280days: Pregnancy Diary

280days: Pregnancy Diary

By amane factory

280days is a shared pregnancy diary and health tracking app for expectant couples on iOS and Android.

The App DNA

What makes this app unique?

The app removes the communication friction between partners by syncing medical records and growth milestones into a single, shared digital space.

For Expectant parents seeking a shared digital space to track pregnancy milestones, health records, and memories.

What does it look like?

Key features

Couple Sharingedge

Syncs pregnancy records, medical checkups, and diary entries between two linked accounts.

Growth Illustrationsedge

Visualizes baby development with weekly updated illustrations and daily changing dialogue.

Memorial Book Exportedge

Converts app-stored diary entries, ultrasound photos, and records into a physical or digital book.

How much does it cost?

freemiumFree tier with ad-supported contentIn-app purchase for ad removal

The freemium model relies on high-frequency daily usage to drive ad inventory, with a direct IAP gate for ad removal.

Velocity

Maintenance developmentperformanceopaqueShow more...

With only one release in the observed window and a last update 43 days ago, the development momentum is classified as maintenance. The latest release focused exclusively on stability and performance improvements rather than new features or content. There is no evidence of a live-ops strategy or active feature development. The publisher maintains a low-frequency update schedule typical of a stable, mature product.

See all version history

Who built it?

amane factory

3 apps tracked · Parenting

トツキトオカ:夫婦で共有できる『妊娠記録・日記』アプリトツキトオカ:夫婦で共有できる『妊娠記録・日記』アプリコノトキ - 妊娠のために基礎体温、生理で排卵日予測コノトキ - 妊娠のために基礎体温、生理で排卵日予測
Explore the full publisher profile

User Sentiment

What do users think recently?

Fresh user feedback skews excited. Users appreciate daily developmental advice and baby growth tracking foster a strong emotional bond for expectant parents and the ability to create a printed keepsake book of pregnancy memories provides high long-term value, but report rigid registration requirements prevent users from setting up the app during early pregnancy stages.

How are ratings & reviews evolving?

Google Play
4.39 · 40k
App Store
4.75 · 481

What users say, by theme

What Users Love
  • Daily developmental advice and baby growth tracking foster a strong emotional bond for expectant parents
  • The ability to create a printed keepsake book of pregnancy memories provides high long-term value
  • Interactive illustrations and cute design elements keep the user experience engaging throughout the pregnancy journey
What Frustrates Users
  • Rigid registration requirements prevent users from setting up the app during early pregnancy stages
+ 2 more themes
What Users Want 2 requests inside

61 of 99 recent reviews analyzed · high confidence · Excited overall

Read the full review analysis

Unlock 2 more frustration themes and 2 user requests, each backed by review evidence.

Access the full report for free

Competition

Competitive landscape for 280days: Pregnancy Diary

How's the Parenting market?

280days maintains a 4.39 rating on Android and 4.75 on iOS, reflecting strong user satisfaction with its core shared-diary feature. The maintenance-mode release cadence suggests a stable, mature product rather than an aggressive growth phase.

Read the market outlook

The rivals identified

Unlock the deeper market read.

Access the full report for free

The Analyst's Read

Key takeaways for 280days: Pregnancy Diary

Where is it heading?

The pregnancy tracking market is shifting toward more inclusive and flexible user experiences, leaving 280days exposed due to its rigid registration and family-role assumptions. Maintenance-mode updates will likely result in gradual market share erosion unless the team addresses the sync instability and registration friction that currently limit the user funnel.

  • Persistent sync errors between partners erode the shared-experience value, which compounds the churn risk already visible in early-stage registration data.
  • The memorial book export feature continues to drive long-term retention, providing a clear differentiator that keeps users engaged throughout the full pregnancy cycle.

The SWOT

Core Strengths
  • Couple-sync mechanism creates high-switching-cost barrier
  • Memorial book export drives long-term retention
  • Daily growth illustrations foster consistent habit formation
Critical Frictions 3 weaknesses inside
Growth Levers
  • Expand family role settings for inclusivity
  • Add swipe gestures to improve navigation
Market Threats 1 threat identified

Next best moves

1 Pivot · 1 Invest

Remove mandatory baby name at registration because it is the top churn driver for early-stage users → increase new-user conversion

+ 1 more prioritized move

The counter-intuitive read

The app's rigid, traditional-family-focused design is a retention lever for its core demographic…

Read the full take

Since the last report: The report reflects a shift in competitive framing, moving from viewing the app's rigid design as a pure liability to recognizing it as a retention mechanism for a specific core audience. This update also incorporates iOS performance metrics to provide a broader view of the app's market standing.

Bottom line

280days retains core users through its shared-diary mechanism, but the rigid registration and sync instability create a leaky funnel that limits growth. Addressing these barriers would unlock higher long-term retention for the existing user base.

Unlock 3 critical frictions, 1 market threat, 1 more prioritized move and the analyst’s take.

Access the full report for free

FAQ

Is 280days suitable for single parents?
Users report that 280days currently assumes a traditional mother-father dynamic, which can make the experience less inclusive for single parents or non-traditional families.
Does 280days work offline?
While the app allows for some local recording, users report that persistent sync errors between partners often require a stable internet connection to ensure data visibility.
What is the difference between the free and paid versions?
The app is free to use, with an in-app purchase available to remove advertisements displayed at the bottom of the screen.

Sources

  1. [1] Play Store listing, source

Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by 280days: Pregnancy Diary, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

What's new

The report reflects a shift in competitive framing, moving from viewing the app's rigid design as a pure liability to recognizing it as a retention mechanism for a specific core audience. This update also incorporates iOS performance metrics to provide a broader view of the app's market standing.

shifted

Expanded Market Context

shifted

Contrarian Take Re-evaluation

added

Competitive Threat Identification

added

FAQ Pricing Clarification

Cite this report

Marlvel.ai. “280days: Pregnancy Diary Intelligence Report.” Updated Aug 5, 2026. https://marlvel.ai/apps/280days-pregnancy-diary

Agent Markdown (.md)See methodologyContact support

Data licensed under CC-BY-NC 4.0