Comparison

Encrypted Email vs Layers of Knowledge

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

Head to head
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

About

Layers of Knowledge

Read full description

Transform how you remember information with Layers of Knowledge – the intelligent spaced repetition app built on the science of the Ebbinghaus Forgetting Curve. LEARN SMARTER, NOT HARDER Stop forgetting what you learn. Our scientifically optimized reviewing schedule (1, 3, 7, 14, 30, 90, and 180 days) ensures information moves from short-term to long-term memory through perfectly timed reminders. KEY FEATURES - Layered Learning System Create knowledge items with optional hidden content for self-quizzing. Perfect for flashcard-style learning where you test yourself before seeing the answer. - Smart Notification Scheduling Receive timely reminders exactly when you need to review. Our intelligent system ensures you never miss a critical review session. - Flexible Learning Schedules Choose from multiple preset reviewing systems or create your own custom systems that match your learning goals. Define exactly when you want to be reminded – whether it's days, weeks, or months apart. Each schedule can have unlimited layers tailored to your specific needs. - Pause & Resume Learning Life gets busy. Pause all notifications with a single tap and resume whenever you're ready. Your progress is preserved, and all pending reviews are automatically rescheduled from when you resume. - Relearn Anytime Completed all reviews but need a refresher? The relearn feature lets you restart any item's review cycle from the beginning. Perfect for information that needs reinforcement or topics you want to revisit with fresh eyes. - Powerful Organization Organize your knowledge with color-coded tags. Filter, search, and manage thousands of items effortlessly with our advanced search feature. - Progress Tracking Track your journey from new information to permanent knowledge. See upcoming reminders, review your learning history, and celebrate when items move to your "Learned" collection. - Data Portability Download your entire knowledge base. Import on any device. Transfer between phones seamlessly. Your data belongs to you – always. - Multilingual Support Full support for English, French, and Arabic content including proper right-to-left text handling and diacritics-aware search. ENDLESS LEARNING POSSIBILITIES Vocabulary, inspiring quotes, poetry, historical facts, names and faces, exam material, important dates, travel phrases, trivia for conversations, and more – if you need to remember it, Layers of Knowledge helps you retain it forever. BUILT ON SCIENCE The Ebbinghaus Forgetting Curve shows we forget up to 70% of new information within 24 hours. Layers of Knowledge fights this by prompting reviews at scientifically proven intervals, dramatically improving long-term retention. YOUR LEARNING, YOUR WAY Whether you prefer the default science-backed schedule or want complete control with custom intervals, Layers of Knowledge adapts to your style. Pause when life demands it, relearn when memory fades, and build lasting knowledge layer by layer. Privacy-focused: All your data stays on your device. No account required. No data collection. Start building knowledge corpus today!

Screenshots

Encrypted Email4 screens
Layers of Knowledge4 screens

Verdict

The call

The clearest difference is update cadence: Layers of Knowledge at every 3 days against Encrypted Email's every 2 months. 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Encrypted Email ships an update every 2 months, Layers of Knowledge every 3 days. The most recent releases landed on November 12, 2026 and November 9, 2026 respectively.

Scorecard1 real difference · 9 level
Encrypted Email versus Layers of Knowledge: the parameters behind the verdict, then further details
ParameterEncrypted EmailLayers of Knowledge
PriceFreeFree
Rating3.9 (117 ratings) — better—
Positive reviews41.5% of reviews—
Number of ratings117 — better—
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreemium—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.412.0 — better
Further details — not scored
Size34 MB35 MB
Age rating4+4+
DeveloperContactoffice GroupIsmail Bninou

Bugs and 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

Layers of Knowledge

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Encrypted Email

No in-app purchases

None

Layers of Knowledge

No in-app purchases

Questions

Is Encrypted Email free?
Encrypted Email is free to download, with no in-app purchases.
Is Layers of Knowledge free?
Layers of Knowledge is free to download, with no in-app purchases.
Do Encrypted Email or Layers of Knowledge have ads?
Neither Encrypted Email nor Layers of Knowledge shows ads.
Which is updated more often, Encrypted Email or Layers of Knowledge?
Encrypted Email ships an update every 2 months, and Layers of Knowledge every 3 days. Most recently, Encrypted Email was updated on November 12, 2026 and Layers of Knowledge on November 9, 2026.

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