Apps & Developer Tools

Native apps and tools across macOS, iOS, web, Chrome, and Jira Cloud. Each one solves a real problem I ran into while building software for clients.

Apple Apps

Native SwiftUI apps for macOS and iOS. No Electron, no cross-platform wrappers.

Claude Battery – track Claude Code usage

Claude Battery

Track Claude Code API usage from your menu bar. Real-time token consumption, rate limit status, daily cost trends.

macOS · Free
App Store Details
Wattora – real-time electricity prices

Wattora

Know exactly when electricity is cheapest — and plan your day around it.

iOS / macOS · Free
App Store Details
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PARA Mail

Organise your inbox with the PARA method: Projects, Areas, Resources, and Archive.

macOS · Free
Mac App Store Details
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CCSE 2026

Prepare for the CCSE exam with all 300 official questions from the Instituto Cervantes manual. Ad-free.

iOS / macOS / watchOS · Free
App Store Details
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eXpense

A simple expense tracker for logging cash spending, with budget and spending management.

iOS / macOS / watchOS · Free
App Store Details
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Phygital Timer

Interval timer with Pomodoro, HIIT, and meditation modes in one app.

iOS / macOS · Free
App Store Details
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Email Converter

Turns Mbox and ZIP archives into individual EML files for Outlook. Processing stays on your Mac.

macOS · $8.99
Mac App Store Details
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Mbox Splitter Pro

Split .mbox files into individual .eml emails on your Mac.

macOS · $7.99
Mac App Store Details
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Tempus Time

Offline work-hours log for freelancers: clients, projects, and hourly rates.

iOS / macOS
App Store Details

Exam & Quiz Apps

Native iOS and macOS apps for official government exams. All questions sourced from official authorities — no guessing, no outdated material.

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Quiz Patente

Pass the Italian driving licence (Patente B) test on your first try.

iOS / macOS · Free
App Store Details
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Patente Nautica

Prepare for the Italian boat licence exam with the official MIMS question bank.

iOS / macOS · App Store
App Store Details
🎣

Fischerprüfung

Prepare for the Bavarian fishing exam with the official questions and practice tests.

iOS / macOS · Free
App Store Details
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CSCS Card Quiz

Pass the UK CSCS construction safety card test with the CITB question bank and mock exams.

iOS / macOS · Free
App Store Details
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Einbürgerungstest

German citizenship test prep. 460 questions in the BAMF catalogue, 310 for your state (300 general + 10). Free to download. Premium: 2,99 € a month or 19,99 € a year, each with a 7-day free trial.

iOS / macOS · Subscription
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Examen Civique

Prepare for the French civic exam and naturalisation test: Republic values, history, institutions, and life in France.

iOS / macOS · Free
App Store Details
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SitePass

CSCS mock-exam prep for UK construction workers, with operative, specialist, and MAP banks.

macOS
Mac App Store Details
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AutoCoach

UK driving theory practice: road signs, permit questions, and progress tracking.

macOS
Mac App Store Details
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NautiCoach

Boat-licence study: maritime rules, navigation, and timed simulations.

macOS
Mac App Store Details

Chrome Extensions

Browser tools for email, privacy, and investment research.

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Email Exporter

Export emails to PDF from Gmail, Outlook, Yahoo. All processing happens in your browser — privacy-first, no data leaves your machine.

Chrome · Free
Add to Chrome Details

Jira & Developer Tools

Automation tools for Jira Cloud and Claude Code workflows.

AI Ticket Classifier in Jira
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AI Ticket Classifier

Auto-classify Jira tickets with AI. Automatically sets issue type, priority, and assignee based on ticket content.

Jira Cloud · Free trial
Jira Marketplace Details
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Bulk Issue Rewriter

AI-powered bulk text editing for Jira. Rewrite summaries, descriptions, and comments across hundreds of issues at once.

Jira Cloud · Free trial
Jira Marketplace Details
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Claude Code Power Pack

70+ ready-to-use skills, 3 lifecycle hooks, and coding rules for Claude Code. Session automation, deploy workflows, content pipelines.

CLI · Free & Open Source
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Apple Mail MCP

Local MCP server giving Claude Code, Claude Desktop, and Codex access to your existing Apple Mail accounts — list, search, read, and draft. No credentials, read-only by default, account allowlist.

macOS · Free & Open Source
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Built by One Developer, Backed by Real Usage

4
Platforms
5
EU markets

Every product started as a tool I needed for a real project. No venture funding, no team of 50 — just focused engineering solving one problem at a time.

Frequently Asked Questions

Are these products free?

Many have a free tier. Some offer a paid unlock.

Who builds these products?

All products are built by Evgeny Goncharov, building TechConcepts. Previously at a major search platform and Big 4 Advisory. Every product solves a real problem encountered during consulting work.

Can you build a custom product for my business?

Yes. Native iOS/macOS apps, Chrome extensions, Jira Cloud apps, and web tools. Fixed pricing, full code ownership. Book a 20-minute discovery call to discuss.

What platforms do you develop for?

macOS and iOS (SwiftUI), Chrome browser extensions, Jira Cloud marketplace apps, and developer CLI tools. All native technologies — no cross-platform wrappers.

Need a custom product built?

I build products for founders and teams. Fixed pricing, full code ownership, 2-8 week delivery.

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