Comparison

DayByDay Tracker vs AllergAI

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DayByDay Tracker

Features
Read full description

The weight loss journey is lonely. The scale lies. And nobody hands you a map for life on a GLP-1. DayByDay is the companion that finally gets it. One calm, private place for everything that actually moves the needle — your food, your weight, your medication, your sleep, your body. Connect Apple Health and much of it fills in. And every morning, Dayo, your AI coach powered by Anthropic's Claude, reads your last 30 days and tells you, in plain words, what's working and what's not. Losing, holding your goal, or coming back from a regain — there's no shame here. Just your data, and a path forward. MEET DAYO, YOUR AI COACH • Daily Coach Notes written from your real numbers, not generic tips • Every claim backed by evidence you can tap • Knows your medication, your dose, and where you are in the journey • Names the stalls and plateaus, and shows you what's actually changing FOOD LOGGING THAT DOESN'T FEEL LIKE A CHORE • Snap a photo of your plate and let AI turn it into calories and macros • Scan a barcode or search millions of foods, powered by FatSecret — even offline • Save favorites and copy yesterday, so most days take just a few taps • Calories, protein, carbs, fiber, and water at a glance • Let Dayo connect what you eat to how you feel — insight, never judgment BUILT FOR GLP-1 • A live medication level, and a countdown to your next shot • Missed-dose guidance that follows your medication's FDA label • Pen storage countdown so a $1,000 pen never gets tossed by mistake • Injection-site rotation advisor • Side-effect tracking with peak-day patterns for your provider • Pharmacy and refill hub with prior-auth reminders • Ozempic, Wegovy, Mounjaro, Zepbound, Saxenda, Rybelsus, and compounded • Travel-aware dose timing, pause mode, and a medication switcher • A doctor-ready visit summary PDF YOUR BODY, DEEPER • A weight trend that cuts through daily water-weight noise • Body-fat percentage goal with projections • DEXA scan tracking with lean-mass-loss alerts • Waist, chest, and neck measurements, plus clothing sizes • A private, encrypted progress-photo timeline SLEEP, ENERGY, AND RECOVERY • A personal Energy Schedule that predicts your highs and dips each day • Sleep stages, a Sleep Score, and a Resilience Score • Overnight blood oxygen, heart rate, and breathing rate • Wellue / Viatom O2 Ring sync STAY IN IT • A Momentum Score that rewards showing up • Milestone celebrations at 5%, 10%, or your goal • Share cards for your wins, straight to Instagram or Stories • Home Screen and Lock Screen widgets: weight, medication level, next-shot countdown PRIVATE, ALWAYS • Encrypted at rest, private by default • One tap to delete everything • No ads, ever, and your data is never sold • Fully exportable, anytime START WITH 14 DAYS FREE • Try Plus free for 14 days — food logging and all — then keep going free or subscribe. Cancel anytime. • Free: log your weight, doses, sleep, exercise, and labs — no time limit, no credit card • Core ($4.99/mo or $49.99/yr): Dayo your AI coach, trends, projections, Apple Health sync, and exports • Plus ($9.99/mo or $99.99/yr): everything in Core, plus food logging (barcode, photo-of-plate, FatSecret) and food-aware AI coaching Coming from MyFitnessPal or Lose It!? You'll feel right at home — plus everything a food tracker can't see: your medication, your sleep, your body, all in one place. Privacy Policy: https://mydaybyday.app/privacy Terms and Conditions: https://mydaybyday.app/terms Support: https://mydaybyday.app/support — IMPORTANT: DayByDay is a personal health tracking tool designed to help you record and visualize your health journey. It does not provide medical advice, diagnosis, or treatment. DayByDay is not a medical device and has not been evaluated or approved by the FDA or any regulatory authority. All calculations, estimates, and visualizations are for informational purposes only. Always consult your healthcare provider before making any decisions about medication or treatment.

About

AllergAI

Features
Read full description

AllergAI helps you find the foods behind your symptoms. Scan a meal and AllergAI identifies the food and flags possible allergens in seconds. Log how you feel, and over time it triangulates the patterns connecting what you eat to how you feel, so you can have a more informed conversation with your doctor. WHAT YOU CAN DO - Scan food with your camera and get instant allergen flags - Look up packaged foods and dishes, even by brand name - Log symptoms, with optional AI photo reads - See trends and a personalized view of your likely triggers - Export a clean, physician-ready PDF for your appointments - Learn from a built-in education library on common allergens BUILT AROUND YOUR GOALS Tell AllergAI what you are working toward, finding hidden triggers, managing a known allergy, or eating out with more confidence, and it tailors your experience from day one. PRIVATE BY DESIGN Your food and symptom logs are stored on your device. IMPORTANT AllergAI is an informational tool, not a medical device. It does not diagnose, treat, or prevent any condition, and it can miss hidden or trace ingredients. Always check packaging and ask staff, and never rely on AllergAI for an allergy that could be severe. For any serious reaction, use epinephrine if prescribed and call emergency services. Always consult your physician about allergies and before making medical decisions. SUBSCRIPTION AllergAI offers a 3-day free trial, then an auto-renewing subscription (weekly, monthly, or yearly). Payment is charged to your Apple ID. Cancel anytime in Settings at least 24 hours before renewal. Terms: allergai.com/terms Privacy: allergai.com/privacy Terms of Use (EULA): https://allergai.com/terms Privacy Policy: https://allergai.com/privacy Standard Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

DayByDay Tracker4 screens
AllergAI4 screens

Verdict

The call

The clearest difference is in-app purchases: AllergAI at none against DayByDay Tracker's 6. On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. DayByDay Tracker sells 6 in-app purchases, starting at $4.99 per month. AllergAI asks for nothing beyond the download.

Scorecard1 real difference · 5 level
DayByDay Tracker versus AllergAI: the parameters behind the verdict, then further details
ParameterDayByDay TrackerAllergAI
PriceFreeFree
Update frequencyMonthly—
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size88 MB9 MB
Age rating12+12+
DeveloperChristopher KaczkowskiADD Enterprises LLC

In-app purchases

6 purchases

DayByDay Tracker

Subscriptions6
  • Day By Day Core Monthly$4.991 Month
  • DayByDay Premium Monthly$5.991 Month
  • Day By Day Plus$9.991 Month
Show 3 more
  • Day By Day Core Yearly$49.991 Year
  • DayByDay Premium Yearly$59.991 Year
  • Day By Day Plus Annual$99.991 Year
None

AllergAI

No in-app purchases

Questions

Is DayByDay Tracker free?
DayByDay Tracker is free to download, with in-app purchases available.
Is AllergAI free?
AllergAI is free to download, with no in-app purchases.
Do DayByDay Tracker or AllergAI have ads?
Neither DayByDay Tracker nor AllergAI shows ads.

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