Comparison

MailCat vs Non

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

Head to head
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
Features
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

About

Non

Features
Read full description

The PRO version with greatly enhanced functions has appeared in the "Grouping" app that can be easily grouped in various scenes! The following features can be used by using the PRO version. - Entering levels (1 to 9) for each member, groups can now be grouped in such a way that the average value of the levels can be made to be even closer. - Grouping can now be performed while adjusting the above-mentioned level balance and duplicate avoidance weight balance. - You can now clear the member list at once. - The upper limit of the number of groups that can be grouped has been increased to 16. - You can now easily send grouped results by e-mail. - It became possible to save and read member list. This usage is the same as the free version, but the major difference is that you can now input member level. If you enter the number of people per group (*) and the name and level (1 to 9) of the members you want to group, they will be automatically group. ※ If the number of people in the group is the same, enter only that number.(Example: Enter "2" if you want to make some groups of 2 people.) If the number of people in the group is not the same, enter each number separated by a hyphen.(Example: Enter "3-2-1" if you want to make a group of 3 people, 2 people and 1 person.) The slider at the top of the grouping list screen allows you to adjust the weight balance of level equalization and duplication avoidance. By default, the knob is set to the middle, and the level equalization and duplication avoidance weights are 5: 5. You can put weight on level equalization if you move this knob to the right, and you can put weight on duplication avoidance if you put it on the left. If you turn off the "Pro grouping" switch under the slider, you will get a completely random grouping. When you press the E-mail sending button at the bottom of the grouping list screen, the mailer starts with the grouping result written in the text.

Screenshots

MailCat4 screens
Non3 screens

Verdict

The call

The clearest difference is update cadence: MailCat at every 4 months against Non's every 8 months. Non's advantage is price ($1.99 vs $3.99) and iOS requirement (9.0 vs 16.6). On ads, in-app purchases and device support 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

MailCat costs $3.99 and Non $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

MailCat ships an update every 4 months, Non every 8 months. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
MailCat versus Non: the parameters behind the verdict, then further details
ParameterMailCatNon
Price$3.99$1.99 — better
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.69.0 — better
Further details — not scored
Size4 MB8 MB
Age rating4+4+
DeveloperSeimitsusakufu LLCQWERT LLC

In-app purchases

None

MailCat

No in-app purchases

None

Non

No in-app purchases

Questions

Is MailCat free?
MailCat costs $3.99, with no in-app purchases.
Is Non free?
Non costs $1.99, with no in-app purchases.
Do MailCat or Non have ads?
Neither MailCat nor Non shows ads.
Which is updated more often, MailCat or Non?
MailCat ships an update every 4 months, and Non every 8 months. Most recently, MailCat was updated on October 15, 2026 and Non on October 8, 2026.

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