Comparison

SpamBlocker vs SaneBox

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

Head to head
About

SpamBlocker

This app helps manage unwanted emails by reassigning spam mailboxes and filtering incoming messages. It uses machine learning and rule-based systems to identify and block junk mail, supporting IMAP/POP3 accounts. It does not have mail sending capabilities.

Highlights
  • Spam/Trash mailbox reassignment
  • Machine learning spam filtering
  • Rule-based filtering (sender, subject)
  • IMAP/POP3 support
  • HTML image blocking
  • Multi-account support
Features
Read full description

■SpamBlocker supports Spam/Trash mailbox’s reassignment. Some (IMAP) mail servers support a machine learning spam filtering by using the mail data in the spam mailbox. If the spam mailbox matches between SpamBlocker and the mail server, SpamBlocker can feedback its spam filtering result to the mail server. Then the spam mail traffic can be reduced. ■SpamBlocker provides a spam filtering feature SpamBlocker(the usage is explained at the online help in the App) can filter out spams(junk mails) from the incoming mail messages by a spam filter which is generated by the SpamBlocker's built-in machine learning engine. SpamBlocker also supports 'rule based' filtering by specifying "sender's mail address" or "subject"'s substring.
 SpamBlocker supports IMAP/POP3 and can access only Inbox, spam box, trash box. SpamBlocker has no mail sending facility. As for the POP3 mail filtering, SpamBlocker has to get started before other mailers, otherwise spams will be downloaded to other mailers because POP3 has no synchronization mechanism . SpamBlocker supports HTML image blocking. SMS/MMS are not supported. SpamBlocker adapts the advertising free application model, but it has no resident toolbar, so the client area with an advertisement banner isn't narrower than other standard iOS applications. 
■Main Features: •Fast machine learning engine optimized for a mobile device ◦Learn ham and spam mail messages to generate a spam filter ◦Spam filtering time is very short compared with mail messages downloading time. ◦Multi-language. In this version, only English and Japanese are supported. 
European languages will be OK if it's based on alphabets. ◦Multi-account ■How to connect to an mail server: To connect an 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 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 the navigation bar to move around mailboxes * Move/Delete/Mark mail messages by the toolbar on the navigation bar * Tap/Swipe the navigation bar to turn over mail messages * Swipe To POP3 server to move back a mail to POP3 server. * Add a mail to the blacklist/spam learning data by swiping a cell ■Spam filtering: SpamBlocker 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, SpamBlocker is ready to start judging which mail is spam or not. Set the spam filter switch on the account setting if you want to start the spamfiltering. 8. Check the filtering result on Monitor. 9. Correct errors and 'Pull down to Refresh" or "Long press on the navigation bar", re-learning starts and your spam filter gets smarter. Repeat the steps(8-9) until no errors are found. ■Spam Rule Filtering: Please don't forget about turning on "Spam Rule switch" at the account setting after setting rules. ■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 ■Copyright: Some of icons in this software are designed by Icons8 (http://icons8.com)

About

SaneBox

This app enhances your email management experience by automatically sorting important messages, hiding distractions, and allowing you to unsubscribe from unwanted emails. It connects to any email service and learns your preferences to declutter your inbox.

Highlights
  • Automatic inbox sorting
  • AI-powered email analysis
  • Distraction filtering
  • One-click unsubscribe
  • Email follow-up reminders
  • Do Not Disturb mode
Features
Read full description

