and presents yearly and weekly options, with the yearly plan highlighted as the 'BEST OFFER.' A key feature is the opt-in 'Enable free trial' toggle (00:38), which dynamically changes the weekly plan to a 3-day free trial, giving users a clear choice. Growth is encouraged through a 'Share App' button on the home screen (04:18) and the contextual rating prompt.

Who it’s for

This app is well-suited for geology students, amateur rock collectors, hikers, and anyone with a casual curiosity about the natural world. Its simplicity makes it accessible for beginners, while the detailed information provides value for more knowledgeable hobbyists. The collection feature is tailored for users who want to create a digital catalog of their finds over time.

Notes & opportunities

The mandatory sign-up and immediate paywall create significant friction for new users. While this likely filters for high-intent users, it may deter many who simply want to try the app's core feature once. Offering a limited number of free identifications could be a powerful way to demonstrate value and increase the conversion rate. Additionally, the camera interface is very basic; adding features like on-screen guides or level indicators could improve the quality of user-submitted photos and the accuracy of identifications.