Haruki Saburi

Known for

Piary

1app

Active nemesis

Daisuke Katayama

Other rivals

Publisher DNA

AI intelligence is not yet available for Haruki Saburi. The portfolio data below is up to date.

Portfolio

Apps

1 app analysed

Sort by

Piary

5.0(6)

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Daily event logging functionality provides necessary structure for users navigating complex legal custody battles
Missing biometric security for private entries

Tightly focused on 2 markets (Japan, United States).

Based on 1 of 1 app with localized market data · last scanned Jul 2026.

Americas (1)

User sentiment

Positive apps

Neutral / mixed

Negative apps

90/100

Avg sentiment score

Top performer

Piary

Thrilled sentiment

Rivals

The rivals identified

Nemeses(1)

Daisuke Katayama

known forSeal - Sticker calendar

1 app

So what?

Strategic outlook coming soon.

Frequently asked questions

How many apps does Haruki Saburi publish?

Haruki Saburi has 1 app tracked by Marlvel, primarily in the Lifestyle category.

What kind of apps does Haruki Saburi make?

Haruki Saburi's portfolio is concentrated in Lifestyle, with an average rating of 5.0/5 across rated apps.

Last updated

Piary

v1.8.5

2.7y ago

Asia-Pacific (1)

Japan1 / 1

Core markets (1/1 apps)

JapanUnited States

Seal competes directly for the same visual-diary user base by utilizing a calendar-centric interface to organize daily life events.

Contenders(1)

Yusuke Masuda

known for名言日めくりカレンダー

1 app0.0Lifestyle

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This app targets the same calendar-based lifestyle category but focuses on motivational content rather than personal photo documentation.

Same space(4)

Chanho Lee

known forDrawMyToday - AI Picture Diary

1 app4.3Lifestyle

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This app is a direct functional competitor that combines diary entries with AI-generated visual content.

Dev2A

known forJuJo: Creative Journal & Diary

1 app4.6Lifestyle

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Onda Labs

known forOndo: AI Journal

1 app5.0Lifestyle

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Stoic app

known forsolo. pen journaling companion

1 app4.6Lifestyle

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New entrants(2)

Amon Studio

known forLore: Every Chat Hides a Story

1 app0.0Lifestyle

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Lore enters the space by turning existing communication data into narrative stories, competing for the user's journaling time.

Ide Koshin

known forおうち新聞

1 app0.0Lifestyle

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What is Haruki Saburi's top app?

Based on user sentiment and following across the portfolio, Piary stands out as Haruki Saburi's flagship app tracked by Marlvel.

In how many countries are Haruki Saburi's apps available?

Marlvel has tracked Haruki Saburi's apps across 2 countries.

JuJo targets users interested in the creative aspect of journaling, overlapping with Piary's visual-first approach.

Ondo occupies the same digital journaling space but leverages AI to automate the reflection process.

Solo competes for the user's daily reflection time by providing structured prompts for personal growth.

This newcomer targets the family-oriented lifestyle market by automating the creation of a weekly summary.

Snapshot

Publisher DNA

Portfolio

Apps

Americas (1)

User sentiment

Rivals

The rivals identified

Nemeses(1)

So what?

Frequently asked questions

Asia-Pacific (1)

Core markets (1/1 apps)

Contenders(1)

Same space(4)

New entrants(2)