Lucas: Baby Tracker & Log
Feeding, Sleep, Diaper, Growth
Free · In‑App Purchases
Lucas helps new and experienced parents keep an effortless, accurate log of every feeding, diaper, sleep, pumping session, milestone, growth measurement, and medical appointment — without the noise of social feeds or ads.
WHAT YOU CAN TRACK
• Feedings (breast, bottle, solids, tube)
• Sleep, naps, and night wakings
• Diapers — wet, dirty, color and consistency
• Pumping with side and amount
• Growth: weight, height, head circumference (WHO + CDC + Fenton charts)
• Immunizations and the full pediatric schedule
• Medicines with smart dosage calculator
• Doctor visits, allergies, jaundice, eczema, reflux, teething, and more
• Activities, mood, and parent wellbeing (EPDS)
DESIGNED FOR REAL LIFE
• Offline-first — works on a plane, in the basement, anywhere
• Apple Watch app + complications for one-tap logging
• Home and lock screen widgets
• Live Activities for active timers
• Siri Shortcuts and Quick Actions
• Beautiful in light and dark mode
SHARING
• Invite caregivers (partner, grandparent, nanny) to keep the same log in sync across devices
• Connect a pediatrician through their own portal so they can see growth and medical records — with your permission, on the modules you choose
• Generate doctor-ready PDF reports for visits
PRIVACY
• Your baby's data is yours. We never sell it.
• Your sign-in is end-to-end encrypted in transit. Your records sync over TLS 1.3.
• No advertising trackers. No third-party analytics on baby data.
LUCAS PREMIUM SUBSCRIPTION
Lucas is free to download and free to use the basics forever. Lucas Premium ($4.99/year, with a 7-day free trial) unlocks Insights, doctor-ready PDF reports, caregiver and pediatrician sharing, widgets, and the Apple Watch app.
• Title: Lucas Premium
• Length: 1 year (auto-renewing)
• Price: $4.99 per year (local price applies)
• Free trial: 7 days
Payment is charged to your Apple ID at confirmation of purchase. The subscription auto-renews unless canceled at least 24 hours before the end of the current period. You can manage or cancel anytime in iPhone Settings → Apple ID → Subscriptions.
Privacy Policy: https://lucas.ilbg.co/privacy.html
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Critical fix: app no longer crashes on launch on iOS 26.4.
• Fixed: launch crash caused by an over-strict migration plan that iOS 26.4.2 rejected. Removed the explicit plan; SwiftData handles migration automatically.
• Sleep redesigned (from 3.5.6): Lucas suggests naps based on gaps between feeds — tap to log one and adjust the times before saving. No more silent records.
• Reminders that actually fire: the next-feeding nudge refreshes after every save and every sync.
• Faster sync: pending records push within 1 second of saving.
• Crash recovery: a write-ahead log + auto-rebuild from server protects your data through any update or reinstall.
• "Changes waiting to sync" banner so you know if everything is saved.
• Spanish translations across the doctor portal.
The developer, Bryan Gutierrez, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
- User Content
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Contact Info
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Bryan Gutierrez
- Size
- 12.9 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Apple Watch
Requires watchOS 26.2 or later.
- iPhone
- Languages
- Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lucas Premium $4.99
- Copyright
- © 2026 ILBG
