Formulary+ vs Pansophia

Formulary+ is not another formula list. It is a complete computational reference — 4,867 formulas across 16 disciplines, each with an interactive solver, evaluator, or worked example that lets you compute, verify, and learn, not just look things up. Every equation is rendered in real-time LaTeX (KaTeX), not screenshots. Every variable is defined with its SI unit. And every formula you open is one you can actually use. Built-in tools: a unit converter covering 16 quantities and about 150 units, and a table of 61 physical constants at full CODATA 2022 precision. Both are free for everyone. WHAT MAKES IT DIFFERENT Interactive Solver — Pick any variable, enter the rest, get the answer with full step-by-step solution. Covers 1,500+ formulas across all 16 disciplines. Evaluator — For identities, bounds, and series: plug in numbers and see both sides computed side by side. You see not just that a claim holds, but by how much. Worked Examples — For complex equations (tensors, PDEs, procedures): a real computation with real numbers, showing every substitution step. Personal Notes — Write directly on any formula. Export all notes as Markdown — your work is never locked in. 4,727 FORMULAS · 16 DISCIPLINES · 150 SUBCATEGORIES Mathematics — 356 formulas Algebra · Calculus · Linear Algebra · Differential Equations · Statistics & Probability · Number Theory · Discrete Math Physics — 448 formulas Classical Mechanics · Thermodynamics · Electromagnetism · Optics · Waves · Quantum Mechanics · Relativity · Fluid Mechanics Chemistry — 241 formulas Stoichiometry · Thermochemistry · Kinetics · Equilibrium · Electrochemistry · Quantum Chemistry Geometry — 229 formulas Euclidean · Analytic · Differential · Topology Mechanical Engineering — 342 formulas Computer Science — 355 formulas Electrical Engineering — 319 formulas Civil Engineering — 343 formulas Biology & Biomedical — 203 formulas Environmental Engineering — 311 formulas Geological Engineering — 271 formulas Geochemistry — 204 formulas Geophysics — 215 formulas Chemical Engineering — 325 formulas Meteorology & Atmospheric Science — 296 formulas Astronomy & Astrophysics — 269 formulas BUILT FOR REAL WORK Real LaTeX rendering — KaTeX, not static images Full variable definitions with SI units Smart search across 4,727 entries Favorites — build your personal formula collection Related formulas — discover connected equations Share as LaTeX, plain text, or rendered image Export notes as Markdown Backup & restore your favorites and notes Dark mode · All iPhone & iPad sizes FREE TO TRY, FAIR TO BUY Browse the entire catalog for free — every category, every search result, every title. Open 5 formulas per day at no cost. Formulary Pro unlocks everything: Monthly — $1.99/mo Yearly — $19.99/yr (save 17%) Lifetime — $29.99 once, forever BUILT FOR Engineering students · Science undergrads · Graduate researchers · STEM professionals · Exam prep (PE, FE, GATE, GRE) · Teachers & professors · Anyone who works with equations Formulary Pro is an auto-renewable subscription. - Formulary Pro Monthly / Formulary Pro Yearly - Payment is charged to your Apple ID account at confirmation of purchase. - Subscription automatically renews unless canceled at least 24 hours before the end of the current period. - Manage or cancel in your Apple ID Account Settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kingerders.github.io/formulary/privacy

Pansophia is an offline STEM reference for engineers, scientists, and students — 25,400+ formulas, compounds, and reference tables across 18 disciplines including physics, chemistry, biology, mathematics, and every major field of engineering. No account. No ads. No tracking. No internet required. About a third of every discipline is free. WHY PANSOPHIA Every entry is curated, cross-referenced, and verified — not generated. When you need a decay constant, a beam capacity, or a CAS number, it has to be right, and it has to work without a signal. Built for the lab bench, the job site, and the exam desk. The kind of data you used to search for daily, or flip through a mountain of handbooks to find — now in one place. WHAT'S INSIDE - 3,000+ biological species with habitat, functions, structures, timeline - 1,200+ chemical compounds with properties, synthesis, hazards & CAS numbers - 700+ mechanical components — fasteners, bearings, hinges, latches, brackets, clamps, belts/chains, flanges, gears, couplings, pumps, pneumatics + hydraulics, etc - 500+ electronic components — transistors, op-amps, microcontrollers (Arduino/STM32/ESP32/RP2040), motors, sensors, LCDs, batteries, etc - 350+ chemistry lab reference entries — solvents, buffers (Tris/PBS/HEPES), catalysts (Pd, Grubbs, MacMillan), spectroscopy (NMR/IR/MS), HPLC/GC chromatography - 254 materials — alloys, polymers, ceramics, composites, AHSS, bulk metallic glasses, high-entropy alloys, fracture toughness & creep data - 231 astronomical objects — Messier catalog, notable stars, exoplanets, black holes - 280+ structural engineering tables — AISC W/HSS shapes & beam design, RC design, NDS wood design, foundations (spread/pile/mat/retaining), seismic design, soil classification, building codes, bridges - 80+ chemical engineering reference — distillation & absorption unit ops, TEMA heat exchangers, CSTR/PFR/PBR/fluidized reactors, ASME VIII pressure vessels, API 650/620 storage tanks, relief systems, ISA-5.1 P&ID symbols, NEC/ATEX hazardous areas, HAZOP/LOPA/SIL methodology - 220+ biomedical reference entries — FDA device classes, ASTM F-series implants, ISO 10993 biocompatibility, clinical trial phases, lab values (CBC/BMP/CMP/LFTs/ABG), vital signs by age, imaging (X-ray/CT/MRI/US/PET) - 280+ pharmacology drug classes — full WHO ATC coverage with mechanism, dosing, adverse effects, interactions - 111 nuclear isotopes with cross-sections and decay data - 72 named organic reactions with reagents, conditions & mechanisms - 61 algorithms with time/space complexity analysis - 56 statistical tests with assumptions, formulas & when to use each - 48 math identities — trig, integrals, Laplace & Fourier transform pairs 18 DISCIPLINES Physics, Chemistry, Biology, Mathematics, Computer Science, Artificial Intelligence, Statistics & Data Science, Electrical Engineering, Mechanical Engineering, Civil & Structural Engineering, Chemical Engineering, Biomedical Engineering, Industrial & Systems Engineering, Nuclear Engineering, Materials Science, Astronomy & Astrophysics, Earth & Environmental BUILT-IN TOOLS - Scientific Calculator — 52 built-in constants, trig/log/factorial, history - Unit Converter — 22 unit families including electrical & magnetic - Physical Constants — 163 constants with uncertainties, searchable & copyable - Quiz & Flashcards — SM-2 spaced repetition for coursework and exam prep CROSS-DISCIPLINE CONNECTIONS 27,500+ cross-references link related concepts across fields. Tap any reference to jump between disciplines — see how thermodynamics connects to chemical engineering, or how linear algebra powers machine learning. WORKS OFFLINE — ALL DATA BUNDLED All 25,400+ entries ship inside the app. Dark theme, native LaTeX equation rendering, and interactive 3D molecular models. PRICING About a third of every discipline is free — no account, no time limit. Unlock all 18 for $9.99, or one for $0.99. One-time purchase, no subscriptions.