This app allows users to build and test transformer bank connections virtually. Users can wire components, set voltages, and instantly see the results, learning through hands-on experimentation without real-world consequences.





250+ iOS apps curated and reviewed
The best top hand transformer lab apps on iPhone average 4.5★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | $9.99 | 5.0★ (2) | No | No | Aug 2026 | |
| 2 | $19.99 | 4.5★ (270) | No | No | Aug 2026 | |
| 3 | Free | — | No | Yes | May 2026 | |
| 4 | Free | — | No | Yes | Jun 2026 | |
| 5 | Free | 4.8★ (47) | Yes | Yes | Aug 2026 | |
| 6 | Free | — | No | Yes | Jul 2026 | |
| 7 | Free | — | No | Yes | Jun 2026 | |
| 8 | Free | — | No | No | Aug 2026 |





This app allows users to build and test transformer bank connections virtually. Users can wire components, set voltages, and instantly see the results, learning through hands-on experimentation without real-world consequences.






This interactive simulator allows users to study and learn transformer connections. Test your wiring with various meters, and experience consequences of improper connections. Includes reference diagrams, informational material, and a quiz mode to test knowledge.








This app simplifies transformer calculations for engineers and students. It accurately computes primary and secondary currents, turns ratios, and secondary voltages based on user inputs for transformer ratings and winding turns.








This app simplifies the calculation of power and audio transformers for DIY electronics projects, particularly tube amplifiers. It handles various transformer types and core configurations with user-friendly input of voltages, currents, or impedances. Enhanced features offer more capabilities than traditional spreadsheet calculators.




This app calculates electrical transformer performance metrics like current, voltage, efficiency, and regulation. It also offers SI/Metric conversions for various physical quantities and includes a tool for estimating ship dates based on order time.




This app provides electrical and computer engineering tools for professionals and hobbyists. It offers circuit design, simulation, component libraries, and measurement functionalities for on-the-go use.


Analyze electronic circuits with DC, AC, multifrequency AC, and transient analysis. Draw circuits graphically, modify component parameters, and view voltage and current graphs. Supports various components and offers video tutorials for each.






This app provides hands-on learning for HVAC professionals, covering fundamentals, core and advanced systems, and EPA 608 certification prep. It features interactive diagrams, simulators, real-world challenges, and quick reference tools for on-the-job use.


Calculate conduit fill and size based on NEC guidelines for copper and aluminum building wire. Determine the maximum number of conductors for a given raceway or the required raceway size for specific conductors.




This comprehensive mobile toolkit provides electricians and professionals with essential calculations, NEC-compliant tools, and field utilities. It offers features for conduit bending, fill calculations, load analysis, and various electrical calculators, all designed for speed and clarity.