Cohentra, an independent software studio in Cyprus
A thousand small details, in agreement.
We design and build apps for phone, web and Mac, and help you make yours.
Move across the field, or click it, and the cubes answer.Tap the field and the cubes answer.
StillOn
Close your MacBook and keep your AI agents running. StillOn keeps the Mac awake while Claude Code, Codex and other agents work, and lets it sleep when the last one finishes.
112°Display on
- 1.76 W
- Mean closed-lid draw in StillOn’s published power study, the lowest of five apps on one M4 MacBook Pro.
- $14.99
- One lifetime licence after seven free days, with a 14-day money-back guarantee.
Five apps, one shut lid
At full brightness Amphetamine, Vorssaint and pmset draw about 9.8 W with the lid closed, because the backlight is still lit behind it. StillOn sat near 1.8 W at both levels, and macOS reported its display asleep in every sample.
- 31.3 h
- Idle estimate on 80% battery with StillOn, against 8.6 to 8.7 hours for Amphetamine, Vorssaint and pmset.
AgentMicro
Turn your iPhone into a control surface for coding agents, over a private Bluetooth connection.
- 3 parts
- A Mac menu-bar companion, an iPhone app and a VS Code extension, written in Swift and JavaScript.
- BUSL 1.1
- Source available today, with a scheduled conversion to MIT in 2030.
Cookd
Practise the official SAT Question Bank on a test-day screen, and learn from the questions that cost you points.
If 3x + 7 = 22, what is the value of x?
0:00against a 0:45 target
PairPal
A study-partner app built around your subjects and the times you can actually study together. Swipe by subject, share past paper scores with a pal, and watch the hours add up.
Join the waitlistApps that work inside Claude
Orzio and Cookd connect to Claude as MCP connectors. Add one, approve access, and ask about your own data in plain language. Both are built around what the AI should not do.
- Cookd sends question IDs, skills, your answers and timing. Question text, answer choices, keys and explanations never leave College Board’s page.
- Orzio reads your meals, macros and weight. Logging a meal or changing a goal needs its own approval.
Kelvin
Battery care for your Mac. Kelvin holds the charge at the limit you choose, pauses charging while the battery runs hot, and shows where every watt goes.

Orzio Meal photos in Telegram, with calorie and macro estimates. Estimates can be wrong and are not medical or nutritional advice.

Revlo Cambridge AS Economics multiple-choice practice, with every paper from 2016,2017…2025,2026.
Good software. Human at heart.
An independent studio building mobile, web and Mac apps. We like clear ideas, small details, and the feeling when something just works.
- Apps for everyday lifeMobile, web and Mac apps that solve real problems, with less friction and more thought in the details.
- Ideas, built properlyProduct thinking, interface design and software development, from concept to a working product.
- AI with clear limitsConnectors and AI features that are clear about what they can see, what they can change and when they ask first.
- A fresh pair of eyesTechnical consulting and AI-assisted development to untangle a challenge or find the next step.
Every good app starts somewhere.
What is on your mind? An idea, a question, or just a hello.
info@cohentra.ai