DayByDay is built so the most important part — logging your journey — is free, forever. There's no clock on it and no catch. When you're ready for the parts that interpret your data and make it shine, that's where Core and Plus come in. Here's exactly what you get with each, in plain language.
The three plans
| Free | Core | Plus | |
|---|---|---|---|
| Price | $0, forever | $4.99/mo · $49.99/yr | $9.99/mo · $99.99/yr |
| Log everything (weight, GLP-1 doses, sleep, exercise, labs, measurements, mood) | ✓ | ✓ | ✓ |
| Trend charts, projections & weekly stats | — | ✓ | ✓ |
| Dayo AI coach (daily read + weekly Story) | — | ✓ | ✓ |
| Journey Mode (sunset interface) | — | ✓ | ✓ |
| Apple Health sync | — | ✓ | ✓ |
| Health scores (Sleep, Momentum, etc.) | — | ✓ | ✓ |
| PDF & CSV exports for your doctor | — | ✓ | ✓ |
| Nutrition module (FatSecret search, barcode, photo-of-plate, label scan) | — | — | ✓ |
| Nutrition-aware Dayo (protein↔muscle, fiber↔side effects, energy balance) | — | — | ✓ |
Plus is simply Core, plus food
Plus includes everything in Core and adds the full Nutrition module and the nutrition-aware version of Dayo. You're never losing a feature by choosing one over the other — Plus is Core with more.
Your 14-day free trial
Every new account starts with a 14-day free trial that unlocks the full Plus experience — the Nutrition module, trend charts, Dayo's coaching, Journey Mode, Apple Health sync, and exports. No credit card to start. If you decide it's not for you, just let the trial run out; you won't be charged, everything you logged stays put, and your account simply moves to the Free plan.
Make the trial count
Log a weigh-in every morning, connect Apple Health, and log your most recent GLP-1 dose in the first day or two. The more you feed in early, the sooner your trend line and Dayo's reads have something real to say.
What it costs
| Plan | Monthly | Yearly | Yearly works out to |
|---|---|---|---|
| Core | $4.99 | $49.99 | about $4.17/mo |
| Plus | $9.99 | $99.99 | about $8.33/mo |
Pick monthly if you want flexibility, yearly if you'd rather pay once and save. You can switch or upgrade whenever you like.
Premium — Try Plus free for 14 days
Nutrition logging, trend projections, Dayo's daily coaching, Journey Mode, and Apple Health sync — the whole product, no card required. After 14 days you'll move to the Free plan unless you subscribe.
How to subscribe
You can subscribe right inside the iPhone app (billed through the App Store) or on the web. Either way, you'll see your plan reflected across every device you sign in on.
- 1Open the You tab.
- 2Tap your plan card at the top (it shows DayByDay Core or DayByDay Plus, or your trial status).
- 3Choose Core or Plus, and monthly or yearly.
- 4Confirm — on iPhone with Face ID, Touch ID, or your Apple ID; on web with the on-screen checkout.
Managing or canceling
To change plans or cancel, open You → your plan card → Manage Subscription. If you subscribed through the App Store, that button takes you to Apple's subscription settings, where the cancel and refund controls live.
Honest billing, no dark patterns
We don't bury the cancel button or trick you into renewing. Cancel whenever you want, keep using paid features until the end of the period you already paid for, and you're done.
How do I cancel?✦
Open You → your plan card → Manage Subscription. If you bought through the App Store, that opens Apple's settings — tap DayByDay and then Cancel Subscription. Your paid features stay active until the end of the current billing period.
What happens to my data if I downgrade?✦
Nothing is lost. You keep every weigh-in, dose, sleep night, meal, and note you ever logged. Downgrading just locks the analysis layer — trend projections, Dayo's coaching, and (on a downgrade from Plus) the Nutrition module. Re-subscribe later and it all lights back up exactly where it was.
Do I lose my data after the free trial?✦
No. When a trial ends you simply move to the Free plan, where logging stays free forever. Your full history is safe and waiting — only the Core and Plus features (including Nutrition) pause until you subscribe.
Where can I see receipts or get a refund?✦
For App Store subscriptions, receipts come from Apple by email and refunds are requested at reportaproblem.apple.com. For anything else, email support@mydaybyday.app and we'll help.