When comparing Aqua Mail vs ProtonMail, the Slant community recommends Aqua Mail for most people. In the question“What are the best e-mail clients for Android? ” Aqua Mail is ranked 4th while ProtonMail is ranked 7th. The most important reason people chose Aqua Mail is:
Has been rated well on [AndroidForums](http://androidforums.com/threads/email-which-apps-keep-it-private.935578).
Ranked in these QuestionsQuestion Ranking
Pro Top rated for keeping your info private
Has been rated well on AndroidForums.
Pro Ultra fast and intuitive
The app refreshes emails in seconds and has an intuitive menu. You can do a lot with one or two swipes.
Pro Integrates with cloud storage services for backup and restore
It's possible to backup the app along with account settings via services like Dropbox, OneDrive, Box.com, Google Drive.
Pro Integrates with Tasker
Tasker is an automation app. Aqua Mail's Tasker integration allows changing settings, triggering message based events and running mail checks based on criteria like time of day, location, timer, connection type, etc.
Pro Pro version often goes on sale
The developer usually gives a 25%-50% discount every few months or so on Google Play.
Pro Privacy respecting
User data is protected by strict privacy laws because all servers are located in Switzerland.
Pro Built-in end-to-end encryption
Pro Open Source
Pro No personal information needed
To create an account you don't need to give any personal information, just choose username, domain, and password. Even the recovery email address is optional.
Pro Mobile apps
Apps for Android and iOS available.
Pro Overly Expensive for Desktop Support
Con Floating ads in free version
It shows floating ads in the email list and they can not be deleted.
Con Limited signature capabilities
Signatures can't have images or HTML.
Con Does not support pgp or metacert
Con Free version supports only 2 accounts and adds promotional email signature
The base, free application supports up to two accounts and adds a promo signature to all outgoing messages.
Con No support for Exchange Activesync protocol
This is the de facto, secure Exchange over the web protocol used and is enforced by most businesses for enterprise email. Aqua only supports EWS for Exchange, which most enterprise administrators block or disable.
Con Still lacks some useful features
At the moment, there is no calendar feature and contact management is quite poor. They will, however, start to work on it.
Con Ties to US Investors
ProtonMail takes money from US Investors
Con No IMAP and SMTP support for basic accounts
Basic accounts are restricted to the Protonmail web client. Support for IMAP and SMTP is available with a paid subscription only, and as such with basic accounts it is not possible to send and receive email with external applications.
Con Overly Expensive for Desktop Support
Con Requires phone number for login
If you sign up over Tor or a VPN, it will require email or phone number verification. Email verification is disabled if you use an email that isn't from Google or Outlook.
Con Encryption Keys are stored server-side
The keys are generated during account creation. Using your existing keys is prohibited and ProtonMail must store and control the private keys. Encryption cannot be secure unless the user controls the private keys.