RockSpin
Rock Thin Section Viewer
0 ratings
Free
In-App Purchases
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About
RockSpin brings the polarizing microscope to your fingertips. Designed for geology students, researchers, and educators, this app lets you explore petrographic thin sections with full 360-degree rotation. Compare PPL and XPL views, inspect mineral markers, explore 3D crystal structures, browse a curated rock image catalog, and save favorites across your account.
Every thin section is available at 300px at no charge. Pro ($4.99/month or $49.99/year) unlocks 500px and 700px viewing. Subscriptions auto-renew and can be cancelled in Apple ID settings.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://rockspin.app/privacy
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What's New in RockSpin
1.0.8
September 15, 2026
Added Korean language support. Browse 97 rock types with matching thin sections, and read mineral stories in English and Korean. Every thin section is now available at 300px for free; Pro unlocks 500px and 700px. Added a mineral dictionary and alphabet jump list.
MoreSubscription plans
Pro Monthly
Full sample access + 300 AI credits each month.
$9.991 Month
1
In-App Purchases
$14.99
1,000 Credits
1,000 credits for AI Rock Image generation
