Comparison

280days vs Baby Billy

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

280days

Track your pregnancy journey with daily updates on your baby's growth and your physical condition. Share milestones and photos with your partner, and turn your records into a keepsake book.

Highlights
  • Baby growth visualization with illustrations
  • Daily physical condition and medical checkup tracking
  • Shared pregnancy records with spouse
  • Maternity photo and memory diary
  • Week-by-week pregnancy advice
  • Pregnancy countdown and weight management
  • Export records as a book
Features
Read full description

[Learn how the baby in your tummy is growing!] [Can be shared with your spouse!] [Turn your pregnancy records into a book!] *********************** Enjoy your pregnancy even more! *********************** 280days is a pregnancy record and diary app that allows you to further enjoy your pregnancy. Enjoy creating pregnancy records and diary entries as a couple and share information on the baby's condition and Mommy's physical condition with each other. The pregnancy records you created can be exported as a book later. You can thereby preserve your priceless memories saved in 280days in a single book. ======================= A request from 280days Support Office   ーーーーーーーーーーーーーーーーーーーーーーー Writing an AppStore review about the specific issues you are facing when using the app will not allow us to help you solve the issues, as we will not be able to check any detailed information through the review. If you run into any issues, please contact us through the app, or email us at totsukitoka.support@amanefactory.com. We will assist you to the best of our abilities. We apologize for any inconvenience we may cause, and thank you for your cooperation. ======================= *********************** Visualize the baby in your tummy with cute illustrations! *********************** Check on the baby in your tummy every day! The cute illustrations of the baby will make different adorable gestures each time you open the app, and will grow based on the number of weeks of your pregnancy. The baby will also talk whenever you tap on the baby. The baby's lines changes every day, and will send you messages of encouragement and information on the baby's condition. *********************** Fully manage your physical condition and memories! *********************** Manage your physical condition and medical checkups daily with just this app! By recording your physical condition and medical checkup results, you can manage your ultrasound photos and weight records all at once. In addition, you can save your maternity photos and memories of your pregnancy as a photo diary together with your spouse. *********************** First-time Mommy or Daddy? No problem! *********************** The week-by-week advice in 280days all come with illustrations! Enjoy reading and learning how the baby is growing, how Mommy's physical condition changes and advice on how she could spend her time at each week of her pregnancy. Mommy's physical condition records and the baby's condition can be shared with Daddy. There are also plenty of advice for Daddy at each week of the pregnancy. 280days will enable Daddy to understand pregnancy better and help improve the communication between couples. *********************** All the functions necessary during pregnancy in one app! *********************** This app is fully equipped with functions to support you throughout your pregnancy, such as pregnancy countdown and weight management graphs! Enjoy your pregnancy even more by taking a commemorative photo of the baby's illustrations and upload it to your SNS, or send message cards celebrating your baby's growth! *********************** Turn your pregnancy records into a book! *********************** You can export all your pregnancy records saved in 280days to an easy-to-read layout exclusively for books. Preserve your priceless memories of your pregnancy saved in the app, such as ultrasound photos, maternity photos, diary entries and the cards you exchanged, in a single book. ======================= ◆For enquiries ======================= We check the reviews from time to time to receive valuable feedback and opinions from our users. However, for any enquiries, requests or issues regarding the app, please email us at: totsukitoka.support@amanefactory.com *********************** 280days connects the family during pregnancy, and nurtures new ties. We hope you enjoy a wonderful 280 days. The development team of 280days

About

Baby Billy

Track your pregnancy week by week with expert advice on mom and baby's development. Connect with a supportive community of parents for tips and share your journey with family.

