Plutocalc+ Water vs vPass VMS

Plutocalc is the most complete and popular problem solver suite for water treatment, wastewater, hydraulics, environmental chemistry and unit conversions. Plutocalc+ is a premium version of the free Plutocalc packed some extras. For iOS, only the premium version is available. Features: - 103 solvers - 2670+ different calculations - Self explanatory diagrams - Internal databases for chemicals and standards - Results as you type, nothing is faster than that! - Multiple languages: English, Portuguese and Spanish - Available for multiple platforms - 100% offline, no data connection required - Advertisement free NOTE: If after the update the program loads to a blank screen, just reinstall to fix. Solver list: Conversions - Angle - Area - Conductivity and resistivity - Density and concentration - Energy - Flow - mass - Flow - volumetric - Flux and rates - Forces - Hardness in water - Length - Mass - Power - Pressure - Speed - Temperature - Time - Volume Geometry - Buffer tank capacity - Cylinder volume - Cone volume - Cube volume - Circle properties (radius, diameter, perimeter and area) - Horizontal cylindrical tank volume - Triangle properties with sides/angles determination - Municipal plants flow estimation - Nominal pipe sizes and wall thickness - Sieve sizes according - Rainfall volume Energy and power - Head loss in pipes - Open channels or partially filled pipes - Orifice plates with incompressible fluids - Parshall flumes flow measurement - Rectangular flumes flow measurement - Flow adjustment for dosing/metering pumps - Pump power and energy consumption - Blowers and compressors power and energy consumption - Mixing velocity gradient - Reynolds number and speed Contaminants - Boiler water quality and blowdown - Periodic table of elements with oxidation states - Ionic Balance and Conductivity - CO2 conductivity in pure water - TOC, COD and KMnO4 relations - Langlier Saturation Index - LSI - Ryznar Stability Index - RSI - Silt Density Index - SDI - Modified Fouling Index - MFI - Sludge Volume Index - SVI Solutions - Chemical dosing flow, mass and concentrations - Dry chemical dosing flow - Chemical solutions density database - Water properties (viscosity, density) - Gases properties (density and molecular weight) - Oxygen solubility in water - Multiple streams blending - Specific gravity, Baumé, Brix and API relations Adsorption and Ion Exchange - Sorption/Exchange capacity - Empty Bed Contact Time and BV/h - Ion Exchange regeneration - Ion Exchange softener design Filters and membranes (Reverse Osmosis, Ultrafiltration and Nanofiltration) - Cylindrical filter rate and speed - Microfiltration / Ultrafiltration comparison and normalization - Reverse Osmosis membranes and datasheets comparison - Reverse Osmosis plant normalization and performance comparison - Reverse Osmosis / NF skid design - Recovery - Recovery for membranes in series - Normalized permeability - Granular media head loss (sand, resins, anthracite, carbon and custom) - Granular media backwash expansion rate Reactions - pH equilibrium for: Ammonia, Sulfates, Boric Acid, Sulfides, Silicic Acid, Phosphates and Nitrous Acid - Equilibrium for Carbonates with temperature dependence - Disinfection with Chlorine, Chlorine Dioxide, Chloramines and Ozone - Disinfection with Chlorine for Giardia Cysts - Disinfection with UV - Iron oxidation and precipitation - Manganese oxidation and precipitation - Sludge from chemicals - Food-to-microorganisms ratio - F/M - Ultimate BOD Clarifiers - Surface loading rate - circular - Surface loading rate - rectangular - Hydraulic retention time - HRT - Solids retention time - SRT - Solids loading rate - Volumetric solids loading rate - Return activated sludge recycle - RAS - Discrete sedimentation - Sludge concentration and mass - Sludge age Finance - Ordinary annuity - Annuity due - Compound annual growth rate - CAGR - Interest rate conversions - Simple interest

vPass VMS provides users with the functionality to invite visitors using their contacts on their phone. The app provides the functionality to send invitations via SMS, iMessage or WhatsApp. Visitors are then providing with a PAC ( Personal Access Code) to quickly gain access to the premises. Additional features include : * Message inbox for courtesy entry and exit notifications and newsletters