Application Development
Desktop tools, web apps, internal utilities, data dashboards, and workflow software for operational use.
Application Development • Cybersecurity Support • Advertising Monitoring
Software, security support, and ad monitoring for lean teams.
Silent Core Ltd builds practical applications and operational systems. 77FX 2.1.7 is our free Windows exchange-rate and operations app, while 77ads supports Meta Ads monitoring.
Application development
77FX and custom tools
Desktop utilities, internal dashboards, websites, and workflow software built for real operational use.
Cybersecurity support
Hardening, checks, and response
Practical technical support for account security, server exposure, website risk, and incident follow-up.
Advertising monitoring
77ads for Meta campaigns
Ad account reporting, campaign health checks, asset visibility, and validate-only management workflows.
What we do
Core services
Application delivery, security support, and advertising operations for businesses that need working systems.
Cybersecurity Technical Support
Security hardening, access review, server checks, web risk triage, and practical remediation guidance.
77ads Advertising Monitoring
Meta Ads reporting, campaign review, asset scope checks, and safer validate-only management preparation.
Website & Operations Delivery
Corporate sites, landing pages, automation, structured data flows, and maintainable business interfaces.
Flagship software
77FX for Windows
A free Windows utility for currency conversion, world clocks, and operational cost visibility. 77FX 2.1.7 is available now — no subscription required. API keys are user-supplied inside the app.
01
Currency rows that move together
Update one amount and the entire visible currency workspace refreshes instantly.
02
Bring your own APIs
Wise API and AI provider credentials are configured by the user — not hardcoded into the package.
03
Budget-aware dashboard
AI subscriptions, server costs, debt, and income in one screen — before monthly spending drifts.
Live Interface
The dashboard in daily use
Recurring spend, net income, debt due this month, mini rates, server latency, and timeline events — all without switching tools.
Security and ads operations
Technical support around the systems that make money and carry risk.
We support practical security checks and advertising monitoring without forcing teams into heavyweight enterprise tooling.
Cybersecurity Support
Account access review, server exposure checks, website security triage, incident cleanup guidance, and operational hardening.
Infrastructure Checks
DNS, SSL, web server, application surface, login flow, and monitoring review for small teams running live services.
77ads Monitoring
A simple public entry page and Meta login flow for campaign reporting, ad account insights, and management validation.
Visitor Access
Google visitor login and real-user visit tracking connect website activity to authenticated sessions where users choose to sign in.
About
Silent Core Ltd
Registered in England and Wales. We focus on application development, cybersecurity technical support, advertising monitoring, and digital business systems that support real work.
Direct engineering approach: build the product, package it properly, and deploy it in a form that users can actually operate.
Company Number: 16587966