Comparison

Mail Folders vs MailCat

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

Head to head
About

Mail Folders

Organize your IMAP email account by creating and managing custom folders. Automatically redirect emails from your inbox to designated folders based on set rules. Supports popular IMAP servers like Gmail, MobileMe, and AOL.

Highlights
  • Create and remove IMAP mail folders
  • Move emails into custom folders
  • Folder redirection based on rules
  • Supports Gmail, MobileMe, AOL
  • Organize inbox efficiently
Features
Read full description

This is an iOS application that creates/removes mail folders in your Imap mail account. You may be able to organize your emails by moving into folders other than the INBOX. You may also be able to use folder redirection that moves your email from INBOX to other mail folders according to the redirection rules. Supports Imap mail servers such as Gmail, MobileMe,AOL and Softbank. Imap server names are as follows: Gmail: imap.gmail.com MobileMe: mail.me.com AOL: imap.aol.com Please visit our web site for detailed error codes etc.

About

MailCat

This app helps organize your inbox by automatically categorizing emails using machine learning and custom rules. It can filter spam and move messages to designated mailboxes, supporting IMAP accounts.

Highlights
  • Machine learning spam filtering
  • Rule-based email categorization
  • IMAP account support
  • Move emails to specified mailboxes
  • Blacklist and spam learning data
  • Multiple account switching
Read full description

■MailCat is a Mail Categorizer: MailCat is a Mail Categorization App.
 MailCat has two kinds of categorization method --- a machine learning categorization and a rule based categorization.
MailCat can filter out spams from the incoming mail messages by the machine learning categorizer,
and move mail messages to the specified mailbox by rules. MailCat has no mail sending facility and has only support for IMAP. POP/SMS/MMS are not supported. ■How to connect to an IMAP mail server: To connect an IMAP mail server, just specify your full email address as your login name(username) and the password you log in to your account. If you don't know your login name/password, contact an organization or personnel in charge of the IMAP mail server to get a hostname, user id(name), password. ■Basic operation: * Pull down to Refresh/Long Press to reload&spam filtering * Push up to download older mails at the bottom of message lists *Tap/Swipe to switch accounts Tapping/Swiping the navigation bar of the Mailbox list switches the account if multiple accounts are available. * Tap/Swipe to move around mailboxes (among 'Quick View List') * Move/Delete/Mark mail messages by the toolbar on the navigation bar * Tap/Swipe the navigation bar to turn over mail messages * Add a mail to the blacklist/spam learning data by swiping *Tap a Tab bar to switch the rule view. There are 4 views to show the rules for ‘Sender’, ’Subject’, ‘Message’, ‘Compound’. ■Spam filtering: MailCat generates a spam filter by learning from spam and ham messages in INBOX. Just follow the steps, you can have your own spam filter. 1. Tap 'Edit' button in Monitor. 2. Pick up several mail messages by tapping each table cell. 3. Tap "SPAM" button on the command bar. 4. Likewise pick up mails, and "HAM" button on the command bar. 5. "Pull down to Refresh" or "Long press on the navigation bar" triggers Machine learning, then a spam filter will be generated. 6. Repeat the steps(1-5) until the number of spams and hams reaches about 16. 7. After learning 16 spams and 16 hams, MailCat starts judging which mail is spam or not. 8. Check the filtering result on Monitor. 9. Correct errors and 'Pull down to Refresh" or "Long press( 2sec) on the navigation bar", re-learning starts and your spam filter gets smarter. Repeat the steps(8-9) until no errors are found. ■Mail Rules: There are 4 conditional fields for mail rules --- sender, subject, message, compound. Mail rules are only applied for 'INBOX'. To edit or create a mail rule, tap 'Edit' button on the Mailbox list. The selection menu appears, choose 'Rule'. Mail rules for ‘Sender’ will appear. Tap a Tab bar to switch a view . ■Other usage: Please visit support page. http://www.seimitsusakufu.com/iOS/mailapps/en/support.html ■Support: To get a further support , contact through the following mail address. support_seimitsu@jcom.home.ne.jp

Screenshots

Mail Folders3 screens
MailCat4 screens

Verdict

The call

The clearest difference is review sentiment: Mail Folders at 52% against MailCat's 0%. Mail Folders also leads on rating (1.5 vs 1.0). On price, ratings volume, update cadence and ads 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

Mail Folders costs $3.99 and MailCat $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Mail Folders holds the better App Store score, 1.5 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 52% of Mail Folders's written reviews are positive against 0% of MailCat's.

UpkeepUpdate frequency

Mail Folders ships an update every 5 months, MailCat every 4 months. The most recent releases landed on September 24, 2026 and June 5, 2026 respectively.

Scorecard2 real differences · 8 level
Mail Folders versus MailCat: the parameters behind the verdict, then further details
ParameterMail FoldersMailCat
Price$3.99$3.99
Rating1.5 (2 ratings) — better1.0 (1 ratings)
Positive reviews51.7% of reviews — better0.0% of reviews
Number of ratings2 — better1
Update frequencyEvery 5 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.616.6
Further details — not scored
Size5 MB4 MB
Age rating4+4+
DeveloperTechKnowledgeSeimitsusakufu LLC

Customer experience

Mail Folders

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews58 reviews
Positive51.7%
Neutral17.2%
Negative31.0%

MailCat

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews3 reviews
Positive0.0%
Neutral33.3%
Negative66.7%

In-app purchases

None

Mail Folders

No in-app purchases

None

MailCat

No in-app purchases

Questions

Is Mail Folders free?
Mail Folders costs $3.99, with no in-app purchases.
Is MailCat free?
MailCat costs $3.99, with no in-app purchases.
Which has better reviews, Mail Folders or MailCat?
Mail Folders is rated higher. Mail Folders averages 1.5 out of 5 from 2 ratings, while MailCat averages 1.0 from 1 ratings.
Do Mail Folders or MailCat have ads?
Neither Mail Folders nor MailCat shows ads.
Which is updated more often, Mail Folders or MailCat?
Mail Folders ships an update every 5 months, and MailCat every 4 months. Most recently, Mail Folders was updated on September 24, 2026 and MailCat on June 5, 2026.

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