// what we buildmodules()// shipped projectsdeploys/// who wrote thisgit blame// notes & guidesiterating++ // start()Start a project // langEspañol
Lyapp icon Live on the App Store iOS app · Family & health

Lyapp

The warm, private diary of a baby's first year: sleep, feeds, solids, appointments, vaccines and medications in one iOS app, personalized to their age.

Client
In-house product · iOS
Modules
Mobile apps
Year
2026
Stack
React Native · Live Activities · Dynamic Island
Lyapp home for Lay at 6 months, with an empty sleep ring and the button to start the timerLyapp weekly summary screen with sleep bars compared with the typical rangeLyapp Coach screen with cards of patterns found in the logs
// the challenge

Where we started

At 3 a.m. nobody wants to open a spreadsheet. New parents jot down sleep, feeds and appointments in scattered notes and can't tell whether what they see is normal for their baby's age. We wanted something fast to use one-handed, warm and 100% private.

Lyapp · iOS appLive on the App Store

Their sleep, at a glance

One tap starts a nap or the night. The timer stays alive on the Lock Screen and in the Dynamic Island.

See the full case →

Is this normal for their age?

The weekly summary compares every night with typical ranges by age from the American Academy of Pediatrics.

See the full case →

Patterns you would miss

The Coach reads your logs and tells you what changed this week. The AI only answers if you allow it.

See the full case →

A PDF for the pediatrician

Feeds, sleep, vaccines and medication in a report ready to share. Everything lives on your phone: no accounts, no cloud.

See the full case →
0:00
5:55●●● 100%
LGood afternoonLua · 14 months
Last feed 0m ago: 20 min · breastToday: 2 naps · 5 feeds · 1 solid
12.5htypical 11–14 h
SLEEP · TODAY
NIGHT10h 30mNAPS2h
Next sleep ~6:52 PM
Feed0m ago
Calendar9-month check
‹ Summary
Summary
Week of Sep 12–18
DAILY TOTAL13.6h avg✓ In range
13.5Sat12.8Sun15Mon14.4Tue13.7Wed13.1Thu12.5Fri
VS. 14-MONTH NORM

Babies at 14 months typically sleep 11–14 hours. Lua is in that range.

‹ Home
Coach
Good evening, Lua.Slept 10h 30m: 2 short stirs. 5 feeds logged today.
THINGS I NOTICED 4 new
A few more stirs overnight3 of the last 7 nights had two or more.
Something on the calendar9-month check in 2 days, 10:30 AM.
You're finding a nap rhythmNaps start within a 15-minute window.
‹ Home
Report
To share with the pediatrician
12h 30m todaySleep
310 ml · 5 feedsFeed
9-month well-baby checkNext event · Sep 20
PDF reportShare your logs
lua-report-sep.pdf
◉Live ActivityDynamic Island · live

Nap in progress: 0:00

✓AAP range14 months · 11–14 h

Weekly average 13.6 h, inside the typical range.

Privacy by designlocal data
0 accounts0 cloud0 ads
// what we built

What we shipped

git loglyapp-ios · main0/6 commits
  1. 5f72d08

    feat: Live sleep timer

    One tap starts a nap or the night. The timer lives on the Lock Screen and in the Dynamic Island with Live Activities.

    01.live-sleep-timer
  2. 95802ac

    feat: Feeding log

    Breastfeeding with a per-side stopwatch, bottles with milliliters offered and taken, and solids with foods and amounts.

    02.feeding-log
  3. cb8d850

    feat: Summary vs. pediatric ranges

    Weekly charts compared with typical ranges by age, based on American Academy of Pediatrics guidelines.

    03.summary-vs-pediatric-ranges
  4. 019adf4

    feat: Optional AI coach

    Spots patterns in the logs and answers questions only if the user explicitly allows it.

    04.optional-ai-coach
  5. 37a8398

    feat: Health agenda & reports

    Appointments, vaccines and medication with scheduled doses, plus PDF reports to share with the pediatrician.

    05.health-agenda-reports
  6. 6db593c

    feat: Privacy by design

    No accounts, no cloud, no ads and no trackers: all data lives on the phone.

    06.privacy-by-design
// impact

What changed

  • Live on the App Store: version 1.0 on August 29 and version 1.1 on September 21.
  • Version 1.1 added multiple babies, temperature logging with pediatric fever thresholds and a timer with pause.
  • Available in English and Spanish, built for families in any country.
1.1version shipped
0accounts or trackers
2languages
iOSReact Native

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