Clean interface
A straightforward experience that reduces friction in daily work.
Lightweight CRM / business management app

A lightweight CRM for small teams and independent professionals to manage clients, follow-ups, and day-to-day business information.
View on the App Store
The product qualities that matter most in day-to-day use.
A straightforward experience that reduces friction in daily work.
Contacts, business information, and follow-up activity stay in one workflow.
Structured around a local-first approach for practical business use.
Supports cleaner data movement and operational continuity.
Aligned with v26.1.1, ClientStack now runs on a reminder-first workflow with event support, project linking, iCloud file sync, and upgraded notifications.
Built for small teams and independent professionals who manage clients, reminders, events, and project-linked work.
Used for daily client follow-up, reminder/event scheduling, and project-based coordination in one lightweight flow.
Live on the App Store, with the current cycle focused on v26.1.1 improvements across tasks, files, projects, and notifications.
Three views that show real product use.



Local data storage
Authentication and storage
Smoother native experience
We provide custom CRM and business system development tailored to different industries and workflows.