https://techconcepts.org/blog/ Build stories, architecture decisions, and lessons from shipping real products. iOS development, App Store optimization, and automation. en Fri, 25 Apr 2026 08:00:00 +0200 eg@techconcepts.org (Evgeny Goncharov) eg@techconcepts.org (Evgeny Goncharov) 2026 TechConcepts. All rights reserved. https://techconcepts.org/evgeny.jpg https://techconcepts.org/blog/ https://techconcepts.org/blog/automating-app-store-screenshots-simulator-python.html https://techconcepts.org/blog/automating-app-store-screenshots-simulator-python.html How we automate App Store screenshot capture across 27 apps using xcrun simctl, SCREENSHOT_MODE UserDefaults injection, screencapture -l, and a Python batch pipeline for iPhone 16 Pro Max at 1320x2868. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 DevOps https://techconcepts.org/blog/app-store-keyword-optimization-27-apps.html https://techconcepts.org/blog/app-store-keyword-optimization-27-apps.html Practical ASO for a 27-app portfolio: the 100-character keyword limit, locale contamination, avoiding competitor brands, batch validation, and metadata strategy for quiz apps vs utility apps. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 ASO https://techconcepts.org/blog/macos-menu-bar-swiftui-nspopover.html https://techconcepts.org/blog/macos-menu-bar-swiftui-nspopover.html How to build a macOS menu bar app with SwiftUI inside NSPopover. NSStatusItem setup, contentSize clipping, @Observable environment not crossing .sheet() boundaries, and the Settings scene blank render problem. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 macOS https://techconcepts.org/blog/xcodegen-multi-platform-projects.html https://techconcepts.org/blog/xcodegen-multi-platform-projects.html How we use XcodeGen to manage 27 iOS and macOS apps from project.yml files. Multi-platform targets, scheme management, paid-analogue compile flags, and the gotchas nobody warns you about. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 DevOps https://techconcepts.org/blog/storekit2-subscriptions-practice.html https://techconcepts.org/blog/storekit2-subscriptions-practice.html Practical StoreKit 2 implementation for iOS and macOS apps. Transaction.updates listener, subscription state machine, grace period handling, sandbox testing, and the gotchas Apple's docs skip. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 Monetization https://techconcepts.org/blog/privacy-first-analytics-telemetrydeck-vs-firebase.html https://techconcepts.org/blog/privacy-first-analytics-telemetrydeck-vs-firebase.html Why we chose TelemetryDeck over Firebase Analytics for 27 iOS and macOS apps. PrivacyInfo.xcprivacy requirements, GDPR compliance, and real implementation patterns. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 Privacy https://techconcepts.org/blog/wattora-entso-e-electricity-prices.html https://techconcepts.org/blog/wattora-entso-e-electricity-prices.html How we built Wattora, an iOS and macOS app that fetches hourly electricity spot prices from ENTSO-E. API architecture, XML parsing in Swift, WidgetKit timelines, and the caching strategy behind 30+ European bidding zones. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 Build Story https://techconcepts.org/blog/paid-alternatives-to-free-apps.html https://techconcepts.org/blog/paid-alternatives-to-free-apps.html The paid-analogue strategy: why we ship one-time purchase versions of our free subscription apps, how compile guards keep one codebase, and what it means for users who hate subscriptions. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 Monetization https://techconcepts.org/blog/shared-swift-package-architecture.html https://techconcepts.org/blog/shared-swift-package-architecture.html How a single Swift Package powers 27 iOS and macOS apps. Architecture decisions, shared components, and the trade-offs of extreme code reuse at scale. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 Architecture https://techconcepts.org/blog/quiz-app-template-to-8-apps.html https://techconcepts.org/blog/quiz-app-template-to-8-apps.html How a single quiz app template became 8 country-specific exam prep apps for the UK, Germany, Italy, France, and Switzerland. The architecture, content pipeline, and localization decisions behind scaling a quiz app across markets. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 Architecture https://techconcepts.org/blog/ios-localization-38-languages.html https://techconcepts.org/blog/ios-localization-38-languages.html A practical guide to localizing iOS and macOS apps at scale. String Catalogs (.xcstrings), runtime language switching without restart, the Bundle override pattern, and enum localization gotchas in SwiftUI. eg@techconcepts.org (Evgeny Goncharov) Sat, 25 Apr 2026 08:00:00 +0200 Localization https://techconcepts.org/blog/jira-sla-automation.html https://techconcepts.org/blog/jira-sla-automation.html How a 50-person engineering team went from manual SLA tracking in spreadsheets to automated Jira routing and alerts -- and cut first-response time from 8h to 2.8h. eg@techconcepts.org (Evgeny Goncharov) Wed, 22 Apr 2026 08:00:00 +0200 Automation https://techconcepts.org/blog/ai-api-cost-production.html https://techconcepts.org/blog/ai-api-cost-production.html Four concrete techniques that cut AI API costs by 90% or more in production systems -- model selection, prompt compression, semantic caching, and batch processing. eg@techconcepts.org (Evgeny Goncharov) Wed, 22 Apr 2026 08:00:00 +0200 Optimization https://techconcepts.org/blog/cost-of-manual-ticket-triage.html https://techconcepts.org/blog/cost-of-manual-ticket-triage.html Manual IT ticket triage costs engineering teams more than they realise. Here's how to calculate your actual cost and the three automation steps that eliminate it. eg@techconcepts.org (Evgeny Goncharov) Wed, 22 Apr 2026 08:00:00 +0200 Operations https://techconcepts.org/blog/slack-bot-jira-routing.html https://techconcepts.org/blog/slack-bot-jira-routing.html Step-by-step: build a Slack bot that creates and routes Jira tickets using AI classification. Real code, real architecture, production-tested on 3 workspaces. eg@techconcepts.org (Evgeny Goncharov) Wed, 22 Apr 2026 08:00:00 +0200 Tutorial https://techconcepts.org/blog/linkedin-commenting-strategy.html https://techconcepts.org/blog/linkedin-commenting-strategy.html Data-backed LinkedIn commenting strategy: who to comment on, what to write, and how comments convert to followers. From 0 to 100K followers playbook. eg@techconcepts.org (Evgeny Goncharov) Fri, 03 Apr 2026 08:00:00 +0200 Growth https://techconcepts.org/blog/cscs-card-test-guide.html https://techconcepts.org/blog/cscs-card-test-guide.html Everything you need to know about the CSCS health and safety test: 50 questions, 94% pass mark, what's covered, and how to prepare. Plus the app I built. eg@techconcepts.org (Evgeny Goncharov) Fri, 27 Mar 2026 08:00:00 +0100 Guide https://techconcepts.org/blog/einbuergerungstest-vorbereitung.html https://techconcepts.org/blog/einbuergerungstest-vorbereitung.html Everything you need to know about the German Einbuergerungstest: 310 official questions, state-specific section, exam format, and what to study. Plus the app. eg@techconcepts.org (Evgeny Goncharov) Fri, 27 Mar 2026 08:00:00 +0100 Guide https://techconcepts.org/blog/examen-civique-preparation.html https://techconcepts.org/blog/examen-civique-preparation.html Everything you need to know about France's naturalisation civics exam: format, topics, common mistakes, and study strategy. Plus the free app I built for it. eg@techconcepts.org (Evgeny Goncharov) Fri, 27 Mar 2026 08:00:00 +0100 Guide https://techconcepts.org/blog/fischerpruefung-vorbereitung.html https://techconcepts.org/blog/fischerpruefung-vorbereitung.html Everything you need to know about the German Fischerpruefung: topics, format, common mistakes, and study strategy. Plus the app I built for it. eg@techconcepts.org (Evgeny Goncharov) Fri, 27 Mar 2026 08:00:00 +0100 Guide https://techconcepts.org/blog/quiz-patente-guida-esame.html https://techconcepts.org/blog/quiz-patente-guida-esame.html Everything you need to know about Italy's patente B exam: questions, format, common mistakes. Plus the story of building a full quiz app in SwiftUI. eg@techconcepts.org (Evgeny Goncharov) Fri, 27 Mar 2026 08:00:00 +0100 Guide https://techconcepts.org/blog/patente-nautica-guida-esame.html https://techconcepts.org/blog/patente-nautica-guida-esame.html