Download and install this optional app to enhance your SaneBox experience. Push notifications let you know when your latest digest is ready, quickly process it directly on your device. *** New to SaneBox? Keeping reading...*** The SaneBox service connects to your email, identifies important messages, hides distractions, has Do Not Disturb, banishes annoying senders, reminds you to followup and more... Start your TWO WEEK FREE TRIAL today! Connects to any email service (Gmail, Office 365, Yahoo, iCloud, etc…). If you know how to use email folders, then you know how to use SaneBox. The unimportant email isn't quarantined like inferior products. It stays in your account, SaneBox just moves it out of your Inbox to a server folder. You can continue to use any email client or webmail interface because they are just folders on your email server. WHEN YOU CONNECT YOUR EMAIL • SaneBox folders are added everywhere you check your email. • Your Inbox email is then sorted: • Important email arrives and stays in your Inbox. • Distractions arrive and are moved to your SaneLater folder. • Check your Inbox and SaneBox folders with any webmail/email client. • During onboarding you’ll have the opportunity to try our other award winning features and folders. • Connect additional email accounts. HOW DOES SANEBOX KNOW? • We've been keeping email sane since 2010. • Our AI will analyze your email history and learn what is important to you. • Teach us by moving any misplaced email to the correct folder with any webmail/email client. WHY SANEBOX? • Sort and declutter your Inbox automatically • Schedule breaks from new email with Do Not Disturb • Unsubscribe from unwanted emails with 1-click • Snooze non-urgent email for later • Track and get notified when someone hasn't replied • Free access to Inbox Zero Academy DIGITAL SUBSCRIPTION OPTIONS • Snack - one email account and one optional extra for $6.99 per month or $58.99 per year (save over 35%). Cancel any time. • Lunch - two email accounts and five optional extra for $11.99 per month or $98.99 per year (save over 30%). Cancel any time. • Dinner - four email accounts and all optional extras for $35.99 per month or $299.99 per year (save over 30%). Cancel any time. Your payment will be charged to your iTunes account at confirmation of purchase. Your subscription will automatically renew each month or year 24-hours before the end of the current period, and your credit card will be charged through your iTunes account unless auto-renew is turned off at least 24-hours before the end of the current period. You can turn off auto-renew at any time from your iTunes account settings. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. PRIVACY POLICY There's an old saying, "If you're not paying for a product, then you are the product". You are our customer - not our product. We will never sell your data, show you ads or breach your trust. Your privacy and security is our top priority. https://www.sanebox.com/privacy TERMS OF SERVICE https://www.sanebox.com/tos Questions Concerns? Please contact us at support@sanebox.com. We respond to every inquiry. * Prices shown are in U.S. dollars. Other restrictions apply.

Screenshots

SpamBlocker4 screens
SaneBox4 screens

Verdict

The call

The clearest difference is rating: SaneBox at 4.6 against SpamBlocker's 2.8. SaneBox also leads on review sentiment (61% vs 21%) and ratings volume (652 vs 6). SpamBlocker's advantage is monetization model (free vs freemium). On price, 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

Both are free to download. SpamBlocker sells 1 one-off in-app purchase and SaneBox sells 10 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

SaneBox holds the better App Store score, 4.6 against 2.8. That said, the two scores are not equally well evidenced: SaneBox has 652 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 21% of SpamBlocker's written reviews are positive against 61% of SaneBox's.

UpkeepUpdate frequency

SpamBlocker ships an update every 3 months, SaneBox every 3 weeks. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

Scorecard5 real differences · 5 level
SpamBlocker versus SaneBox: the parameters behind the verdict, then further details
ParameterSpamBlockerSaneBox
PriceFreeFree
Rating2.8 (6 ratings)4.6 (652 ratings) — better
Positive reviews21.0% of reviews61.3% of reviews — better
Number of ratings6652 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.616.0 — better
Further details — not scored
Size7 MB18 MB
Age rating4+4+
DeveloperSeimitsusakufu LLCSaneBox

Customer experience

SpamBlocker

All ratings6 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews62 reviews
Positive21.0%
Neutral6.5%
Negative72.6%

SaneBox

All ratings652 ratings
Positive90.0%
Neutral5.4%
Negative4.6%
Written reviews62 reviews
Positive61.3%
Neutral6.5%
Negative32.3%

Bugs and requests

SpamBlocker

Not enough reviews yet to summarise bugs or requests.

SaneBox

Reported bugs

3 issues
  • Emails disappearing or getting redirected
  • Folders and settings not working as expected
  • Aggressive marketing and difficulty unsubscribing

Requested features

3 requests
  • More transparent and customizable email sorting
  • Improved integration with email clients
  • Better mobile experience

In-app purchases

1 purchases

SpamBlocker

One-time1
  • Remove Ad&Limitation$0.99
10 purchases

SaneBox

Subscriptions10
  • Monthly Snack - Legacy$6.991 Month
  • Monthly Snack$6.991 Month
  • Monthly Lunch - Legacy$11.991 Month
Show 7 more
  • Monthly Lunch$11.991 Month
  • Monthly Dinner$35.991 Month
  • Yearly Snack - Legacy$58.991 Year
  • Yearly Snack$58.991 Year
  • Yearly Lunch - Legacy$98.991 Year
  • Yearly Lunch$98.991 Year
  • Yearly Dinner$299.991 Year

Questions

Is SpamBlocker free?
SpamBlocker is free to download, with in-app purchases available.
Is SaneBox free?
SaneBox is free to download, with in-app purchases available.
Which has better reviews, SpamBlocker or SaneBox?
SaneBox is rated higher. SpamBlocker averages 2.8 out of 5 from 6 ratings, while SaneBox averages 4.6 from 652 ratings.
Do SpamBlocker or SaneBox have ads?
Neither SpamBlocker nor SaneBox shows ads.
Which is updated more often, SpamBlocker or SaneBox?
SpamBlocker ships an update every 3 months, and SaneBox every 3 weeks. Most recently, SpamBlocker was updated on November 1, 2026 and SaneBox on November 7, 2026.

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