Apps & Developer Tools

20 products across macOS, iOS, 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

Real-time electricity prices for Italy, Czech Republic, Slovenia, Slovakia, and Greece. Price alerts, widgets, hourly rate comparisons.

iOS / macOS · Free
App Store Details
📬

PARA Mail

Organize email using the PARA method. Automatically categorize messages across all your accounts into Projects, Areas, Resources, and Archive.

macOS · Free
Mac App Store Details
🇪🇸

CCSE 2026

Prepare the Spanish citizenship exam with all 300 official questions from Instituto Cervantes. Practice by topic, mock exams, Apple Watch support.

iOS / macOS / watchOS · Free
App Store Details
💰

eXpense

Simple expense tracking with AI receipt scanning, multi-currency support, and budget reports. Log spending in 5 seconds.

iOS / macOS / watchOS · Free
App Store Details
⏱️

Phygital Timer

Chess clock meets productivity timer. Pomodoro, custom presets, haptic feedback, and Apple Watch support in one app.

iOS / macOS · Free
App Store Details
✉️

Email Converter

Convert MBOX, EML, and EMLX email files on your Mac. Batch processing, drag-and-drop, metadata preservation.

macOS · $8.99
Mac App Store Details
📬

Mbox Splitter Pro

Split large MBOX archives into individual EML files. Handle multi-GB mailbox exports with ease.

macOS · $7.99
Mac 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 All questions sourced from official authorities — no guessing, no outdated material.

🚗

Quiz Patente

Italian driving licence (patente B) exam prep. All official questions with explanations, topic-based practice, and timed mock exams.

iOS / macOS · Coming Soon
Coming Soon Details
⛵

Patente Nautica

Italian nautical licence exam prep. Full official question bank for both coastal and offshore licences, with explanations and mock tests.

iOS / macOS · Coming Soon
Coming Soon Details
🎣

Fischerprüfung

German fishing licence (Fischereischein) exam prep. All official state exam questions with explanations, covering fish species, ecology, and regulations.

iOS / macOS · Free
App Store Details
👷

CSCS Card Quiz

UK CSCS health & safety card exam prep. Full official question bank covering site safety, first aid, PPE, and working at height.

iOS / macOS · Coming Soon
Coming Soon Details
🇩🇪

Einbürgerungstest

German naturalisation test prep. 300+ official questions from the federal Einbürgerungstest, covering law, democracy, history, and culture.

iOS / macOS · Free
App Store Details
🇫🇷

Examen Civique

French naturalisation civics exam prep. 300+ questions on Republic values, history, institutions, and fundamental rights.

iOS / macOS · Coming Soon
Coming Soon Details

Chrome Extensions

Browser tools for email, privacy, and investment research.

📤

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
EU Shield VPN – connected to Amsterdam

EU Shield VPN

Secure VPN with 7 EU server locations. 256-bit encryption, zero activity logs, 10GB free monthly data. No registration required.

Chrome · Free tier
Add to Chrome Details
📊

VC Deal Analyzer

AI-powered investment analysis for VCs. One-click company scoring (0-100), SEC filings, patent data, and Sequoia-style PDF investment memos.

Chrome · Free
Add to Chrome Details

Jira & Developer Tools

Automation tools for Jira Cloud and Claude Code workflows.

AI Ticket Classifier in Jira
🎯

AI Ticket Classifier

Auto-classify Jira tickets with AI. Automatically sets issue type, priority, and assignee based on ticket content. 92% accuracy on real-world data.

Jira Cloud · Free trial
Jira Marketplace Details
✏️

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
🚀

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
View Details

Built by One Developer, Backed by Real Usage

16
Products shipped
4
Platforms
92%
AI accuracy
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?

Most have a free tier. Claude Battery, Wattora, Email Exporter, EU Shield VPN, and VC Deal Analyzer are all free to use. Some offer premium features through subscriptions or one-time purchases.

Who builds these products?

All products are built by Evgeny Goncharov, founder of TechConcepts. Previously at Yandex (Search) and EY (Advisory), Darden MBA. 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 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.

Book a Call Browse All Apps
Book a 15-min Call