CosmoSia
Easy to use and full support!
Only for iPhone
Free · In‑App Purchases
iPhone
The email app with over 1 million users is now available for iOS
You can create XX@cosmosia.email which can be used like a carrier email
Easy to use and privacy friendly
Recommended for those who are considering moving away from carrier email.
You can create "XX@cosmosia.email" which is as easy to use as your carrier email!
Made in Japan, so you can be sure of your privacy.
Make your email more fun! The long-awaited iOS version of the free email app with over 1 million users is now available!
- Just tap! The all-new "Reactions" feature
Get your feelings across without words: Just like in a chat, react to emails with emoji.
Reaches the other person even without the app: When you add a reaction, the recipient automatically receives a clear notification email. No matter which email service they use — Gmail, docomo mail, Yahoo! Mail, and more — your "I saw it" comes through loud and clear.
Stay connected like a conversation: Even in group exchanges, you can see at a glance who reacted and how, so conversations keep flowing and stay fun.
- You can create your own email address!
You can create your own e-mail address such as XX@cosmosia.email.
You can use email addresses such as XX@cosmosia.email. The email address will be linked to your phone number like a carrier email address, so please consider this when you are thinking of moving from a carrier email address!
Email address is available only when you purchase the subscription "CosmoSia Email Plan (Monthly)".
We also recommend this service when you move to ahamo, povo, LINEMO, or other plans that do not include carrier email!
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- You can manage multiple email services at once.
IMAP4 (Gmail, docomo mail, etc.) is supported.
- It is a standard email application for low-cost smartphones and MVNOs.
It's easy to use, just like a carrier email, and it's popular among low-cost smartphone users!
- Easy to set up
Just set your email address and password and you're ready to go. Organize your mailbox now.
- No more unwanted e-mails!
We support a "reject list" function that allows you to prevent unwanted e-mails from entering your inbox.
- Basic functions are free!
The installation is free and the basic functions are free no matter how many times you use them.
A predetermined usage fee is required to use CosmoSia Mail.
You will have to pay for the communication charges incurred when sending and receiving emails.
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The following email services can be used
docomo mail
au-mail
R mail
Y! mobile mail
Yahoo! JAPAN mail
iCloud mail
Gmail
Outlook/Hotmail
mineo mail
so-net mail
BIGLOBE mail
We support the setup of many other email services.
* You cannot use your UQ mobile email address (XX@uqmobile.jp).
Please look forward to future updates for support of other mail services!
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About the trademark
docomo mail is a trademark of NTT DOCOMO, INC. in Japan.
Ratings & Reviews
Introducing "Reactions"! Make replying to emails easier and more fun. Send a quick "Got it," "Confirmed," or "Thanks" to the other person with a single tap — no need to write out a message. Backed by our proprietary patented technology (patent granted), it lets you expand your circle of communication safely and securely.
Fixed some bugs.
The developer, ACCESS CO., LTD., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Contact Info
- Contacts
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ACCESS CO., LTD.
- Size
- 229.9 MB
- Category
- Productivity
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
Messaging and Chat
- In-App Purchases
Yes
- CosmoSia Mail Plan(Monthly) $2.99
- Copyright
- © 2021-2026 ACCESS CO., LTD. All rights reserved.