Business & clients

ContactSphere

An offline personal CRM that triages who needs a follow-up today.

Windows desktop app (.exe) US$20 · one-time

ContactSphere is an offline personal CRM and follow-up manager for anyone keeping in touch with leads, clients, and contacts who wants nothing slipping through the cracks. Its hero Follow-ups screen reads each contact's follow-up date and sorts them into Overdue, Today, This week, and Upcoming, so you always know who to reach next. Logging an interaction from a card records the touch, stamps the last-contacted date, and schedules the next nudge in a single step.

It is a native single-window desktop app, not a web page or an Electron wrapper. Every record lives in a local file on your machine, with no accounts, no cloud, and no network access. A live dashboard, full contact management, editable interaction channels, and CSV export round out the package.

What it does

  • Follow-ups triage that buckets every scheduled contact by urgency into Overdue, Today, This week, and Upcoming
  • Log interaction from a card or contact, recording the touch, updating last-contacted, and scheduling the next follow-up in one step
  • Full contact management with create, edit, and delete, search across name, company, email, phone, and tags, plus Lead, Active, Dormant, and Archived status filters
  • Live dashboard with KPIs (total contacts, due this week, overdue, interactions this month) and an interactions-per-month bar chart
  • Editable interaction channels you can add, rename, or remove, leaving existing records untouched
  • CSV export of contacts and interactions, plus a Settings panel showing your local database path
US$20 one-time payment · yours to keep forever · Windows desktop app (.exe)
  • 14-day refund if it doesn't work as described — Refund Policy
  • Instant download, delivered by email — re-download anytime from your receipt
  • No subscription, no account — works fully offline
  • No activation server — the app keeps working even if this website disappears
Works on
Windows 10 & 11 (64-bit)
Download
~102 MB · ContactSphere-win64.zip
Installs
On computers you personally own or control (EULA)
Updates
Free fixes and improvements for the version you buy — notices by email, never by the app phoning home

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Safe to download & install

A genuine, local-first desktop app — no telemetry, no account. Because we're a new independent maker, Windows may show a one-time SmartScreen prompt on first run; just click More info → Run anyway. Your download lists a SHA-256 checksum so you can verify it's authentic and untampered. How to install & verify →

SHA-256 · ContactSphere-win64.zipee41e0a253f097b65710b1e18da122a24d029588ff0727c9a8c3486321121f5b