Welcome to DayByDay
The calm companion for the hard, beautiful work of getting healthier.
Track your weight, your GLP-1, your sleep and your meals — and watch a clear, encouraging picture of your progress come together. No calorie guilt. No clinical coldness. Just you, moving forward, day by day.
Five tabs, one calm rhythm
Everything lives in five simple places. Here's the whole app in one breath.
Open the app, see how you're doing
Your Momentum Score turns a week of small efforts into one friendly number — and tells you the next easy win, never a lecture.
- ✦A 0–100 score from your sleep, protein, hydration & activity
- ✦Streaks that celebrate showing up, not being perfect
- ✦Quick Add — log food, water, weight, a dose, or activity in one tap
Whatever you need to log, it's two taps away
Weight, GLP-1 doses, water, mood, sleep, blood pressure, glucose, symptoms — tap to log, hold to see your history. No menus to dig through.
- ✦Friendly bottom sheets — type a number, you're done
- ✦Manual entry is always free, on every plan
- ✦Apple Health fills in steps, sleep & workouts automatically
Food logging that has your back on a GLP-1
Protein and fiber sit front and center — the two things that protect your muscle and keep your gut comfortable while the weight comes off.
- ✦Search millions of foods, snap a photo of your plate, or scan a barcode
- ✦Calories, carbs and fat tracked too — without the obsession
- ✦Tap to log a serving; long-press to fine-tune the portion
Meet Dayo, your in-pocket coach
Each day, Dayo reads your real data and writes you a plain-language note — what's working, what to nudge, and why. Every line is grounded in your own numbers.
- ✦A weekly story across body composition, pace & fuel
- ✦Gentle, honest framing through plateaus and hard weeks
- ✦Tap the 🔖 bookmark to flag anything for your next appointment
A trend line that tells the truth
Some weeks the scale lies — water, salt, a big dinner. The smoothed trend cuts through the noise so you can see the real direction you're heading.
- ✦Raw weigh-ins, a smoothed EMA trend, and body-fat % on one chart
- ✦BMI, waist-to-height, RFM & FFMI — explained kindly, no judgment
- ✦Measurements, labs, DEXA and clothing sizes, all in one place
Every dose, site and refill — handled
Log a dose in seconds, let the Rotation Advisor pick your next injection site, and never wonder when your next shot or refill is due.
- ✦Dose, medication, week-on-therapy, site & how it felt
- ✦A live estimate of how much is in your system (an estimate — never dosing advice)
- ✦Refill cadence and prior-authorization reminders so you never lapse
Walk into your next appointment prepared
You only get a few minutes with your doctor, and it's easy to forget the thing you meant to ask. So DayByDay remembers for you. As you read your insights, tap the 🔖 bookmark on anything you'd like to raise — and it lands automatically in a clean, doctor-ready PDF.
- ✦A Health Report PDF — weight trend, GLP-1 doses, flagged notes & symptoms
- ✦Per-table CSV export for your records or your dietitian
- ✦Pharmacy & prior-auth tracking for the insurance conversation
You do the living; the app does the paperwork.
How reports work
Start free. Upgrade only if it helps.
Logging is free forever. The 14-day trial unlocks Core — no card required to start.
Log everything — weight, GLP-1 doses, sleep, exercise, labs, mood. No time limit.
The analysis layer: trend projections, Dayo's coaching, Journey Mode, Apple Health sync & exports.
Everything in Core, plus the full Nutrition module and nutrition-aware coaching.
Your data stays yours
Encrypted, never sold, never used for ads. Export it or delete it permanently anytime. This is your story — you're the only one who owns it.
Today's a good day to start.
Take the first small step. Future-you — lighter, stronger, steadier — is already grateful.