DayByDay is the GLP‑1 patient-first companion for weight, body composition, and metabolic health. Track what matters. Get insights that help. And build a healthier you — day by day.
Built for your whole journey
DayByDay smooths the noise out of daily weigh-ins, projects your goal date with confidence bands, and tracks the body-composition numbers your scale can't.
Raw weigh-ins, smoothed trend, and weekly highs/lows in one view. Plus BMR, lean mass, metabolic age, RFM, and FFMI.
Based on your actual trend — not generic formulas. See body-fat % at goal weight, weight at goal body-fat %, and the milestones along the way.
Body fat %, lean mass, bone density, visceral fat, and RMR — plus lean-mass loss warnings when a GLP‑1 takes more than it should.
Track your medication, doses, side effects, and results in one place. Get guidance for every step of the way.
49% of full effectiveness · Week 37
Track sleep stages, recovery, HRV, and more to understand your body and wake up ready for better days.
Dayo analyzes your real data to deliver daily insights that are personal, actionable, and always backed by evidence.
You're right where you need to be this morning.
Your scale ticked up a pound, but your body's doing the work underneath. You shed fat while building lean mass — the quieter win that reshapes how you feel.
Fat down 0.4 lbs · lean mass up 1.5 lbs · body fat % down 0.3 over 30 days.
You logged 3 doses instead of the 4 on your weekly Ozempic schedule. Want to double-check if one didn't make it into the log?
3 doses in the 30-day window; expected 4. Adherence 75%.
Steady 7.5 hours a night — solid ground. Mood is bouncing between hopeful and stressed; worth noticing if stress is creeping in.
Avg sleep 7.6 hours · mood labels: Hopeful, Tired, Motivated, Calm, Stressed.
Not medical advice — talk to your clinician about treatment decisions.
Smoothed trends, projected goal dates with confidence bands, body-fat % projections, milestone celebrations, and a coach that respects your titration step.
A Maintenance Range card replaces Goal Progress. Track drift from goal, in-range streaks, 30-day variability, and maintenance milestones at 30, 90, 180, 365, and 730 days.
If weight drifts back above your maintenance band, the app gently flags it and surfaces comeback-oriented guidance. No shame. Just the data and a path forward.
Five native widgets across the Home Screen and Lock Screen — no app open required.
Every database table is scoped to your account. No human reviews your data without your permission.
Your data is encrypted on disk. Progress photos live in a private, encrypted bucket — local-first by default.
Your data is never sold or used for advertising. No social feed. No leaderboards.
Delete everything anytime. Full control over your data, always.
All logging is free forever. Premium unlocks the analysis layer — Dayo AI Coach, projections, correlations, the Pharmacy Hub, and the doctor-ready PDF.
All logging, all your data — no time limit, no credit card.
Billed monthly · about 20¢ a day
$59.99 billed yearly · about 16¢ a day · save 17%
14 days free, cancel anytime in one tap.
One small entry. One better decision. One more step forward.
