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.
Latest & Coming Next
Available now
Registro
Your private location timeline is now on the App Store. Rediscover your routes, trips, and everyday journeys, with your history stored on your device.
Download on the App StoreAvailable now
Golf Virtual Scorecard
Less tapping. More golfing. Keep score for your group, revisit past rounds, and share the results by text. Now available on the App Store.
Download on the App StoreFeatured Apps
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RegistroLive
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.
Golf Virtual ScorecardLive
Golf scorekeeping app
An iPhone golf scorekeeping app. Keep score for your whole group, customize hole pars, revisit saved rounds, and send everyone their results in a text.
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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