Software that does the hard part itself.
Contract software engineering from one engineer with over a decade in production: mobile apps, web products, code rescue, payments, tests and CI, and AI features. And the products below, built the same way.
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- ActuatorLive Eyes and hands for AI agents on mobile apps.A single Rust binary that lets AI agents see a phone screen and act on it, on Android emulators, iOS simulators and cloud device farms. It finds a target by sight, so it reaches apps other tools can't, even ones drawn entirely on a canvas.Built with Rust, MCP, ADB, XCUITest, Vision-language models actuator.drengr.dev
- AnalyticsIn development Product analytics with no tracking code.It watches screen changes, taps, network calls and crashes, and turns them into named business events. Personal data it recognises is redacted or sealed on the device before upload.Built with Kotlin, Swift, Flutter, Cloudflare Workers, ClickHouse, Postgres analytics.drengr.dev
- GrasplineFree, in testing Engineering graphics, drawn step by step.A student pastes a textbook question on projections and Graspline draws the full construction, step by step, checking every measurement against the facts it read. Teachers can generate practice sets with answer keys.Built with JavaScript, SVG, Python, Fine-tuned model, Computational geometry graspline.drengr.dev
- MarramIn development A private companion through perimenopause and menopause.Built to notice how she uses her phone, never what she writes, against her own baseline, and to offer a calming exercise when that changes. Designed so everything stays on her phone: no account, no server. Wellness, not diagnosis.Built with Flutter, Dart, On-device ML, Signal processing marram.drengr.dev
- DunelightIn development A private companion for the first year after birth.Marram's sister app, about her rather than the baby: a wellness program made for the first year after birth, built so that what she writes stays on her phone. Wellness, not diagnosis.Built with Flutter, Dart, On-device ML dunelight.drengr.dev