Wellness · checked 2026-10-19Can I vibecode MyFitnessPal Premium?
KINDA· weekend project
The diary itself is easy: foods with calories and macros, meals, daily totals against goals, a weight chart. An agent builds that in one sitting. The weekend goes on what fills the diary. Open Food Facts and USDA FoodData Central give free barcode and generic food lookups, but brand and restaurant coverage is patchier than MyFitnessPal's, and some entries are wrong. Scanning from a phone camera needs HTTPS and a web app, and watch and scale sync (Apple Health, Garmin, Fitbit) is another project. If you log mostly home cooking, a build can replace it; if you eat out, you will miss the database.
$19.99/moprice
$240you'd save a year
weekendbuild time
—people replaced it
What you need on hand.
DifficultyIntermediate · Some system setup or keys.
TimeA weekend; HTTPS for the phone camera is the fiddly part
- Claude Code, Codex or CursorAny of them can run the prompt.
- Node.js 22better-sqlite3 compiles a native module, so build tools must be installed.
- A free USDA FoodData Central API keyRequest one on the USDA site; Open Food Facts needs no key.
- HTTPS from your phoneTailscale on your home machine or a Caddy reverse proxy on a small VPS; phone browsers only open the camera on HTTPS.
- Your MyFitnessPal exportOptional; export it while Premium is still active.
Before you buildMyFitnessPal's free tier still tracks nutrition, weight and exercise, and OpenNutriTracker is a free app on both phone platforms. Build only if you want your own data store.
- 1. Install one agent: Claude Code, Codex, Cursor.
- 2. Make an empty folder and open it in the agent.
- 3. Paste the prompt below, press enter, and answer its questions as it builds.
The prompt
Build me a personal calorie and macro diary to replace MyFitnessPal Premium. Requirements: - Node.js 22 + TypeScript: Fastify serving a mobile-first installable web app (web manifest plus service worker). `npm start` serves http://localhost:4860. A phone camera needs HTTPS, so the README covers a Tailscale or Caddy setup. - Storage: better-sqlite3 in ./data/diary.db with foods (per 100 g plus named servings), custom foods and recipes, diary entries (date, meal, food, grams), weight entries, exercise entries and daily goals. - Food search order: your own foods, then Open Food Facts (https://world.openfoodfacts.org/api/v2, send a descriptive User-Agent), then USDA FoodData Central (USDA_API_KEY in .env). Cache every result locally so repeat lookups work offline. - Barcode scan: `@zxing/browser` reads the barcode through the phone camera and looks it up in Open Food Facts; if the product is missing, open an add-custom-food form pre-filled with the code. - Diary: a day view with breakfast, lunch, dinner and snacks; calories, protein, carbs and fat against goals; a different goal per weekday; a net-carbs toggle (carbs minus fibre and sugar alcohols); copy yesterday or a past meal; quick-add calories and macros with no food. - Trends: weight with a 7-day moving average, and weekly calorie and macro averages. - Import and export: import a MyFitnessPal "Your Nutrition" CSV by mapping whatever columns it has; export the whole diary as CSV and JSON. - Single user with one password in .env (signed cookie). No accounts, no telemetry, local-first; outbound calls are food lookups only. - Out of scope: voice logging, meal photos, social features, wearable sync, meal plans. - README: Open Food Facts coverage differs by country and some entries are wrong, so keep the custom-food form handy.
Opens your agent with the prompt filled in, you press enter. Or copy it and paste it into an empty folder.
Then keep going
Next prompts, same folder.
The first prompt builds the core. Run these one at a time in the same folder to grow it into your own MyFitnessPal Premium.
Extend the calorie diary in this folder. Requirements: - A recipe editor: ingredients with grams, number of servings, and cooked weight; per-serving and per-100 g nutrition computed from the ingredients. - Logging a recipe adds one entry by servings or by grams of the finished dish. - Editing a recipe must not change past diary entries; store a snapshot of the nutrition on each entry. - Tests for the arithmetic, including a dish that loses weight when cooked. - Update the README.
Add weight import to the calorie diary in this folder. Requirements: - Accept an Apple Health export.zip (parse only body mass records with a streaming XML parser) and a Garmin weight CSV, and merge them into the weight table by date and source. - Show a preview with the number of new, duplicate and conflicting rows before saving. - Never overwrite a weight I typed by hand. - Update the README with how to export from each app.
Add a weekly report to the calorie diary in this folder. Requirements: - `npm run report` sends an HTML email through SMTP settings in .env with average calories and macros against goals, days logged, weight change and the five most-logged foods. - Mark days with fewer than two logged meals as incomplete and leave them out of the averages. - Include a cron example for Sunday evening. - Update the README.
What you lose
- MyFitnessPal's crowd-built food database, restaurant and brand items included
- Sync with Apple Watch, Fitbit, Garmin, Samsung Health, Google Fit and more than 35 other apps and devices
- Voice logging and meal scan
- A native phone app with a fast barcode scanner
- Premium+ meal plans, recipes and grocery delivery
Why people still pay
People pay to log a meal in seconds: scan the barcode, pick a restaurant item someone else already entered, and have steps and workouts arrive from a watch. Years of diary history and the daily habit are the lock-in, and the free tier keeps nudging them toward the paid features.
