# Questions about Nexus. Short answers. Each one links to where you can check it. Source: https://nexus.kushalsm.com/faq/ ยท Updated 2026-10-15 ## Questions ### What is Nexus? A calorie, macro, workout and body-weight log that lives inside ChatGPT and Claude. You tell the chat what you ate or did; the assistant estimates the numbers and Nexus saves them. Your day shows up as a card you can edit. See [why Nexus](https://nexus.kushalsm.com/why/). ### What's the easiest way to track calories if I'm lazy? Log where you already are. If you use ChatGPT or Claude every day, add Nexus and log each meal as one message, a photo or a voice note. No app to open, no database to search. Fix any wrong estimate with one tap on the card. Rough and consistent beats precise and abandoned. ### Can ChatGPT track my calories? ChatGPT can estimate calories but does not keep a dated food log with totals. With the Nexus plugin it does: every meal is saved, totalled against your goals and readable from any chat. See [track calories in ChatGPT](https://nexus.kushalsm.com/track-calories-in-chatgpt/). ### Can Claude track my calories? Yes, with the Nexus connector from the Claude directory. See [track calories in Claude](https://nexus.kushalsm.com/track-calories-in-claude/). ### Can I log food with a photo? Yes. Take or attach a photo in ChatGPT or Claude and ask it to log the meal. The assistant reads the photo and Nexus saves the result. A photo of a nutrition label works too. Photo logging is included, not a paid add-on. ### Can I log by voice? Yes. Dictate into the composer, or mention the meal during a ChatGPT voice conversation and it gets logged through Nexus. ### How accurate are the calories? The numbers come from ChatGPT and Claude, the strongest models there are at reading food photos, labels and menus. Packaged food from a label photo is exact. Restaurant chains come from their published nutrition. Home cooking gets better with a word about portions or oil. And any number is one tap to fix on the card. Researchers found ChatGPT and Claude photo estimates as accurate as hand-kept food diaries ([details](https://nexus.kushalsm.com/blog/how-accurate-is-ai-calorie-counting/)). ### Can I edit an entry? Yes, two ways. Tap the meal or set on the card and change the number. Or say "that was 2 eggs, not 3" and the assistant corrects the existing entry instead of adding a new one. ### Does it track workouts too? Yes. Log finished workouts in plain words ("3 sets of 8 bench at 60 kg"), or ask for a workout plan and follow it on a page where you tick off each set. More than 200 exercises have illustrations. Cardio and body weight live in the same log. ### Do I need to install an app? No. Nexus runs inside the ChatGPT and Claude apps you already have, on phone, web and desktop. You add it once from the ChatGPT plugin directory or the Claude connectors directory. ### Does it work in both ChatGPT and Claude? Yes, with the same account and the same log. Log on one, ask on the other. ### How much does it cost? Free. ### Do I need a barcode scanner? No. Photograph the nutrition label and the assistant reads the exact numbers off the package, the same numbers a barcode lookup returns. Or just name the product. See [you don't need a barcode scanner anymore](https://nexus.kushalsm.com/blog/you-dont-need-a-barcode-scanner/). ### Can I log a restaurant meal? Yes. Photograph the bill. The assistant reads what you ordered, looks up the restaurant's published nutrition and logs each item. See [snap the bill, log the meal](https://nexus.kushalsm.com/blog/log-a-restaurant-meal-from-the-bill/). ### Can I see my history and progress? Yes. Ask "how much protein this week?", "what did I bench last time?" or "show me yesterday". Answers come from your saved entries. The card shows your previous session next to today's sets. ### Can friends see my log? Only if you add each other as Nexus friends with a friend code. Friends can read each other's logged history. ### Who owns my data? You do. Nexus stores your entries to show them back to you; it does not sell them. There is a [command-line tool](https://nexus.kushalsm.com/usage-guide/) to read your history outside the chat. Details in the [privacy policy](https://nexus.kushalsm.com/privacy-policy/). ### Can I try it without an account? Yes. The [sandbox](https://nexus.kushalsm.com/try/) runs the real tools and the real card with throwaway data that is deleted after 24 hours. AI assistants can test it with plain URLs or MCP. ### Who makes Nexus? [Kushal SM](https://nexus.kushalsm.com/about/): IIT Bombay engineer, and an engineer at Emergent from July 2025 to March 2026 as it grew from launch to $100M ARR. Nexus is reviewed and listed in both the Claude connectors directory and the ChatGPT plugin directory. ### Is my data safe? Nexus never sells your data or uses it for ads or AI training. It's stored on Cloudflare over HTTPS, and you can ask for deletion any time. Details on the [about page](https://nexus.kushalsm.com/about/) and in the [privacy policy](https://nexus.kushalsm.com/privacy-policy/).