Best First Due Size Up Apps

36+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated October 2026

The best first due size up apps on iPhone average 4.4β˜… across 36+ titles β€” we've ranked them by what real users actually keep on their phones. Updated October 2026.

Compare top First Due Size Up Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1First Due MobileFirst Due MobileFree2.8β˜… (835)NoNoOct 2026
2How Big Now: Baby Size TrackerHow Big Now: Baby Size TrackerFreeβ€”NoYesOct 2026
3Pregnancy Tracker App - WTEPregnancy Tracker App - WTEFree4.9β˜… (380K)YesNoOct 2026
4Size Chart ProSize Chart ProFreeβ€”NoNoMay 2026
5BabyCenter Pregnancy TrackerBabyCenter Pregnancy TrackerFree4.9β˜… (298K)YesNoOct 2026
6First Hello: New Dad ChecklistFirst Hello: New Dad ChecklistFreeβ€”NoNoOct 2026
7First Due Mobile - FedRAMPFirst Due Mobile - FedRAMPFree1.5β˜… (8)NoNoOct 2026
8First DueFirst DueFreeβ€”NoNoAug 2026

Top Picks for First Due Size Up

First Due Mobile#1

First Due Mobile by Locality Media, Inc.

For a safer & faster response
Editor's Choice
πŸ“Š Productivity
2.8😐(835 ratings)
Free
First Due Mobile screenshot 1
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First Due Mobile screenshot 6

Receive real-time incident notifications and navigate directly to emergencies with optimized routing. Access critical building data, pre-plans, and team communication tools for enhanced situational awareness and faster response.

What We Love

  • πŸš€ Accurate incident information
  • πŸ“Š Valuable pre-planning and response data
  • πŸ—ΊοΈ Helpful mapping and navigation features
  • πŸ’‘ Comprehensive all-in-one solution

Room to Improve

  • πŸ› Frequent crashes and stability issues
  • πŸ“± Clunky and unintuitive mobile interface
  • ⏱️ Slow incident notifications and app loading
  • πŸ”‡ Lack of customizable alert tones and settings
  • 🀯 Overwhelming number of features, poor usability
Pregnancy Tracker App - WTE#3

Pregnancy Tracker App - WTE by Everyday Health, Inc.

Track Baby's Weekly Growth
Worth Considering
πŸ₯ Medical
4.9😊(380K ratings)
FreeAds
#25in Medical
Pregnancy Tracker App - WTE screenshot 1
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Pregnancy Tracker App - WTE screenshot 5
Pregnancy Tracker App - 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

  • πŸš€ Helpful information and videos
  • πŸ‘ Useful for tracking pregnancy and baby's development
  • πŸ‘ Great community support
  • πŸ‘ Easy to use and navigate
  • πŸ‘ Accurate and informative
  • πŸ‘ Comprehensive features
  • πŸ‘ Valuable resource for first-time moms

Room to Improve

  • πŸ› Freezing and lagging issues
  • πŸ” Inaccurate baby size comparisons
  • πŸ’¬ Toxic and unsupportive community
  • 🚫 Excessive ads and notifications
  • 🚫 Outdated or biased information
  • 🚫 Gender-specific language and assumptions

More First Due Size Up apps to explore

FAQ about First Due Size Up

What are the best first due size up apps for iPhone?
First Due Mobile tops our first due size up apps ranking as of October 2026, with a 2.8-star average from 835 App Store ratings, and it's free to download.
Yes β€” 20 of the top first due size up apps we rank are free to download, including First Due Mobile and How Big Now: Baby Size Tracker.
First Due Mobile has no ads and has no in-app purchases, according to its App Store listing as of October 2026.
We track 36+ first due size up apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.