YohApps
Practical tools and creative experiments across productivity, chess, and AI.
Built by Yohann Hemery
An IT professional and independent developer exploring practical tools and creative experiments across productivity and chess.
This space is where ideas are tested, refined, and occasionally shipped.
Developer Coaching
I help founders and builders turn strong ideas into structured execution plans — from validation to first release. Clear roadmap. Real milestones. No fluff.
Project Lead
Experienced leading cross-functional initiatives across client services, endpoint environments, and regulated infrastructures. Focused on delivery, accountability, and measurable results.
Endpoints Management (Intune, Altiris)
Designing and maintaining enterprise endpoint ecosystems including lifecycle management, automation, scripting, Microsoft Graph API integrations, and security hardening.
PCI Specialist
Practical experience working within PCI-regulated environments, ensuring compliance, secure configuration management, and audit readiness across distributed systems.
Contact me
Projects In Progress
Bone & Ash Chess — Collector Edition
Early Interest?
We're exploring a limited pre-sale for Lily plush characters and the Bone & Ash chess set. If you'd be interested in early access or collector editions, reach out.
Apps
A collection of applications I've built, from live products to ongoing experiments.
Concepts
Ideas I'm exploring transparently. Some will ship, some won't—that's the process.
Dev Tools
The actual tools I use daily. No sponsorships, just honest takes.
Experience
Lessons learned, mistakes made, and occasional wins along the indie dev journey.
Forum
A space for discussion and community (coming soon).
About
I'm an independent developer focused on building useful software. No venture funding, no growth hacks—just thoughtful apps that do one thing well.
I started YohApps because I wanted to create tools I'd actually use myself. Every project here exists because I needed it, and I figured others might too.
I ship real products, think in systems, and work across iOS, Android, and Web. Some projects are shipped, some are in progress, some are explorations—all are intentional.
Philosophy
- Solve real problems. If I can't explain why an app matters in one sentence, it probably doesn't.
- Ship small, iterate often. Perfect is the enemy of done. Get it out, learn, improve.
- Respect the user. No dark patterns, no data hoarding, no manipulation. Just useful software.
- Stay independent. Revenue comes from happy users, not from advertisers or investors.