Best Baby Size Apps

248+ iOS apps curated and reviewed

4.8 avg rating
19 free apps
Updated August 2026

Out of 248+ baby size apps on iOS, 19 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Baby Size Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Pregnancy Baby Tracker - WTEPregnancy Baby Tracker - WTEFree4.9★ (378K)YesNoAug 2026
2Pregnancy + | Tracker AppPregnancy + | Tracker AppFree4.8★ (75K)YesYesAug 2026
3The Bump: Baby & Pregnancy AppThe Bump: Baby & Pregnancy AppFree4.8★ (39K)YesNoAug 2026
4Coconut Baby: Track PregnancyCoconut Baby: Track PregnancyFree4.7★ (120)NoYesAug 2026
5BabyCenter Pregnancy TrackerBabyCenter Pregnancy TrackerFree4.9★ (294K)YesNoAug 2026
6Babylist Baby RegistryBabylist Baby RegistryFree4.9★ (138K)NoNoAug 2026
7Pregnancy Tracker: Baby BumpPregnancy Tracker: Baby BumpFree4.6★ (7.5K)NoNoAug 2026
8Little Sprout - Baby TrackerLittle Sprout - Baby TrackerFreeNoYesJul 2026

Top Picks for Baby Size

Pregnancy Baby Tracker - WTE#1

Pregnancy Baby Tracker - WTE by Everyday Health, Inc.

Track Development & Growth
Editor's Choice
🏥 Medical
4.9😊(378K ratings)
FreeAds
#31in Medical
Pregnancy Baby Tracker - WTE screenshot 1
Pregnancy Baby Tracker - WTE screenshot 2
Pregnancy Baby Tracker - WTE screenshot 3
Pregnancy Baby Tracker - WTE screenshot 4
Pregnancy Baby Tracker - WTE screenshot 5
Pregnancy Baby Tracker - WTE screenshot 6

This app guides you through pregnancy and early parenthood with weekly updates, development trackers, and expert advice. It helps you monitor your baby's growth, manage symptoms, and connect with other parents.

What We Love

  • 🚀 Helpful information and videos
  • 👍 Useful for tracking pregnancy and baby's development
  • 👍 Great community support
  • 👍 Easy to use and navigate

Room to Improve

  • 🐛 Freezing and lagging issues
  • 🔍 Inaccurate baby size comparisons
  • 💬 Toxic and unsupportive community
Pregnancy + | Tracker App#2

Pregnancy + | Tracker App by Philips Digital UK Limited

Pregnant? Join over 80m moms!
Strong Contender
🏥 Medical
4.8😊(75K ratings)
FreeAdsIn-App Purchases
#4in Medical
Pregnancy + | Tracker App screenshot 1
Pregnancy + | Tracker App screenshot 2
Pregnancy + | Tracker App screenshot 3
Pregnancy + | Tracker App screenshot 4
Pregnancy + | Tracker App screenshot 5
Pregnancy + | Tracker App screenshot 6

Track your pregnancy week-by-week with expert advice, daily articles, and interactive 3D models of your baby's development. Features include a due date calculator, kick counter, and tools to plan for labor and organize appointments. Join millions of expecting parents worldwide.

What We Love

  • 🚀 Excellent pregnancy tracking app
  • 👍 Informative and useful features
  • 💡 Realistic 3D baby visuals
  • 👍 Helpful weekly updates and articles

Room to Improve

  • 🐛 Inaccurate due date and week calculations
  • 🐛 Bugs with loading articles and content
  • 💰 Paywall after 14 weeks
The Bump: Baby & Pregnancy App#3

The Bump: Baby & Pregnancy App by The Knot Inc.

Baby Tracker, Growth & Names
Worth Considering
💪 Health & Fitness
4.8😊(39K ratings)
FreeAds
The Bump: Baby & Pregnancy App screenshot 1
The Bump: Baby & Pregnancy App screenshot 2
The Bump: Baby & Pregnancy App screenshot 3
The Bump: Baby & Pregnancy App screenshot 4
The Bump: Baby & Pregnancy App screenshot 5
The Bump: Baby & Pregnancy App screenshot 6

This app is a comprehensive pregnancy and baby tracker for expecting and new parents. It offers weekly updates on baby's growth with fun comparisons, a baby name finder, and daily advice from experts. It also includes helpful tools like a due date calculator, kick counter, and a food safety guide.

What We Love

  • ⭐ Excellent pregnancy tracking and information
  • 💻 Detailed weekly updates and 3D visuals
  • 📚 Comprehensive articles and resources
  • 🤰 Helpful for first-time and experienced moms

Room to Improve

  • 🐛 Occasional app crashes and glitches
  • 🤔 Inconsistent or outdated content in some articles
  • 📊 Lack of personalization and customization options

More Baby Size apps to explore

4
Coconut Baby: Track Pregnancy
Coconut Baby: Track Pregnancy
Coconut Baby: Track Pregnancy
Bump Size & Growth Tracker App
Free

This app offers a fun, weekly pregnancy countdown with size comparisons to everyday objects. Visualize your baby's growth and learn interesting facts throughout your pregnancy journey. Share your progress with loved ones and capture memorable "Belly Selfies."

Weekly pregnancy countdownBaby size comparisons to objectsFun pregnancy facts
💪 Health & Fitness
(120)
free with in-app purchases
5
BabyCenter Pregnancy Tracker
BabyCenter Pregnancy Tracker
BabyCenter Pregnancy Tracker
Track Baby Daily & Get Rewards
Free

This app helps you track your pregnancy week-by-week, monitor your baby's development, and access expert advice. It also offers a loyalty program for exclusive discounts and a community forum for support.

