corrected age baby tracker
Two dates, one baby record
Keep the actual birth date and original due date separately instead of creating a duplicate profile or using a false birthday.
OBubba for corrected age baby tracker
Corrected age without changing the birthday.
Calculate a premature baby’s corrected age privately, then see how OBubba keeps birth date, original due date, milestones, growth context and care records together.
A clear answer
What is corrected age?
Corrected age, also called adjusted age, is chronological age minus the time a baby was born early. OBubba stores the real birth date and original due date separately, then uses corrected-age context for age-driven guidance and growth records when applicable. It does not replace neonatal or medical care.
What to look for
Keep both dates. Let the context adjust.
Parents should not have to create a second baby profile or replace the real birthday with the due date. OBubba keeps the chronological record intact and uses the original due date as separate corrected-age context.
corrected age baby tracker
Corrected-age context
OBubba uses corrected age for age-driven guidance, milestone context and supported growth views when its correction rules apply.
corrected age baby tracker
Everyday care stays together
Feeds, sleep, nappies, medicine notes, growth, milestones and family handovers stay on the same baby record.
Private calendar tool
Corrected age calculator
Use the real birth date and original estimated due date. This gives a calendar estimate for the date you choose.
Nothing entered here is sent, collected or saved by this page. This is a simple calendar calculation, not medical or developmental advice.
Keep the dates honest
Set up corrected age in OBubba
You need the actual date of birth and the original estimated due date. OBubba keeps both rather than overwriting one with the other.
Step 1
Enter the real birth date
During baby setup, use the date your baby was actually born. This remains the chronological record.
Step 2
Choose Born early or premature
Turn on the born-early option, then add the original estimated due date. OBubba validates that it comes after the birth date.
Step 3
Use one continuous record
Log feeds, sleep, nappies, growth, medicine and milestones normally. Corrected-age context is applied where the current app uses age-driven guidance.
Step 4
Share context, not a second profile
Use Partner Sync for another parent on the live record or Bubba Care for a private trusted-carer handover.
A calmer boundary
A date calculation is context, not an assessment
- The calculator below is a simple calendar calculation. It does not assess development, growth or health.
- Nothing entered into the calculator is sent, collected or saved by this page.
- Different appointments, screening tools or care decisions may use dates differently. Follow the method given by your neonatal team, health visitor, GP or paediatric professional.
- OBubba keeps the actual birth date and original due date separately; it does not ask a parent to disguise the due date as the birthday.
- The whole app is unlocked during pregnancy and through corrected age week 8. Current plan options apply after the early-free phase.
One record from dates to daily care
Corrected age belongs beside the real baby day.
The original due date supplies age context; it does not replace the real timeline. OBubba keeps feeds, sleep, nappies, growth, milestones and shared care on that same baby record.
Why this guide exists
Current parent questions and product evidence
Current parents are still asking for milestone apps that understand corrected age, and some describe workarounds such as changing the birthday or creating two profiles. NHS and CDC resources confirm corrected-age context is used for premature babies’ developmental milestones.
- NHS neonatal development guidance — Wirral University Teaching Hospital explains corrected age with a premature-baby milestone example and advises families not to compare directly with a full-term newborn.
- CDC Milestone Tracker — The CDC states that its milestone checklists adjust for prematurity using corrected age and that milestone tools do not replace developmental screening.
- Current parent request for preemie milestone apps — A July 2026 parent thread asks for an app that takes corrected age into account and describes due-date and duplicate-profile workarounds.
FAQ
corrected age baby tracker questions.
How do I calculate corrected age?
Subtract the amount of time a baby was born early from chronological age. Equivalently, count from the original due date to the date you want to view. The calculator on this page performs that calendar calculation.
Does OBubba replace the birth date with the due date?
No. OBubba stores the actual birth date and original due date separately, then applies corrected-age context where supported.
Where does OBubba use corrected age?
The current app uses corrected-age context for age-driven guidance, milestone context and supported growth views when its correction rules apply. Everyday care logs remain on the same real baby record.
Is this medical or developmental advice?
No. The calculator and OBubba are tracking and context tools. Follow the method and advice given by your neonatal team, health visitor, GP or paediatric professional.
Try OBubba
Keep corrected age and everyday care together
Download OBubba, enter the real birth date and original due date, then keep feeds, sleep, nappies, growth, milestones and shared care on one baby record.