Complete guide to the Italian patente nautica: two licence types, exam format, hardest topics, and how to study. Plus the app I built for it. eg@techconcepts.org (Evgeny Goncharov) Fri, 27 Mar 2026 08:00:00 +0100 Guide https://techconcepts.org/blog/ai-search-vs-seo.html https://techconcepts.org/blog/ai-search-vs-seo.html 50M+ people search via ChatGPT. Ranking on Google no longer means being cited by AI. Here's what the new playbook looks like and how to get into AI answers. eg@techconcepts.org (Evgeny Goncharov) Tue, 24 Mar 2026 08:00:00 +0100 GEO https://techconcepts.org/blog/geo-checklist.html https://techconcepts.org/blog/geo-checklist.html The practical GEO checklist for business owners. 7 fixes that help ChatGPT, Perplexity, and Google AI Overviews actually find and cite your business. eg@techconcepts.org (Evgeny Goncharov) Tue, 17 Mar 2026 08:00:00 +0100 GEO https://techconcepts.org/blog/geo-audit-case-study.html https://techconcepts.org/blog/geo-audit-case-study.html I ran a full AI search visibility audit on my own site. Here's every problem I found and the 8 fixes that took less than a day to implement. eg@techconcepts.org (Evgeny Goncharov) Tue, 10 Mar 2026 08:00:00 +0100 GEO https://techconcepts.org/blog/book-spin-selling.html https://techconcepts.org/blog/book-spin-selling.html Book review of SPIN Selling by Neil Rackham. How the SPIN framework changed the way I sell automation, Jira optimization, and technical consulting services. eg@techconcepts.org (Evgeny Goncharov) Sat, 07 Mar 2026 08:00:00 +0100 Book Review https://techconcepts.org/blog/book-deep-work.html https://techconcepts.org/blog/book-deep-work.html A solo consultant's review of Deep Work by Cal Newport. How time-blocking, shutdown rituals, and eliminating Slack noise doubled my meaningful output. eg@techconcepts.org (Evgeny Goncharov) Sat, 07 Mar 2026 08:00:00 +0100 Book Review https://techconcepts.org/blog/book-100m-offers.html https://techconcepts.org/blog/book-100m-offers.html A consultant's honest review of Alex Hormozi's $100M Offers. How the Value Equation changed the way I package Jira optimization, fund ops, and email forensics. eg@techconcepts.org (Evgeny Goncharov) Sat, 07 Mar 2026 08:00:00 +0100 Book Review https://techconcepts.org/blog/google-search-console-guide.html https://techconcepts.org/blog/google-search-console-guide.html Complete Google Search Console setup guide. Verification, sitemap submission, and what to monitor. From zero to tracking keyword rankings. eg@techconcepts.org (Evgeny Goncharov) Wed, 25 Feb 2026 08:00:00 +0100 Tutorial https://techconcepts.org/blog/lead-magnet-strategy.html https://techconcepts.org/blog/lead-magnet-strategy.html How I built 15 interactive lead magnets in 7 days. Calculator design patterns, email capture, GA4 tracking. Free tools beat gated PDFs. eg@techconcepts.org (Evgeny Goncharov) Wed, 25 Feb 2026 08:00:00 +0100 Growth https://techconcepts.org/blog/cloudflare-pages-deploy.html https://techconcepts.org/blog/cloudflare-pages-deploy.html Complete Cloudflare Pages deployment guide. From git push to live site in under a minute. Free SSL, global CDN, unlimited bandwidth. eg@techconcepts.org (Evgeny Goncharov) Wed, 25 Feb 2026 08:00:00 +0100 DevOps https://techconcepts.org/blog/mbox-converter.html https://techconcepts.org/blog/mbox-converter.html How I built a Google Vault MBOX to EML converter in 30 minutes using Claude Code. 82 lines of Python, 50K+ emails converted. Full build story. eg@techconcepts.org (Evgeny Goncharov) Thu, 15 Jan 2026 08:00:00 +0100 Build Story https://techconcepts.org/blog/multi-tenant-slack-bot.html https://techconcepts.org/blog/multi-tenant-slack-bot.html How I built a single Slack bot that serves three workspaces. Architecture, OAuth flow, config-driven routing, and lessons from production. eg@techconcepts.org (Evgeny Goncharov) Sat, 10 Jan 2026 08:00:00 +0100 Architecture https://techconcepts.org/blog/ai-api-cost-optimization.html https://techconcepts.org/blog/ai-api-cost-optimization.html How I cut AI API costs from $100/month to $2/month. Model selection, caching, and the debugging session that saved 98% on Claude API bills. eg@techconcepts.org (Evgeny Goncharov) Sat, 20 Dec 2025 08:00:00 +0100 Optimization