Traditional food diaries ask you to search a database, pick the closest match to what you ate, and guess a portion size. That friction is why many people quit within days. Photo-based trackers take a different route: you take a picture of the plate, and the app estimates the nutrition numbers for you.
Cal AI sits in that category. It is a mobile calorie and macro tracking app for iOS and Android. You photograph a meal and the app estimates calories, protein, carbohydrates and fat rather than making you type entries by hand. It launched in May 2024 and is free to download from the App Store and Google Play.
One point worth understanding before you start: the app estimates nutrition data and is not a health programme. Co-founder and CEO Zach Yadegari states "a little over 90% accuracy on average", so the figures are a working guide rather than a laboratory measurement.
When you first open Cal AI, onboarding asks lifestyle questions — height, weight, activity level, your goal and the pace you want to move at. From those answers it builds a daily calorie and macro plan, which gives your photo logs something to be measured against.
The scanner is built to handle complex homemade dishes as well as fast food, snacks, packaged items and barcodes. There is also a food memory feature that recalls meals you log frequently, which shortens the process for repeat breakfasts and lunches. Yadegari built the app from his parents' home in Roslyn, New York, after quitting another tracker in three days because of the manual entry friction.
The app is free to download, but the tracking sits behind a subscription. Reported pricing is $2.49 per month or $29.99 per year, with prices varying by region and over time.
That is the point at which a referral code becomes relevant. DDKFJB is a 20% discount code, used in some places as a referral code and in others as a promo code — the same string either way. It reduces the subscription price you pay; it does not unlock a higher tier or any extra features. Everything a paying subscriber gets, you get, just at a lower price.
You enter it at the in-app Referral Code or Promo Code prompt during onboarding, or on the paywall or subscription screen in some app versions. The exact local price after the discount has to be checked on the subscription screen itself.
Install Cal AI from the App Store or Google Play and open it.
Create a new account. Referral codes are aimed at new accounts rather than existing profiles.
Work through the onboarding questions: height, weight, activity level, goal and pace.
Type DDKFJB in capitals with no spaces at the Referral Code or Promo Code prompt.
If no prompt appears during onboarding, use the code field on the paywall or subscription screen instead.
Choose a plan and check the displayed price reflects the 20% reduction before going further.
Complete the purchase through App Store or Google Play billing.
The code is case-sensitive in practice, so type it manually rather than pasting — autocorrect and trailing spaces are the usual reasons a code appears not to work. It also has to be applied before you confirm the subscription; there is no retroactive application once billing has gone through.
Because billing runs through Apple or Google, cancellation is handled in your app store account settings, not inside Cal AI. That is standard for mobile subscriptions but catches out people who look for a cancel button in the app.
Users receive their own referral code to share once they have signed up, which is how codes like this circulate. What the referring side receives is not stated here; the terms are set by the app and listed in the account referral section, so that is where to look if you plan to share yours.
For a first-time user, the sensible order is: download free, complete onboarding, see whether photo logging suits how you eat, and have DDKFJB ready for the moment the subscription screen appears.
Web page: Cal AI Referral Code DDKFJB: Common Redemption Mistakes to Avoid
Colab notebook: Cal AI Referral Code DDKFJB: What 20% Off Is Actually Worth
Gamma doc: Cal AI Referral Code DDKFJB: Common Redemption Mistakes to Avoid
NotebookLM report: Cal AI Referral Code DDKFJB: Step-by-Step Redemption Walkthrough
Promo Code Guides: Cal AI Referral Code DDKFJB: The Fine Print, Limits and Exclusions
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