MyFitnessPal Premium or your own copy?
Over
Your usage
12h ×$/h
MyFitnessPal Premium, 1 yr$240
Your own copy, 1 yr$38running + build session
You keep$202pays for itself in the first month
Estimate · Free on a home machine with Tailscale, or a $5 VPS; USDA and Open Food Facts are free. The build is token usage on your agent plan.
Take your data, then cancel.
1 · Take your data out of MyFitnessPal Premium
- 1Data export is for Premium and Premium+ members, so run it before your subscription ends.
- 2In the app, open More, then Nutrition, then Export, pick a date range and tap Export My Information. On the website the same option is under Reports, then Export.
- 3MyFitnessPal emails a zip of three CSV files for your progress, exercise and nutrition history.
- 4The zip is the main export: community threads report no way to get a per-food CSV, so keep a copy of anything you rely on, such as custom foods and recipes.
2 · Cancel MyFitnessPal Premium
- 1Cancel where you subscribed: in MyFitnessPal's Settings on the web, in your App Store subscriptions on iPhone, or in Google Play on Android.
- 2Cancel before the renewal date. You are cancelling the next charge, and Premium stays active until the end of the period you already paid for.
- 3A free trial converts to a paid plan at the end of the 7 days unless you cancel first.
- 4Monthly plans bill every month and annual plans every year; the page we read promises access until the period ends, not a refund for the rest of it.
- Your free account keeps tracking nutrition, weight and exercise after Premium ends; only the Premium features go away.
- Export first, cancel second: data export is a Premium feature.
- Check the renewal date in your store subscriptions, since an annual renewal is a single large charge.
- To move into a self-built diary, import the Your Nutrition CSV and re-enter custom foods by hand.
Checked 2026-10-19 against MyFitnessPal Premium's docs: 1, 2, 3
The escape hatch
Don't feel like building it? These are already free.
OpenNutriTrackerOpen sourceGPL-3.0 calorie, macro and micronutrient logger with barcode scan, backed by Open Food Facts and USDA; no account, data stays on the phone.★ 2.7k · active Oct 2026 · they host it
Android, iOSVisit ↗WaistlineOpen sourceGPL-3.0 calorie counter and weight tracker for Android; looks foods up in Open Food Facts and USDA and keeps everything local.★ 752 · active Oct 2026 · they host it
AndroidVisit ↗wgerOpen sourceAGPL self-hosted workout, nutrition and weight tracker; run it with docker compose or use the hosted instance.★ 7.2k · active Oct 2026 · docker to self-host
Web, Android, iOSVisit ↗
Android, iOSVisit ↗WaistlineOpen sourceGPL-3.0 calorie counter and weight tracker for Android; looks foods up in Open Food Facts and USDA and keeps everything local.★ 752 · active Oct 2026 · they host it
AndroidVisit ↗wgerOpen sourceAGPL self-hosted workout, nutrition and weight tracker; run it with docker compose or use the hosted instance.★ 7.2k · active Oct 2026 · docker to self-host
Web, Android, iOSVisit ↗
The numbers
MyFitnessPal Premium pricing
| Plan | Monthly | Annual, per month | What you get |
|---|---|---|---|
| Free | $0 | $0 | Nutrition and weight tracking, exercise tracking. Ads in the app. |
| Premium | $19.99 | $6.67 | Barcode and meal scan, voice log, macro tracking in grams or percent with custom goals, net carbs mode, quick-log of macros, multi-day logging, intermittent fasting, food insights and comparison, ad-free, data export. |
| Premium+ | custom | — | Everything in Premium plus personalized meal plans, grocery delivery integration and 1,500+ recipes, per the App Store description. |
- Free tier
- No barcode or meal scan, voice log, custom macro goals, fasting timer, food insights or data export on Free, and the app shows ads.
- Billing
- Monthly or annual, auto-renewing, charged through MyFitnessPal's website, Apple or Google. A 7-day free trial exists for people who never had Premium; the first charge comes at the end of the trial unless you cancel. Cancelling stops the next charge and Premium stays until the paid period ends.
- Hidden costs
- The price depends on your country and store, so the page you see may differ from the USD figures here. Meal plans and grocery delivery sit in the higher Premium+ tier.
- Source
- www.myfitnesspal.com
Also on the list
Related apps
Free covers nutrition and weight tracking and exercise tracking, with ads.
Kinda. The core is a weekend build with the prompt on this page, but real gaps remain: MyFitnessPal's crowd-built food database, restaurant and brand items included, Sync with Apple Watch, Fitbit, Garmin, Samsung Health, Google Fit and more than 35 other apps and devices.
About $19.99 a month on the Premium plan, $239.88 a year (checked 2026-10-19).
MyFitnessPal's crowd-built food database, restaurant and brand items included; Sync with Apple Watch, Fitbit, Garmin, Samsung Health, Google Fit and more than 35 other apps and devices; Voice logging and meal scan; A native phone app with a fast barcode scanner; Premium+ meal plans, recipes and grocery delivery. If any of those matter to you, keep paying.
Yes: OpenNutriTracker (open source), Waistline (open source), wger (open source).