Cronometer vs revns: micronutrient tracking or a whole-day score
Cronometer is built for nutrition detail: its free plan logs foods, exercise and biometrics, tracks up to 95 nutrients, includes a barcode scanner and a database of over 1 million verified foods. Gold costs $10.99 a month or $59.99 a year in the US and adds Photo Log, Voice Log, Crono Coach (an AI coach) and a ChatGPT plugin that lets ChatGPT or Codex analyse your nutrition data. We found no official Cronometer MCP server; community ones use unofficial access and need your login. revns is built around the whole day: training sessions, sleep, steps, meals and mood in one score, with a week plan, and an MCP server that works with Claude, ChatGPT, Claude Code and Cursor and can write as well as read. For micronutrient depth pick Cronometer. For an assistant that runs the plan, revns fits better.
| Cronometer | revns | |
|---|---|---|
| Nutrient depth | Up to 95 nutrients, lab-verified database, barcode scanner (free plan) | Meals in a few words, with protein, calories and macros if you add them. No micronutrient database |
| AI inside the app | Crono Coach, Gold only | Rules-based brief in the app; your own Claude or ChatGPT does the coaching |
| Assistant access | ChatGPT plugin for analysing trends (Gold); no official MCP server found | MCP server for Claude, ChatGPT, Claude Code and Cursor, with read and write tools |
| Can the assistant log for you | The plugin is described as analysis | Yes: quick_log, log_meal, set_goal, plan_day, each labelled with the assistant's name |
| Training, sleep and mood | Exercise and biometrics logging | Sessions with sets, sleep, steps and mood, scored together every day |
| Price | Free; Gold $10.99/mo or $59.99/yr (US) | Free; Pro $7.99/mo or $49.99/yr (free until at least Dec 14, 2026) |
Where it is the better choice
Cronometer's database is lab-analysed and its micronutrient tracking is far deeper than anything here. If you manage a deficiency, a medical diet or a cut that needs exact numbers, it is the stronger tool, and its free plan is generous.
Sources
- Cronometer Gold: plans and features
- Cronometer forum: MCP server request
- Community Cronometer MCP server (listing)
Accurate as of November 15, 2026. Training and nutrition guidance only, not medical advice. See a clinician for symptoms, injury or a medical condition.
Your first brief is one entry away.
Pick an objective, say how you eat, log one thing.