Phase Calc vs Gnist

Phase Calc for iOS is an advanced engineering app for most electrical designs, expecially symmetrical component analysis and three-phase power system calculations. Built for students, teachers, technicians, and engineers, it combines a polished mobile experience with a powerful technical workflow for fast, accurate analysis of unbalanced three-phase systems in the field, lab, or classroom. The app performs both phase-to-sequence and sequence-to-phase transformations, with support for inputs in polar and rectangular form. It quickly resolves three unbalanced phase quantities into their positive-, negative-, and zero-sequence components, making it a practical tool for protection studies, fault analysis, system modeling, relay validation, and coursework. More than a single-purpose calculator, Phase Calc is packed with specialized calculators, technical reference libraries, and built-in formulas to support everyday power systems work. Whether you are checking values, reviewing theory, or working through engineering problems more efficiently, the app puts essential tools in one place. Results can be exported instantly, including vector data for plotting and graphical analysis, as well as technical report exports for documentation, review, and sharing. With powerful capabilities in a streamlined interface, Phase Calc delivers a complete mobile toolkit for three-phase analysis on iPhone and iPad.

Gnist is a fast, precise calculation tool for electricians and electrical professionals - built around NEK 400 (and IEC 60364). Size cables and overcurrent protection, calculate voltage drop, short circuit and earth-fault disconnection, check selectivity, and size heating cable, EV charger, solar/PV and motor starting - all in seconds. CALCULATORS - Cable & fuse - cross-section, protection, reference method, correction factors - Voltage drop - DeltaU in percent over the cable length - Short circuit - Ik and adiabatic check - Earth fault & disconnection - Zs requirement for automatic disconnection - Selectivity - indicative assessment between protective devices - Heating cable - power and spacing by room and substrate - EV charger, solar/PV, motor starting - Basic calculator - Ohm's law, power, energy, PE, AWG - Build installations as a tree, get warnings and single-/multi-line diagrams - Save projects and export PDF LANGUAGES The app is available in Norwegian, English, Swedish and Danish. You can choose the electrical standard (NEK 400, IEC 60364, SS 436, DS/HD 60364, DIN VDE 0100, SFS 6000, BS 7671) independently of the app language. PRIVACY Everything runs locally on the device - no account, no server, no tracking. IMPORTANT Gnist is a guidance tool and does not replace independent design. All results must be checked against the current NEK 400 and manufacturer data. Terms of Use (standard Apple EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/