Last updated 07-27-2026
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Calorie Tracker
Calorie Tracker turns a meal photo into a calorie estimate using GPT-Vision. You upload an image of food through the web app, and it returns an estimated caloric count without manual database lookups. The tool runs on calorietracker.calstudio.com, part of the CalStudio platform formerly known as pmfm.ai. Account signup is required before you can submit images.
Most calorie apps maintain proprietary food databases and charge recurring subscriptions. Calorie Tracker instead analyzes whatever you photograph with vision models, and it asks you to supply your own ChatGPT API key for continued use. That bring-your-own-key setup keeps platform costs low but adds setup steps rivals like MyFitnessPal skip. You trade structured macro breakdowns for flexibility on homemade or uncommon dishes.
The workflow suits people who want quick ballpark calorie checks from photos rather than detailed nutrition logging. Dieters, casual meal trackers, and developers testing vision-based food tools can sign in with GitHub, Google, LinkedIn, or email. Support runs through a Discord channel linked from the app interface.
Credit purchases are available inside the app at $10 through the Buy Credits button. Your OpenAI API key is stored server-side and is not exposed in the browser, per the in-app prompt. There is no dedicated mobile app store listing; everything happens in the web browser.
Upload a food image and GPT-Vision returns an estimated calorie count
Sign in with GitHub, Google, LinkedIn, or email before using the app
Requires your own ChatGPT API key stored server-side, not exposed in the browser
In-app credit purchases at $10 through the Buy Credits flow
Hosted on calorietracker.calstudio.com as a CalStudio-built web app
Estimates calories from any food photo without searching a food database.
Sign in with GitHub, Google, LinkedIn, or email.
Your ChatGPT API key stays server-side and is not exposed in the browser.
Web-based with no app store download required.
Requires supplying your own ChatGPT API key to keep using the tool.
No dedicated iOS or Android app listed on the site.
In-app credit purchases at $10 are the only documented paid option on the app page.
What does Calorie Tracker do?
Calorie Tracker estimates calories from food photos using GPT-Vision. You upload a meal image through the web app at calorietracker.calstudio.com and receive an estimated caloric count in return.
Is Calorie Tracker free?
Calorie Tracker is freemium. You can sign up for free with GitHub, Google, LinkedIn, or email, but continued usage requires your own ChatGPT API key and optional $10 credit purchases inside the app.
Do I need a ChatGPT API key for Calorie Tracker?
Yes. Calorie Tracker prompts you to enter a ChatGPT API key for continued usage. The app states the key is protected server-side and not exposed in the browser.
How do I sign up for Calorie Tracker?
Calorie Tracker supports GitHub, Google, LinkedIn, or email sign-up from the app page. You must create an account before submitting food images for calorie estimates.
Does Calorie Tracker have a mobile app?
Calorie Tracker is web-based only. There is no iOS or Android app store listing on the site; you access it through a browser at calorietracker.calstudio.com.
How much do Calorie Tracker credits cost?
Calorie Tracker sells in-app credits for $10 through the Buy Credits button on the app page. The purchase flow appears after you log in to your account.