Developer expands LabBench to 9 engineering tools and launches exam prep platform PrepBench

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A solo developer has expanded LabBench, a browser-based engineering tool suite, from four to nine tools by adding an EV Battery Management Simulator and a Smart Energy Meter Dashboard. The battery simulator models a 4-cell pack with state-of-charge tracking, thermal management, and passive cell balancing, while the energy meter dashboard computes real-time power metrics and billing. Both new tools integrate with the existing Supabase authentication and Pro-tier save/load system already used across the suite. Separately, the developer also launched PrepBench, a free aptitude exam preparation platform covering topics like percentages, probability, and geometry, with instant feedback and a streak tracker requiring no sign-up. Both projects are open source under a source-available license, with code publicly available on GitHub.

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