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Build with evidence
Give it a real task. It maps the work, changes files in small checkpoints, runs the relevant checks and brings back the result with the evidence behind it.
UnderStack Code · Mac
A capable assistant for your Mac, with you in control.
UnderStack Code helps you move from a vague task to a checked result. Build software, understand a screen, research a question, organize study material and get everyday work unstuck. It works for developers, students and anyone who wants a practical tool for difficult work.
Launch price: DKK 373 · limited time
Version 1.0.7 · macOS 14 Sonoma or newer · Apple Silicon · Requires Ollama for local models
One agent, more than one kind of work
From codebase to coursework, it stays practical.
For developers, it can plan a change, work in an isolated branch, validate it and review the diff. For students and everyday work, it can read images and notes, search the web when you ask it to, keep useful context and help turn a half-formed question into a next action.
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Stay in control
Edits, terminal commands, browser actions and deployments wait for your approval. You can inspect, stop or roll back every meaningful step.
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Useful outside a repository
Ask about a screenshot, turn lecture notes into a study plan, compare sources, draft a difficult email or keep a thread of research. A workspace is optional.
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Private on your Mac
Models, chats, project memory, screenshots and generated images stay on your Mac. Internet tools are visible and can be turned off.
A clear way to work
Plan, approve, verify.
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Give it a goal
A task, a folder, a screenshot or a question is enough to start.
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See what changes
The agent proposes consequential actions before it edits, runs or publishes.
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Check the outcome
It runs project checks and shows what passed, what failed and what remains.
What you get
Made for real work on a Mac.
Interface languages
English, Español, Dansk, Deutsch, Français, Português and Italiano. You can change the interface language from settings or ask the agent to do it.
What is included
Local model support through Ollama, project memory, image understanding, image creation, browser checks, terminal access, validation, worktrees and review tools.
Your files stay yours
The app has no telemetry, no analytics and no account requirement. You decide when internet tools are used and which actions need approval.
One payment
Launch price DKK 373 in the currency selected on this site. Perpetual licence, future updates included, use on up to two Macs you own or control.
Ready when you are
UnderStack Code for Mac
Launch price DKK 373. This introductory price is available for a limited time.