Comparison

Preside email vs CosmoSia

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

Head to head
About

Preside email

This app offers a full-featured mobile email client for comprehensive email management. It allows users to organize, send, and manage emails efficiently, providing desktop-level functionality on a mobile device. Features include advanced filing, folder management, and task integration.

Highlights
  • Predictive filing with shake-to-undo
  • Universal Inbox and custom 'Smart' folders
  • HTML rich composer with inline images
  • Offline, full-text email search
  • Assign Exchange categories and IMAP keywords
  • Add emails to various task management apps
  • Configurable swipe actions and color themes
Features
Read full description

Download Preside for calm control of your email. Preside is a full featured email client that allows you to perform all of your email management from your mobile device. No more waiting to get back to the desktop for organizing, assigning categories, sending or doing anything else with an email. No more reading emails twice. Preside improves your productivity and gives back valuable time. With Preside, you can file emails in seconds, even if you have thousands of folders. Preside gives YOU complete control by allowing you to optimize the app to exactly match your email management style. Preside is real email. It can do anything a desktop email client can do. Check out these awesome features: Filing • Files emails in seconds with predictive filing • Move emails between accounts • Copy emails & folders • Search for destination folders by name • Shake-to-undo previous filing action • Batch deletes and moves • File to favorite folders instantly • Swipe to file Folders • Expand & collapse folders • Find folders by searching • Add, move, rename, & delete folders • Off-line operation for later synchronization • Universal Inbox, Unread, & custom 'Smart' folders • Show all folders/labels for email Email Actions • Mark read/unread • Flag • Snooze/Defer • Batch processing • Custom multi-step actions Sending • HTML rich composer • Always bcc option • Inline images • Send attachments from iCloud, Dropbox, & more Search • Offline, full-text email search • Search by date, sender, subject, or anything else • Perform actions on search results • Stored searches • Search history Tags & Categories • Assign Exchange categories to emails • Tag emails with IMAP Keywords • Browse categories • Show all emails for a category • Show all cagetories in email • Color emails based on category Contacts • Edit/Add senders to iOS contacts • Quickly view all messages from any sender • Search To's, From's, Cc's, & entire message. Tasks & ToDos • Add emails to iPhone Calendar • Add emails Reminders, Exchange/Outlook & Toodledo • Add emails to OmniFocus, Appigo Todo, Things, The Hit List, Evernote, Drafts, Notebooks & more • Manage tasks in Reminders, Exchange/Outlook, & Toodledo Customization • Configurable swipe actions • Over 20 different color themes • Quickly change multiple options using Presets • Make the app look exactly like the iOS app • Configurable buttons, fonts, & everything else iPad • Split Screen Multi-Tasking • Multi-pane layout • Single-tap predictive filing • Drag and drop • Personalized layout options • Keyboard shortcuts iOS Features • Enhanced for 3D Touch • iOS Share extension support More • S/Mime encryption • Email threading with conversation view • Defer/Snooze emails • Passcode lock with Touch ID • Pull to sync • Speak emails • Real-time sync progress ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ ◆ Please contact us for any & all support issues. We'll help you to get the app working the way you like. Here's some more information that might be helpful: Privacy • Preside stores all information directly on your phone. • Our servers do NOT have access to your email or account information • All email communication is between your device and your email account. In app purchases • Preside really is free. We hope you'll purchase Premium, which adds some cool features, but none of those are essential to using the app. Please visit our website at: preside.io to learn more about Premium. Compatibility • Outlook • Office 365 • Exchange • IMAP (gmail, Rackspace, Yahoo, AOL, Comcast, iCloud, & any other modern email account). • POP3 (not recommended) Former Blackberry users • If you're missing features from your Blackberry that you'd like to see implemented in Preside, please contact us. Privacy • Preside is fully private. Preside doesn't transmit emails or account information to our servers.

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.

Screenshots

Preside email4 screens
CosmoSia4 screens

Verdict

The call

The clearest difference is review sentiment: Preside email at 93% against CosmoSia's 18%. Preside email also leads on rating (4.8 vs 1.0) and ads (none vs shown). CosmoSia's advantage is update cadence (every 3 weeks vs every 2 months). On price, in-app purchases 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. Preside email sells 2 one-off in-app purchases and CosmoSia sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Preside email holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Preside email has 184 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 93% of Preside email's written reviews are positive against 18% of CosmoSia's.

UpkeepUpdate frequency

Preside email ships an update every 2 months, CosmoSia every 3 weeks. The most recent releases landed on October 29, 2026 and October 18, 2026 respectively.

Scorecard7 real differences · 3 level
Preside email versus CosmoSia: the parameters behind the verdict, then further details
ParameterPreside emailCosmoSia
PriceFreeFree
Rating4.8 (184 ratings) — better1.0 (1 ratings)
Positive reviews93.3% of reviews — better17.9% of reviews
Number of ratings184 — better1
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better16.0
Further details — not scored
Size95 MB219 MB
Age rating17+4+
DeveloperGoodHumansACCESS CO., LTD.

Customer experience

Preside email

All ratings185 ratings
Positive94.6%
Neutral1.6%
Negative3.8%
Written reviews179 reviews
Positive93.3%
Neutral1.7%
Negative5.0%

CosmoSia

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

Bugs and requests

Preside email

Reported bugs

2 issues
  • Occasional syncing issues
  • Incompatibility with some email providers

Requested features

2 requests
  • Delayed outgoing messages
  • Improved attachment handling

CosmoSia

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Preside email

One-time2
  • Preside Premium - 1 month subscription$4.99
  • Preside Premium - 1 year subscription$24.99
1 purchases

CosmoSia

Subscriptions1
  • CosmoSia Mail Plan(Monthly)7 Days trial$2.991 Month

Questions

Is Preside email free?
Preside email is free to download, with in-app purchases available.
Is CosmoSia free?
CosmoSia is free to download, with in-app purchases available.
Which has better reviews, Preside email or CosmoSia?
Preside email is rated higher. Preside email averages 4.8 out of 5 from 184 ratings, while CosmoSia averages 1.0 from 1 ratings.
Do Preside email or CosmoSia have ads?
CosmoSia shows ads; Preside email does not.
Which is updated more often, Preside email or CosmoSia?
Preside email ships an update every 2 months, and CosmoSia every 3 weeks. Most recently, Preside email was updated on October 29, 2026 and CosmoSia on October 18, 2026.

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