App for Gmail SMS etc：CosmoSia
Communication
5 Million+ installs
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- CategoryCommunication
- PlatformAndroid
- Developer株式会社ACCESS
- In-app PurchasesYes
- Installs5 Million+
- Updated2026-10-02
- Size39 M
- Version4.18.4 rev:58b04d2 build:1284
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Editor's Review
Developed by 株式会社ACCESS, App for Gmail SMS etc：CosmoSia is a communication app available on Google Play. Its store tagline reads: "Email app for SMS Gmail Outlook Yahoo AOL iCloud Exchange IMAP POP3." It has passed 5 Million+ installs, and users rate it 3.8 out of 5 across 12.8K ratings. The latest version (4.18.4 rev:58b04d2 build:1284) was released on 2026-10-02, so the app is still being actively updated. Good to know: it offers optional in-app purchases and needs about 39 MB of storage.
How To Use?
Install App for Gmail SMS etc：CosmoSia from Google Play and open it
Allow only the permissions you are comfortable with
Complete the setup or sign-in steps if the app asks for them
Explore the main menu to find the key features
Keep the app updated for new features and fixes
Google Play
Description
CosmoSia is the best simple client application for email, SMS, and MMS which can manage your mailbox easily.
CosmoSia is a messaging application for sending and receiving email and SMS with the ability to serve as the default SMS handler.
*CosmoSia must be set as the default SMS application in order to use SMS.
- Just tap! The all-new "Reactions" feature
Get your feelings across without words: Just like in a chat, react to emails with emoji such as "👍", "❤️", and "👏".
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.
CosmoSia is the best replacement for your email or SMS client app because it supports all major email services, SMS/MMS and any other IMAP4 or POP3.
- Gmail
- Hotmail
- Yahoo mail
- AOL
- iCloud
- Outlook
- GMX
- Exchange
- SMS
- MMS
Easy to start
We provide a set for easy setting especially for Gmail, Outlook, Hotmail and SMS. You can start using it immediately.
Easy to use
CosmoSia love simplicity and are committed to make your email easy to read.
Read more
We do not provide the complicated functions that other mailers do. Simple Client CosmoSia is a simple mail client application that does not use an intermediate server. We declare that it is structurally impossible for us to see any user's ID, account info, password or email body. You can use CosmoSia app without concern that your information is being seen in the mailer service. Animation Emoji With CosmoSia, you can insert Emoji icons in emails. Decorate your email and enjoy it! We LOVE hearing your feedback and are so thankful for everyone supporting CosmoSia. If you need any help, please contact us from netfrontcommunicator-support_a-gr@access-company.com anytime.Screenshots
3.8
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