Week-by-week pregnancy tracking3-D fetal development videosLoyalty program for discounts
🏥 Medical
(294K)
free with in-app purchases
6
Babylist Baby Registry
Babylist Baby Registry
Babylist Baby Registry
One registry for any store
Free

This app helps expecting parents create a universal baby registry by allowing them to add items from any store and compare prices. It also offers a pregnancy tracker, checklists, expert guides, and baby name inspiration.

Universal registry for any storePrice comparison across retailersWeekly pregnancy tracker
🛍️ Shopping
(138K)
free with in-app purchases
7
Pregnancy Tracker: Baby Bump
Pregnancy Tracker: Baby Bump
Pregnancy Tracker: Baby Bump
Contraction timer,kick counter
Free

This app guides expectant mothers through pregnancy with weekly updates on baby and body changes. It offers tools like a kick counter and contraction timer, alongside tips for a healthy pregnancy and fetal development visuals.

Weekly baby and body change informationFetal development images and videosKick counter
🏥 Medical
(7.5K)
free
8
Little Sprout - Baby Tracker
Little Sprout - Baby Tracker
Little Sprout - Baby Tracker
Pregnancy size week by week
Free
🏥 Medical
(0)
9
SizeSeason: Baby Clothes Size
SizeSeason: Baby Clothes Size
SizeSeason: Baby Clothes Size
WHO Growth Tracker & Predictor
$1.99
🌟 Lifestyle
(0)
10
Baby Diaper Size Tracker
Baby Diaper Size Tracker
Baby Diaper Size Tracker
Growth Chart & Next Size Alert
Free

This app helps parents track their baby's growth and predict when they'll need a larger diaper size. It uses WHO growth charts to avoid wasted money on ill-fitting diapers and prevent blowouts.

Track baby's weight and heightWHO growth chart integrationNext size up alerts
🏥 Medical
(8)
ad-supported
11
HiMommy: Ovulation & Pregnancy
HiMommy: Ovulation & Pregnancy
HiMommy: Ovulation & Pregnancy
Period & Cycle tracker, Baby
Free

This app assists users throughout their journey to motherhood, from tracking cycles and fertility to monitoring pregnancy and newborn care. It offers daily baby development updates, health tips, and tools for tracking physical changes and baby's milestones.

Menstrual and ovulation calendarFertility symptom trackingDaily baby development updates
🏥 Medical
(5.3K)
free with in-app purchases
12
How Big is Baby Today?
How Big is Baby Today?
How Big is Baby Today?
Baby's size, every day
Free

Track your baby's development daily with size comparisons, estimated cell counts, and gestational age. Input ultrasound measurements to adjust predictions. This app provides fun, informational estimates based on population averages.

Daily size comparisonsEstimated cell countGestational age tracking
🔧 Utilities
(3)
free with in-app purchases
13
Kids Size Finder
Kids Size Finder
Kids Size Finder
Clothing Sizes for 36+ Brands
Free
🛍️ Shopping
(0)
14
Baby Heartbeat - Tiny Pulse
Baby Heartbeat - Tiny Pulse
Baby Heartbeat - Tiny Pulse
Bond During Pregnancy
Free
💪 Health & Fitness
(0)
15
Pregnancy & Baby Milestone Photos
Pregnancy & Baby Milestone Photos
Pregnancy & Baby Milestone Photos
by Vitaliy Odarchenko
Free
📷 Photo & Video
(0)
16
Ever & Ever Baby
Ever & Ever Baby
Ever & Ever Baby
Nursery Gifts & Gear
Free
🛍️ Shopping
(0)
17
The Tiny Chest: Baby Wardrobe
The Tiny Chest: Baby Wardrobe
The Tiny Chest: Baby Wardrobe
Clothing organiser & tracker
Free
🌟 Lifestyle
(0)
18
buybuy BABY
buybuy BABY
buybuy BABY
Welcome to Parenthood
Free

Discover a wide selection of nursery furniture, strollers, car seats, and playroom essentials from trusted brands. This app simplifies shopping for baby and child products, offering deals and registry management.

Shop nursery furniture and decorBrowse strollers and car seatsDiscover playroom essentials
🛍️ Shopping
(78K)
free with in-app purchases
19
Joker Baby – Online Shopping
Joker Baby – Online Shopping
Joker Baby – Online Shopping
Baby Stroller, Toys, Clothing
Free
🛍️ Shopping
(0)
20
Diaper Tower: Baby Tracker
Diaper Tower: Baby Tracker
Diaper Tower: Baby Tracker
Every diaper builds your tower
Free
💪 Health & Fitness
(0)

FAQ about Baby Size

What are the best baby size apps for iPhone?
Pregnancy Baby Tracker - WTE tops our baby size apps ranking as of August 2026, with a 4.9-star average from 378K App Store ratings, and it's free to download.
Yes — 19 of the top baby size apps we rank are free to download, including Pregnancy Baby Tracker - WTE and Pregnancy + | Tracker App.
Pregnancy Baby Tracker - WTE shows ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 248+ baby size apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
This app serves as a comprehensive guide for pregnancy and early parenthood. It offers week-by-week insights into baby development, helps track symptoms and milestones, provides expert advice, and connects users with a community of parents.
Key features include a due date calculator, week-by-week pregnancy updates, baby growth tracking, daily personalized tips, symptom logging, a baby feeding and diaper tracker, and community forums for support.

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