Comparison

CosmoSia vs Encrypted Email

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CosmoSia

Create a personalized email address with your own domain, offering carrier-like ease of use and robust privacy features. Manage multiple email accounts, block unwanted messages, and enjoy a user-friendly interface. Ideal for those seeking a professional or custom email solution.

Highlights
  • Create custom email addresses
  • Manage multiple email accounts
  • Block unwanted emails
  • Easy setup
  • Carrier-like usability
  • Privacy-focused
Features
Read full description

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! ==================== - 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. ==================== 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! ==================== About the trademark docomo mail is a trademark of NTT DOCOMO, INC. in Japan.

About

Encrypted Email

This app provides a secure and private email service with integrated cloud storage, calendar, and contacts. It offers end-to-end encryption and password-protected emails for enhanced privacy. Ideal for individuals and businesses seeking a secure communication and collaboration platform.

Highlights
  • OpenPGP encrypted emails
  • Password-protected emails
  • Integrated cloud storage (Drive)
  • Shared calendars and contacts
  • Workspaces for collaboration
  • No tracking or ads
Features
Read full description

Mailfence is an encrypted email service that offers a secure and private Email suite with Drive and Workspaces. Restore Privacy says : "Mailfence is a fully-featured alternative to Gmail. Whether you are a regular privacy-conscious user or managing a business team, Mailfence can cater to your needs." The Mailfence app consists of different tools all integrated in an easy to use interface. Messages: • Create a @mailfence.com or @mf.me email address • Send and receive emails • Send and receive OpenPGP encrypted emails • Send Password-protected Emails to anyone • Switch between multiple mailboxes • Keep your inbox tidy and clean with folders, labels and swipes • Receive new email notifications • Your Mailfence email account can also be accessed in POP, IMAP & SMTP via third party email clients Drive / Cloud Storage: • Access your private and shared documents • Manage them with folders and labels • Share your documents with Mailfence users via workspaces / groups • Share documents by making them accessible publicly • Your Mailfence Drive can also be accessed in WebDAV via third party clients Calendar : • Access your private and shared calendars • Create and accept meetings • Layer different calendars • Share your Calendar publicly • Get reminders by email • Your Calendar can also be accessed through CalDAV or ActiveSync via third party clients Contacts / Address book : • Access your private and shared contacts • Manage your contacts with labels and comments • Search in your private and shared address books • Access your mailing lists • Your Mailfence Contacts can also be accessed through CardDAV or ActiveSync via third party clients Why use Mailfence? • No tracking : No ads, no spams, no trackers, no solicitations, no backdoor, free from government surveillance. • Privacy protection : State of the art security features protect your email privacy at all times. • An integrated suite of tools : Messages, Documents, Groups. • Legal protection : Belgian privacy protection law is strong. Only local judges can request information and they must have a court order. It rarely happens. • Workspaces : Share mailboxes, drives and collaborate in shared workspaces. Advanced sharing rights managed by group administrator. • Interoperable : User decides whether to encrypt emails or not. Interoperable with any other OpenPGP encrypted email. • Standard protocols : Interoperability with standard clients : Outlook, Mac Mail, Thunderbird,…. • Individual or teams : Ideal for individual users or professionals. Mailfence in the press: • In an article Kim Komando of Fox News wrote about Mailfence, "It's a great option for small business owners and ordinary users alike." • Lifehacker wrote, "Mailfence is a solid choice with office apps, it's more email- and calendar-focused compared to the comprehensive app suite of Kolab Now." • The ProPrivacy's Ray Walsh mentions in his article “Mailfence is a solid and easy-to-use email provider that is ideal for beginners." • Restore privacy's Sven Taylor wrote, “Mailfence has all the features and options that you are likely to need, whether you are looking to manage the mail for an entire organization, or just want great service for personal use” • Lifewire writes : “Mailfence is a security-centric email service that features end-to-end encryption to ensure nobody but you and your intended recipient can read your messages." For more information, check : • site : https://mailfence.com • support site : https://kb.mailfence.com • blog: https://blog.mailfence.com

