Modern business systems, shipped with taste

Sharp software for teams that move fast.

With 40 years of software engineering behind the work, Seald Apps builds focused products and advisory services for teams that need clarity, speed, and durable systems.

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40
Years of engineering
5
Focused products
100%
Local-first mindset
The Rustly dashboard showing total cost, tokens processed, cache hit ratio and recent coding-agent sessions New: Rustly, local observability for coding agents

SEALD APPS LLC turns deep engineering judgment into usable business tools: see what your coding agents really cost, know the moment a site goes down, catch vulnerabilities early, and ship polished scheduling components without dragging a heavy stack behind you.

Products

Products with a clear job.

Each product is built around a practical pressure point: understand your AI spend, inspect what images reveal, organize your work, know when sites fail, and trust your code before it ships.

Observability for coding agents

Rustly

See where your coding agents spend tokens, context and money. Then fix it.

Rustly sits between Claude Code, Codex, Cursor or any other coding agent and its provider, records every request into a local database, and shows exactly which turn broke the prompt cache, which tool schemas nobody calls, and what work was done twice. One binary. Nothing leaves your machine.

  • Cache-break detection, per turn
  • Unused tool schema and context growth analysis
  • Accurate cost and quota reporting
  • No account, no cloud, no telemetry
Visit rustly.ai Live demo

macOS and Linux · 14-day free trial · One-time licence

Rustly dashboard overview

Operations

Monitor

A compact Rust application you install to watch website availability and send transition-based email alerts. Quiet by design: one email when a site goes down, one when it recovers.

  • HEAD checks with GET fallback
  • Quiet outage and recovery alerts
  • Runs cleanly on a Mac mini
Download zip · 3 MB

Security

Deepguard

AI-assisted code security scanning for teams that want vulnerability signals early, before issues become release blockers.

  • Static analysis oriented workflow
  • Developer-friendly vulnerability review
  • Built for modern application codebases
Download zip · 102 MB

Image privacy

AI Scrubber

See what an image reveals about its AI origin, then remove that metadata before you share it.

Drop an image into AI Scrubber to inspect its AI provenance and embedded metadata. Clean it with one click and save a new, shareable copy. The original image is never changed.

  • Simple drag-and-drop inspection
  • Detects AI provenance and metadata signals
  • Cleans the image and saves a separate copy
  • Runs entirely on your device
Download zip · 124 MB

On-device · Private by design · Original remains untouched

AI Scrubber showing detected AI provenance metadata and the option to clean the image

Productivity

Notebook

A private daily journal for everything you do across your projects. Type or speak a note, and find it again in seconds.

  • Notes and to-dos organized by project
  • On-device voice-to-text transcription
  • Fast search across projects and days
Download zip · 116 MB

macOS Apple silicon · Local-first

Notebook app with project notes, voice-to-text and search

Services

Advisory work with a clear view of cost and risk.

01

Privacy Security Audit

A detailed scan of what could happen when your system is broken into: which customer or consumer privacy data could leak, whether sensitive data is encrypted correctly, and what needs to change.

  • Breach impact mapping
  • Privacy data exposure review
  • Encryption and handling advice
02

Architecture Consult

Many companies and startups know the business problem but not where the technical foundation should begin. Our 40 years of experience guide you toward scalable, affordable software and hardware architecture.

  • Pragmatic system blueprinting
  • Scalable software and hardware choices
  • Cost-aware launch and growth path
03

Workshop AI Driven Development

Learn how to use AI-driven development efficiently, from agent workflows and code review discipline to avoiding the costly mistakes we already made before.

  • Practical AI development workflows
  • Human review and quality gates
  • Patterns that save time without losing control

How we build

Modern where it matters. Simple where it pays.

We like systems that are fast, inspectable, and pleasant to operate. That means strong defaults, lean dependencies, and interfaces that respect the person using them.

01

Business-first architecture

We start with the workflow and shape the technical system around it, so the software feels direct instead of inflated.

02

Rust and web foundations

Performance-sensitive services, reliable CLIs, secure APIs, and clean static interfaces that stay understandable after launch.

03

Local-first, privacy by default

Tools that keep data on your machine: no accounts, no cloud round trips, no telemetry, for organizations that care about control.

04

Interfaces people can scan

Dense operational views, responsive layouts, and component behavior that works on desktops, phones, and touch surfaces.

Pure JavaScript components

Complex planning UI, no framework required.

Calendar and Gantt components built in vanilla JavaScript for products that need scheduling power without a bundled opinion about the rest of the application.

Calendar

Vanilla Calendar

Month, week, day, list views, event editing, selection, localization, and touch-friendly behavior in plain JavaScript.

Download zip · 85 KB

Gantt

Vanilla JS Gantt

Dependency arrows, progress bars, drag behavior, multiple view modes, dark mode, and accessible keyboard surfaces.

Download zip · 17 KB

SEALD APPS LLC

Build the business tool you wish already existed.

Bring the operational problem, product idea, or technical bottleneck. We will help turn it into a clean system people can actually use.

Email us
Registered office SEALD APPS LLC 7901 4TH ST North # 300 St Petersburg, FL 33702 United States [email protected]