Unifying Family Conversations, Memories, and Schedules: Family-Exclusive App 'memStock' Officially Released on May 20 with New Android Version and Integrated Calendar

Modo Co., Ltd. (Headquarters: Shibuya-ku, Tokyo; Representative Director: Naoki Yamada) officially released the full version of the family-exclusive app "memStock" (https://memstock.com) on Wednesday, May 20, 2026. On the same day, the company launched the highly anticipated Android version and a new "Calendar Function" that can be created for each talk room. memStock is now fully operational as a communication app designed for families to manage "conversations, memories, and schedules" all in one place.

memStock is designed without advertisements and employs a closed architecture. It aims to be an app that everyone from children to grandparents can use without hesitation.

(*Note: The "Calendar Function" and "Shared Album Function" for the Android version will be implemented in future updates.)

Service Launch: May 20, 2026

Transitioning from Beta to Official Release: Addressing the Social Issue of 'Fragmented Family Information'

Since the release of the iOS beta version in November 2025, the company has been continuously improving the app based on user feedback. In recent years, with the rise of dual-income households, diversifying family structures, and the prevalence of SNS and messaging apps, communication and information within families tend to be scattered across multiple services and devices. In group chats of general messaging apps, topics like shopping, travel, and school events get mixed up, causing important information to be buried. Photos are scattered across clouds and individual devices, while schedules are managed separately in calendar apps.

To address this contemporary challenge of fragmented family information, memStock unifies conversations, photos, and schedules in one place under the concept of "Stocking family memories."

In this official release, in addition to "Topic-based Talk Rooms" and "Talk-linked Albums," the app has evolved with the newly developed "Calendar Function" for sharing family schedules and the "Android Version" to broaden the usage environment significantly.

Two Core Values of memStock: A Closed Design that Respects Family Time

1. Focus on Precious Family Time Users will not be interrupted by ads while talking with family or looking back at memories. The design, which does not rely on advertising, reduces concerns about children seeing inappropriate information and allows families to enjoy their time together with peace of mind.

2. A Completely Closed Design: No Connections Outside the Family memStock is a fully closed app accessible only to invited family members. - No messages from strangers. - No public timelines or "Add Friends" features. - No risk of children coming into contact with unknown adults.

By structurally eliminating the risk of contact with third parties—a common concern in general SNS and chat apps—it provides a safe environment for households where children carry smartphones.

Major New Features in the Official Version

<New Feature 1 | Calendar Function Linked to Talk Rooms> The official version includes a "Calendar Function" that allows a dedicated calendar to be linked to each talk room. - Organize schedules by topic, such as "Travel," "School Events," or "Lessons." - Real-time schedule sharing among family members. - Eliminates the need to scroll through past chats to find specific dates. By linking chats and schedules, it prevents misunderstandings like "I said/didn't say" or "I didn't hear about it," facilitating smooth coordination for dual-income or extended families.

<New Feature 2 | Android Version Released Simultaneously> The Android version, which was highly requested since the beta, was released on the same day as the official launch (May 20). This allows families with mixed iPhone and Android users to communicate comfortably within the same app. *In the current Android version, the "Calendar Function" and "Shared Album Function" are not yet implemented. They will be added sequentially in future updates.

Features Continued from Beta

<Continued | Topic-based Talk Rooms> This core feature of memStock solves the daily problem of losing important information when topics switch from shopping to travel planning. By organizing conversations into topic units, users can reliably track necessary information even when the subject changes.

<Continued | Photo Albums Linked to Talk Rooms> Albums can be linked to each talk room, allowing photos to be organized by theme, such as travel, school events, or pet growth.