Tool map v1: what to use when

The tool directory on this site will keep changing as products ship and our testing improves. This is the first editorial map: what to use when, sorted by mode and honesty rather than hype. If a tool is listed as driving-mode, it has to survive the test of eyes-on-road and no confirmation screens. If it is riding-mode, it has to be usable in a moving cabin. Both means it works in either context, with the right caveats.

Driving mode: the reliable layer

For the daily commute, you want tools that are boring in the best way: they work when signal is weak, they do not require a screen, and they degrade gracefully when you interrupt them. The baseline is the platform voice stack you already own — CarPlay or Android Auto — plus a capture tool that puts notes where you will actually find them.

• CarPlay / Android Auto voice: the floor. Calls, messages by dictation, reminders, and navigation are dependable. The ceiling is low, but the floor is high.
• Tesla Grok: the thinking partner. Best for rehearsal, briefing, and structured capture. Not yet a reliable executor because too many flows still end in a tap.
• Cerence Mobile Work Agent: the work-account bridge. Calendar summaries, meeting join, and mail previews tied to Microsoft 365. Useful if your car ships it; not something you install yourself.
• Riffn Drive: the capture specialist. Voice-first notes that become labeled next actions. Good if your current voice notes disappear into a black hole.

Riding mode: the mobile office

Riding mode assumes you are not the driver. The best stack is usually the one you already use at a desk, adapted to motion. A laptop, headphones, and a connection you can trust are the core. The rest is environmental: surface, privacy, and motion tolerance.

• Laptop + cabin connectivity: the unglamorous default. Nothing to install, but bandwidth and motion sickness are real constraints. Satellite or direct-to-cell links help on highway legs.
• Waymo / robotaxi as passenger: the clearest present-tense riding mode. You are not the driver, full stop. The cabin may not be designed for work, but the legal and attention constraints are gone.
• Lucy OS1: the continuity bet. Interesting because it tries to hand off between phone, car, and desk. Early, so expect rough edges, but the problem it targets is the right one.

Both: the emerging middle

Some tools sit in the middle because their usefulness depends on how you use them, not what they are. Grok Bot is the clearest example: in the car it is a capture and intent tool, at the desk it is an executor. Lucy aims for the same middle. The rule is simple: a tool is Both only if it is genuinely useful in driving mode without breaking driving-mode rules.

• Grok Bot: Both, but mostly early. Voice capture in the car, multi-step execution elsewhere. Do not trust it to act while you are driving until it proves it can hand off cleanly.
• Lucy OS1: Both, early. Handoff is the bet. Worth watching, not yet worth reorganizing your stack around.

How to pick a stack

For a 30-minute commute in driving mode, start with your phone's voice stack plus one capture destination. Add Grok or Riffn only if you find yourself losing ideas or struggling to structure voice notes. Do not over-stack. The commute is short; the enemy is friction, not missing features.

For a robotaxi leg in riding mode, start with the laptop you already carry and a pair of headphones. Add connectivity only if tethered cell is unreliable on your route. The specialized tools — mounts, lighting, acoustic treatment — come after you know you actually want to work in the cabin regularly.

The full directory lives at /tools. We update verdicts as products change. If something here is wrong, it is because the product changed or we tested it more carefully. Either way, the map should keep moving toward honesty.