Highlights
  • Week-by-week pregnancy tracking
  • Baby development milestones
  • Expert prenatal care guidance
  • Parenting community forum
  • Photo gallery
  • Personal diary
Features
Read full description

▶ The best prenatal care guidance is here! From the moment you realize your pregnancy, it changes everything. Combating morning sickness, shopping for a baby's room, scheduling doctor’s visits, remembering to take your prenatal vitamins... We know there’s so much to keep tabs on! But no worries! We're here to help! ▶ Tracking week-by-week changes of mom and baby Baby Billy provides weekly tips to see if your baby is meeting their milestones. You can have instant access to expert advice on baby's developmental milestones, from mental, physical, emotional, and linguistic health. There are hundreds of articles and images to help you understand your weekly changes! ▶ Your BFFs are waiting! You can connect with millions of other like-minded parents who are currently going through or have overcome the pregnancy ride. It can be especially tough and overwhelming if you're trying to do it alone and feeling like no one can empathize with you. You probably encounter people who may be going through the exact anxieties, stresses, and joys of pregnancy and parenting at the same time. Join your BFF community and get some tips from baby name ideas to a shopping list for essential items during and after pregnancy. ▶ Sharing with family You can share tips written by experts to your partner, family members and friends and get some supports! You can even create a whole gallery of your baby's photos and feel proud of how your little angel is growing up. ▶Diary Baby Billy gives you a variety of record-keeping, scheduling and communication tools to communicate with not only others but also yourself. Pregnancy and parenting aren't easy, and it never hurts to have a shoulder to lean on and a place to be vulnerable. The ride itself is not always full of laughters but sometimes is filled with mood swings and moodiness. Let all of these inner feelings out, relax and Baby Billy is right here to hear you out. ▶Baby Billy wishes you all the best on this journey. If you have any questions, please feel free to contact us. - Homepage : https://babybilly.co/en - Instagram: https://www.instagram.com/babybilly.global/

Screenshots

280days4 screens
Baby Billy4 screens

Verdict

The call

The clearest difference is in-app purchases: Baby Billy at none against 280days's 2. Baby Billy also leads on ads (none vs shown) and update cadence (weekly vs every 2 months). On price, rating, review sentiment and ratings volume there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 280days sells 2 one-off in-app purchases. Baby Billy asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for 280days against 4.9 for Baby Billy. Both are backed by a comparable volume of ratings — 482 and 233 respectively. Written reviews are what separate them: 88% of 280days's written reviews are positive against 93% of Baby Billy's.

UpkeepUpdate frequency

280days ships an update every 2 months, Baby Billy weekly. The most recent releases landed on September 22, 2026 and September 23, 2026 respectively.

Scorecard4 real differences · 6 level
280days versus Baby Billy: the parameters behind the verdict, then further details
Parameter280daysBaby Billy
PriceFreeFree
Rating4.8 (482 ratings)4.9 (233 ratings) — better
Positive reviews87.8% of reviews93.4% of reviews — better
Number of ratings482 — better233
Update frequencyEvery 2 monthsWeekly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size91 MB267 MB
Age rating17+12+
Developeramane factory inc.VillageBaby Inc

Customer experience

280days

All ratings482 ratings
Positive94.0%
Neutral2.3%
Negative3.7%
Written reviews452 reviews
Positive87.8%
Neutral4.2%
Negative8.0%

Baby Billy

All ratings233 ratings
Positive97.9%
Neutral0.9%
Negative1.3%
Written reviews273 reviews
Positive93.4%
Neutral2.9%
Negative3.7%

Bugs and requests

280days

Reported bugs

3 issues
  • Diary entries getting deleted
  • Unable to link accounts between devices
  • Notifications not working as expected

Requested features

5 requests
  • Add option to report pregnancy loss
  • Improve app stability and performance
  • Allow changing baby's name and gender
  • Provide more skin tone options for baby
  • Support single parents and LGBTQ+ families

Baby Billy

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

280days

One-time2
  • Ad Banner remove$1.99
  • BABY BOOK data ver.(PDF)$3.99
None

Baby Billy

No in-app purchases

Questions

Is 280days free?
280days is free to download, with in-app purchases available.
Is Baby Billy free?
Baby Billy is free to download, with no in-app purchases.
Which has better reviews, 280days or Baby Billy?
Baby Billy is rated higher. 280days averages 4.8 out of 5 from 482 ratings, while Baby Billy averages 4.9 from 233 ratings.
Do 280days or Baby Billy have ads?
280days shows ads; Baby Billy does not.
Which is updated more often, 280days or Baby Billy?
280days ships an update every 2 months, and Baby Billy weekly. Most recently, 280days was updated on September 22, 2026 and Baby Billy on September 23, 2026.

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