HourHackLive
Mobile utility
A simple, ad-free time calculator for time differences, date differences, and time zone conversions.
Practical software for focused workflows.
Rosenbergs LLC builds web apps, mobile apps, and developer tools with a focus on useful interfaces, pragmatic engineering, and clear privacy practices.
Featured Apps
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RegistroPreparing
Private location history app
A local-first location-history app that stores GPS history on device, supports background tracking, daily route review, trips, import from Google Timeline, and export to JSON, GPX, and KML.
SEPTA TrackerPlanned
Transit tracking app
Live SEPTA vehicle tracking for Regional Rail, subway, trolley, and bus routes using SEPTA public endpoints, map views, route selection, and live refresh.
Fitness AppLive
Fitness training management platform
A public-facing trainer and trainee fitness platform. Trainers create training plan templates, assign plans, manage trainees, and monitor progress. Trainees view assigned plans, complete sessions, and log body metrics.
Current Roadmap
Registro
Preparing for App Store submission
SEPTA Tracker
Planned next after Registro
What We Build
Mobile Apps
Native iOS and Android apps with practical features and clear privacy practices.
Web Apps
Full-stack web applications with modern interfaces and reliable backends.
Internal Tools
Developer utilities and workflow tools that solve real problems.
Software Prototypes
Product experiments and proof-of-concept builds for new ideas.
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