HydroCalc Plus vs Datum

The COMPLETE version of HydroCalc, with what the free app doesn't have: the FITTINGS SELECTOR. Pick elbows, valves, tees and reducers piece by piece and the app computes minor losses for you — in the calculator, the inverse calculator and the system curve. No K-value tables, no transcription errors. ALL INCLUDED: pump power, system curve, pipe database and Darcy-Weisbach with real fluids come with the app. One purchase, no in-app purchases. Professional hydraulic engineering tool for calculating pressure losses in piping systems. Essential for engineers, plumbers, and contractors designing water distribution networks. Key Features: Calculate friction head losses using industry-standard Hazen-Williams equation Support for both US (ft, gpm, psi) and SI (m, lps, bar) units Extensive pipe material library with pre-defined roughness coefficients (C-factors) Complete fittings and valves database including elbows, tees, valves, contractions, and expansions Inverse calculations to determine optimal pipe diameter, flow rate, or length for target head loss Real-time results showing velocity, friction loss, minor losses, and total system head loss What Sets Plus Apart: Unlike basic calculators, HydroCalc Plus accounts for both major losses (pipe friction) and minor losses (fittings and valves). The app includes a comprehensive database of K-factors for various components, allowing accurate total system pressure loss calculations. Perfect For: Water supply system design Irrigation network planning HVAC piping calculations Fire protection systems Industrial fluid transport Educational purposes in hydraulic engineering Technical Capabilities: The app considers all critical factors affecting pressure loss: flow velocity, pipe diameter, internal roughness, pipe length, and fitting configurations. Materials include PVC, polyethylene, steel, cast iron, concrete, and more with accurate C-factors ranging from 120-150. Inverse Calculation Mode: Unique feature allowing backward calculations - determine required pipe size for allowable head loss, maximum flow capacity, or optimal pipe length for your system constraints. Simple, intuitive interface with instant results. No internet connection required. Professional-grade calculations in your pocket. Note: the advanced modules are available in English and Spanish.

Datum is the private way for couples to track intimacy, discover relationship patterns, and build a stronger connection together. Log moments in seconds. Visualize trends over time. Share a private relationship timeline with your partner and stay connected through meaningful insights. TRACK YOUR RELATIONSHIP Quick and discreet logging on a beautiful calendar designed for couples. View your relationship history by day, month, or year and see your journey at a glance. DISCOVER PATTERNS Understand your relationship through trends, analytics, and insights. See how frequency changes over time and identify patterns that help strengthen your connection. PARTNER SHARING Connect with your partner using a simple invite code. Share a calendar, view a combined relationship timeline, and stay automatically synchronized. One Datum Premium subscription unlocks Partner Sharing for both partners. PRIVATE BY DESIGN Your relationship data stays private. Protect the app with Face ID or Touch ID. No social feeds, no public profiles, and no sharing outside of the people you choose. DATUM PREMIUM Unlock advanced features including Partner Sharing, Calendar History, Relationship Insights, and Progress Tracking. Available subscriptions: • Weekly Plan — $2.99 per week • Yearly Plan — $29.99 per year Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current billing period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscription at any time through your App Store account settings. Privacy Policy: https://www.scale9dev.com/privacy-policy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/