Chemical Engineering Formulate vs Stuff | ToDos and Lists

CHEMICAL ENGINEER is the essential tool for Chemical Engineers, Process Engineers, and engineering students. With over 1,500 formulas and calculators, this is the most comprehensive chemical engineering reference app available. The app features 700+ engineering calculators across 50 categories, 750 conversion formulas, 8 temperature scales, and 14 reference tables. All formulas support US and Metric (SI) units with one-tap toggle and dual-unit display. CORE CHEMICAL ENGINEERING - Heat Transfer -- LMTD, overall heat transfer, fin efficiency, radiation, Fourier's law - Fluid Mechanics -- Reynolds number, Bernoulli, Darcy-Weisbach, Hagen-Poiseuille - Thermodynamics -- Ideal gas, Clausius-Clapeyron, Antoine equation, compressibility - Reaction Kinetics -- Arrhenius equation, rate laws, CSTR/PFR design, Levenspiel - Mass Transfer -- Fick's law, mass transfer coefficients, wetted wall columns - Distillation -- McCabe-Thiele, Fenske, Underwood, relative volatility - Dimensionless Numbers -- Reynolds, Nusselt, Prandtl, Schmidt, Sherwood, Grashof UNIT OPERATIONS Filtration, Packed/Fluidized Beds, Compressor Sizing, Mixing, Cooling Towers, Membrane Separation, Crystallization, Liquid-Liquid Extraction, Adsorption PROCESS & SAFETY Process Economics, Process Control, Safety Engineering, Corrosion and Electrochemistry ENVIRONMENTAL Air Quality, River/Lake/Soil Pollution, Infiltration and Recharge, Evaporation, Waste ADDITIONAL CATEGORIES Piping (70), Pressure Stress (109), Material Weight (101), Area Formulas (60), Flat Plates, Pumps, Pump Laws, Steam, Crusher, Vapor Separators, Equilibrium, Cogeneration, and more CONVERSIONS BTU, Cubic, Flows, Ft-Lbs, Horsepower, HVAC, Hydraulic, Linear, Liquid, Metric (460), Power, Pressures, Square Measures, Watts, Weights TEMPERATURE SCALES Celsius, Fahrenheit, Kelvin, Rankine, Reaumur, Newton, Delisle, Romer 14 REFERENCE TABLES Chemical Properties, Steam Tables, Pipe Schedules, Material Densities, pH Scale, Engineering Constants, Chemical Resistance, Water Quality, Critical Properties, Antoine Constants, Heat Transfer Coefficients, Dimensionless Numbers, Gas Properties, Flammability Limits FEATURES - US/Metric toggle with dual-unit display - Save calculations and favorites - Share and export results - Searchable reference tables - Dark mode interface - Works offline Don't see a formula you need? Email us and we'll include it in the next update.

Stuff is built to help you organize your life and achieve your goals. Your Stuff can be as simple as a list of to-dos, or as complex as a system of interconnected lists, organized into spaces full of dependencies, deadlines, and carefully planned tasks. Stuff is designed to keep track of the dozens of to-dos that come to mind throughout the day, helping to clear your mind and turn thoughts into action. Dependencies: A Simple Yet Powerful System One of Stuff’s most unique and powerful features is Dependencies. Unlike other to-do apps, where tasks pile up into overwhelming lists, Stuff lets you link tasks together so that future steps stay out of sight until they’re relevant. This means that doers can brain-dump everything into Stuff without worrying about clutter, only the next actionable steps will be visible. Whether you’re planning a project, setting up routines, or just organizing weekend errands, Dependencies help keep Stuff clean, focused, and effortlessly powerful. Shared Lists: Collaborate Seamlessly Some tasks aren’t meant to be tackled alone. With Shared Lists, you can collaborate with teammates, classmates, family members, or anyone who needs to be in the loop. Assign tasks, track progress, and keep everyone on the same page, all within Stuff’s clean and intuitive interface. The Adventure Log: See Your Progress Over Time Every completed task tells a story, and with the Adventure Log, you can look back at everything you’ve accomplished. Filter by tag, space, or item type to see exactly what was done and when. Whether tracking work projects, study sessions, or personal growth, the Adventure Log helps you reflect on progress and stay motivated. The Today Card: Stay Focused, No Matter Where You Are Your most important tasks should always be front and center. The Today Card gives doers a snapshot of the day’s top priorities, no matter where they are in the app. With a quick tap, you can check your highest-priority tasks, see how much is left to do, and even glance at your Daily Note. Even if you’re bouncing between lists and organizing your week, the Today Card ensures that what matters most stays in view. Plan Ahead or Save for Later Sometimes, tasks don’t need to be done today, but they still matter. Stuff makes planning easy with Someday Tasks, allowing doers to set things aside without forgetting them. Assign a Deadline to separate when you plan to do something from when it has to be done. And for routine actions, repeating tasks keep everything on track automatically. Widgets: To-Dos at a Glance Stay on top of your tasks without even opening the app. Home screen widgets let doers see their lists instantly, making it easy to check off tasks, review deadlines, and stay on track throughout the day. Designed to Stay Open All Day Stuff is built to fit into your life, not disrupt it. Whether open on your desk while working or quickly pulled from your pocket while on the go, Stuff adapts to the way you work. The interface is designed to be both visually appealing and highly functional, keeping to-dos top of mind without being distracting. Built for Doers, Growing for the Future This is just the beginning! Stuff will continue to grow, with exciting new features on the roadmap designed to make productivity even more intuitive, effective, and enjoyable. Meet the Developer Stuff was built by me, Austin, an indie developer and a one-person team. I’ve always been passionate about productivity, but after trying countless apps, I couldn’t find one that truly fit my needs. I wanted something that combined a simple, beautiful interface with powerful features like Dependencies and repeating lists. So, I taught myself to code and started building Stuff, the to-do list of my dreams. Stuff uses Apple's Standard Licensing Agreement found here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/