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Seeded sieve-stack composer
Pick phi and mm apertures from a mesh library or apply ready lab-kit templates, then key retained masses with live mass-balance and percent checks before anything is plotted.
Sieve stack · Folk & Ward · Teachable texture
Build a real sieve stack, weigh in the fractions, and walk out of lab with Folk & Ward stats, cumulative curves, and teachable deposit texture—fully offline, no spreadsheets required.
Illustrative marketing figures; not App Store metrics.
Field notes
PhiScale Tephra Bench is the offline lab workbench undergrad volcanology and sedimentology courses actually finish on time. Compose ASTM-style meshes from a seeded phi/mm library or drop in a lab-kit template, enter retained mass per sieve plus pan, and watch mass-balance checks, Folk & Ward mean–sorting–skewness–kurtosis, and interactive frequency/cumulative charts update the instant the balance changes.
Named samples stay on-device with stack snapshots and notes; overlay up to three curves for viva prep; clone classic tephra reference suites for demos; drill sorting class, transport interpretation, and phi↔mm conversion; then export a multi-page PDF worksheet and CSV—zero network, zero accounts, zero location services.
Stack composer · live stats · curve canvas · exports
Pick phi and mm apertures from a mesh library or apply ready lab-kit templates, then key retained masses with live mass-balance and percent checks before anything is plotted.
Graphic mean, sorting, skewness, and kurtosis recompute on-device as masses change, with plain-language sorting bands written for teaching—not operational hazard models.
Swift Charts frequency and probability curves with phi markers, D16/D50/D84 callouts, and toggles between weight-percent and cumulative views for lab-report figures.
Overlay dual curves on synchronized axes with delta-sorting callouts and a side stats strip built for TA walkthroughs and student discussion.
Clone classic fallout, scoria lapilli, and reworked-ash profiles into your bench, then train sorting class, transport reads, and phi↔mm conversion with explanations after each item.
Generate a multi-page lab handout—stack table, chart, statistics block, classroom texture guidance, signature line—plus optional fraction CSV, entirely on-device.
Compose meshes, weigh fractions, read Folk & Ward, and export the worksheet—all on device, scoria-amber calm on basalt teal.