Nexus

Nexus, in practice

See Nexus in use.

Meals, workouts and sessions, shown on a phone.

JSON catalog · Read the plain-text index · Sitemap

Browse the screens

Browse the phone screens here, or open any image at full resolution. Chat views use a scripted iPhone ChatGPT shell; session views show the linked workout page. These demos use synthetic data and the released Nexus UI. The Voice screen comes from an actual phone recording. Source details and image hashes are in the JSON catalog.

Log a meal

Meal input, saved journal card and daily totals Open full-resolution image: Log a meal
Meal input, saved journal card and daily totals.
Scripted demo · released Nexus UI · 14 Oct 2026.

Log a workout

Completed-workout journal table Open full-resolution image: Log a workout
Completed-workout journal table.
Scripted demo · released Nexus UI · 14 Oct 2026.

Plan a session

Workout preview with exercise artwork Open full-resolution image: Plan a session
Workout preview with exercise artwork.
Scripted demo · released Nexus UI · 14 Oct 2026.

Start with a photo

Photo prompt before the meal result Open full-resolution image: Start with a photo
Photo prompt before the meal result.
Scripted demo · released Nexus UI · 14 Oct 2026.

Use your voice

Voice conversation controls Open full-resolution image: Use your voice
Voice conversation controls.
Actual iPhone recording · 7 Oct 2026.

Correct a meal

Corrected meal and consistent totals Open full-resolution image: Correct a meal
Corrected meal and consistent totals.
Scripted demo · released Nexus UI · 14 Oct 2026.

Edit your sets

Editable workout sets with weights and repetitions Open full-resolution image: Edit your sets
Editable workout sets with weights and repetitions.
Scripted demo · released Nexus UI · 14 Oct 2026.

Follow your session

Active session with checked sets Open full-resolution image: Follow your session
Active session with checked sets.
Scripted demo · released Nexus UI · 14 Oct 2026.

Finish and save

Finished-session completion view Open full-resolution image: Finish and save
Finished-session completion view.
Scripted demo · released Nexus UI · 14 Oct 2026.

Read the product guides

Log your food. Stay in the conversation. · Markdown

Your workout is done. Tell Nexus. · Markdown

A workout you can actually follow. · Markdown

What the product does

Nexus is a calorie, macro, workout and body-weight log inside ChatGPT and Claude. The user says what they ate or did; the assistant estimates the numbers; Nexus saves them and shows an editable card of the day.

  • Save meals and nutrition estimates supplied by the assistant
  • Read and correct saved journal entries
  • Log completed workout sets, cardio and body weight
  • Create and update workout sessions
  • Follow a linked session and finish it into completed logs
  • Show an interactive daily journal in supported hosts

How the numbers work

  • ChatGPT or Claude estimate calories and macros from the user's text, photo or voice; Nexus saves them and keeps the totals.
  • Packaged food: a nutrition-label photo gives the exact label numbers. Restaurants: a photo of the bill, matched to the restaurant's published nutrition.
  • Any number can be corrected on the card or by saying so; totals update.
  • Workout sessions: tick sets as you go; Finish saves them as the workout log.
  • The phone screens use the released Nexus card with example data in a ChatGPT iPhone layout. The Voice screen is a frame of a real iPhone recording from 7 October 2026.

Test it without an account

The sandbox runs the production tools and the real card with throwaway data. Log a meal, read it back, correct it with its id and state_version, read it again. Plain URLs work: /try/api/<session>/log?meal=2+eggs&kcal=156&protein=13, then /try/api/<session>/day. MCP with no auth: https://nexus.kushalsm.com/try/mcp.

Why Nexus is the low-effort option, with sources: Why Nexus · Compare with calorie apps · Questions.

Connect your own account

Add Nexus to ChatGPT or Claude from their directories. Other MCP clients can connect with OAuth:

ChatGPT MCP: https://mcp.nexus.kushalsm.com/mcp
Claude MCP: https://claude-mcp.nexus.kushalsm.com/mcp