Screenshots

CosmoSia4 screens
Encrypted Email4 screens

Verdict

The call

The clearest difference is rating: Encrypted Email at 4.0 against CosmoSia's 1.0. Encrypted Email also leads on in-app purchases (none vs 1) and ads (none vs shown). CosmoSia's advantage is update cadence (every 3 weeks vs every 2 months). On price and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CosmoSia sells 1 in-app purchase, starting at $2.99 per month. Encrypted Email asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Encrypted Email holds the better App Store score, 4.0 against 1.0. That said, the two scores are not equally well evidenced: Encrypted Email has 112 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 18% of CosmoSia's written reviews are positive against 42% of Encrypted Email's.

UpkeepUpdate frequency

CosmoSia ships an update every 3 weeks, Encrypted Email every 2 months. The most recent releases landed on October 18, 2026 and October 30, 2026 respectively.

Scorecard8 real differences · 2 level
CosmoSia versus Encrypted Email: the parameters behind the verdict, then further details
ParameterCosmoSiaEncrypted Email
PriceFreeFree
Rating1.0 (1 ratings)4.0 (112 ratings) — better
Positive reviews17.9% of reviews41.5% of reviews — better
Number of ratings1112 — better
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFreemium
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.013.4 — better
Further details — not scored
Size219 MB34 MB
Age rating4+4+
DeveloperACCESS CO., LTD.Contactoffice Group

Customer experience

CosmoSia

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews39 reviews
Positive17.9%
Neutral15.4%
Negative66.7%

Encrypted Email

All ratings44 ratings
Positive56.8%
Neutral6.8%
Negative36.4%
Written reviews65 reviews
Positive41.5%
Neutral12.3%
Negative46.2%

Bugs and requests

CosmoSia

Not enough reviews yet to summarise bugs or requests.

Encrypted Email

Reported bugs

15 issues
  • Unable to reach servers on phone app
  • App scrolls text off screen while typing
  • Emails going to spam folder
  • Login failures on iOS
  • App doesn't recognize login/password after update
Show 10 more
  • Account deactivated too quickly
  • Cannot sign up with valid recovery email
  • Account hacked
  • Cannot delete account
  • iPad app glitch: page scrolls up while typing
  • Notifications not working
  • Cannot send emails with attachments
  • Spam notifications even for spam emails
  • IMAP connectivity issues
  • App logs out from all devices frequently

Requested features

12 requests
  • Allow account creation with VPNs/privacy tools
  • More specific error messages during signup
  • Grace period and human review for signup false positives
  • Ability to mark emails as 'not spam'
  • Folder creation within the app
Show 7 more
  • Improved dark mode rendering
  • Sender icons
  • Landscape mode on iOS
  • Printing from mobile app
  • Calendar and notes integration in mobile app
  • Block sender feature
  • Ability to add other email providers

In-app purchases

1 purchases

CosmoSia

Subscriptions1
  • CosmoSia Mail Plan(Monthly)7 Days trial$2.991 Month
None

Encrypted Email

No in-app purchases

Questions

Is CosmoSia free?
CosmoSia is free to download, with in-app purchases available.
Is Encrypted Email free?
Encrypted Email is free to download, with no in-app purchases.
Which has better reviews, CosmoSia or Encrypted Email?
Encrypted Email is rated higher. CosmoSia averages 1.0 out of 5 from 1 ratings, while Encrypted Email averages 4.0 from 112 ratings.
Do CosmoSia or Encrypted Email have ads?
CosmoSia shows ads; Encrypted Email does not.
Which is updated more often, CosmoSia or Encrypted Email?
CosmoSia ships an update every 3 weeks, and Encrypted Email every 2 months. Most recently, CosmoSia was updated on October 18, 2026 and Encrypted Email on October 30, 2026.

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