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Ronnie
Open Ronnie
On iPhone and Android · No app store needed

Every heel prick, feed and nappy.One calm place.

Ronnie is an app for parents whose baby needs their blood sugars checked, and for the nurses, midwives and doctors caring for them. Log readings, feeds and nappies in a couple of taps, see what’s due next, and hand over in seconds.

Open Ronnie Parents or professionals? Free to log feeds, nappies and more. Inspired by the Starlight neonatal unit at Barnet Hospital

One app, made for both sides of the cot

Choose how you’ll use Ronnie when you first open it. You can switch any time, and nothing is mixed up.

For parents and carers

Your baby, on both your phones

  • Every heel prickwith which foot to use next
  • Feeds, sides and top-upswith timers that run on both phones
  • Shared with your partnerencrypted so only you two can read it
  • Questions for the ward roundjotted down at 3am, ticked off later
  • Free to useand a way to give back to Starlight
For nurses, midwives and doctors

Every cot on your shift

  • Several cots at onceby cot or bed label, never names
  • What’s due next, everywherechecks, feeds and nappies across your cots
  • One handover for the shiftcopy it or share it in a tap
  • Records stay on your phonenever sent anywhere, cleared at discharge
  • Free for NHS staffunlock everything with your NHS email
Blood sugars

Every reading, and when the next one’s due

Type the number from the meter in mmol/L, tap which heel it came from, and Ronnie shows whether it’s in your target range and counts down to the next check.

  • Suggests which heel to use next, so each foot gets a rest
  • Your own target range, set by your care team
  • Reminders on your phone when a check, feed or nappy is due
Logging a blood sugar of 4.6 mmol/L in Ronnie, with the left foot suggested for this reading
Low readings

Your team’s plan, the moment it’s low

Write down what your care team told you to do. When a reading comes in under your target, Ronnie puts that plan in front of you, with a button to call the ward and a reminder to recheck.

  • The plan in your team’s own words, shared with your partner’s phone
  • A quicker recheck reminder after a low
  • Always free, as is logging a low reading
A 3.3 mmol/L low reading in Ronnie, showing the care team’s plan and a button to call the ward
Feeds and expressing

Feeds, sides and timers

Breast, bottle or both. Time each side with a tap, add any top-up in ml, and Ronnie suggests which side to start on next.

  • Start a timer on one phone and stop it on the other
  • Expressed, formula or donor milk, by bottle, cup or tube
  • Expressing sessions, with how much and how long
A breastfeed timer running on the left side in Ronnie
Insights

See the pattern, not just the numbers

Blood sugars against your target band, feeds and nappies day by day, and how much time is spent on each side. Tap any point to see the reading behind it.

  • The last 24 hours, 3 days or week
  • A PDF report to show the doctors on the ward round
  • Read the readings off a paper obs chart with your camera
Ronnie’s insights: a blood sugar chart against the target band, with average, lowest and highest readings

Made for long nights and shift changes

The small things that make the early days easier, whoever is holding the baby.

Handover

A summary of the last few hours to copy or share with your partner, family or the nurses.

A handover summary of the last 12 hours: blood sugars, feeds and nappies

Questions for the doctor

Jot them down at 3am, tick them off on the ward round, and note the answers.

A list of questions to ask the doctor, with one answered

Both your phones

Share everything with your partner’s phone, encrypted so only the two of you can read it.

Ronnie’s More menu: questions, handover, plan for a low, reports and sharing

Easy on tired eyes

A dark mode for night feeds, big buttons, and text that’s easy to read half asleep.

Ronnie’s Today screen in dark mode
For NHS trusts and ward managers

Built so patient information stays on the ward

Ronnie is designed around the questions your information governance and clinical safety teams will ask.

  • Cot records stay on the phoneProfessional mode never syncs and never sends cot records to our server. Cots are labelled by bay and cot, never by name.
  • Patient details cropped out firstBefore a chart photo is read, staff frame just the readings and black out names, hospital numbers and labels. Only the framed part leaves the phone.
  • Asked, not assumedRonnie explains how photos are handled before the first scan, and reminds staff to scan only where their trust allows it.
  • Not kept, not trained onChart photos are read by Claude, made by Anthropic. We don’t store them, and they aren’t used to train AI models. Every reading is checked by a person before it’s saved.
  • An aide-memoire, not the recordStaff keep charting in the baby’s notes as usual. Handovers say to share only through the trust’s approved channels.
  • Encrypted, with no trackingFamilies’ shared records are encrypted on the phone (AES-GCM) with a key we never see. No adverts, analytics or tracking cookies, and NHS emails are kept only as a scrambled fingerprint.
Cropping a sample obs chart in Ronnie: a frame around the readings and a black box over the patient label, with a tick to confirm before sending
Ronnie’s Before you scan screen, explaining how chart photos are handled and asking staff to scan only where their trust allows it

Reviewing Ronnie for your unit? Email hello@ronnie.app for our data protection impact assessment and a summary of how data flows. The obs chart in these screens is a made-up example we created, not a real baby’s chart.

Why Ronnie exists

Named after our son, and made for the unit that cared for him

Ronnie spent his first days in the Starlight neonatal unit at Barnet Hospital, with blood sugars that needed checking around the clock. Between heel pricks, feeds, top-ups and nappies, the notes on scraps of paper soon got out of hand, so we built the app we wished we’d had.

It’s free for what matters day to day. Unlocking blood sugars after the first few days is a donation of any amount to the Starlight fund at Royal Free Charity (registered charity 1165672), made through JustGiving. 100% of your donation goes to the charity: Numeris Digital, who make Ronnie, receive nothing from it.

Our Starlight fundraiser

Free for what matters

No adverts and no tracking. A few extras help keep it running.

Ronnie

Free

Everything for day-to-day care, on as many phones as you like.

  • Feeds, nappies and expressing, with timers
  • Reminders, the plan for a low, and backups
  • Blood sugars free for your first 3 days

Blood sugars, for good

Any amount to Starlight

A one-off donation to the Starlight neonatal unit through JustGiving. Low readings can always be saved, donation or not.

  • 100% goes to Royal Free Charity. We receive nothing
  • Unlocks every phone you share with

The extras

£2.99 a month, or £24.99 a year

For families who want the full toolkit. Cancel any time.

  • Sharing between phones and shared timers
  • PDF and CSV reports, and chart scanning
  • Chart details, questions and handover sharing

NHS staff and Starlight families: unlock everything free with your NHS work email or a code from the ward.

On your Home Screen in ten seconds

Ronnie runs straight from your browser, so there’s nothing to download from an app store. Add it to your Home Screen and it opens like any other app, and works without signal.

Open Ronnie

iPhone

  1. Open app.ronnie.app in Safari.
  2. Tap Share, then Add to Home Screen.
  3. Open Ronnie from your Home Screen.

Android

  1. Open app.ronnie.app in Chrome.
  2. Tap Install app, or the menu then Add to Home screen.
  3. Open Ronnie from your apps.

Private by design

Your records stay on your phone. If you share between phones, they’re encrypted first, so not even we can read them.

Shaped by the NICU

Built from our own time on the Starlight unit, and free for NHS staff.

No adverts, no tracking

No adverts, no tracking cookies, and nothing sold. Ever.