When comparing Signal vs Business Calendar 2, the Slant community recommends Signal for most people. In the question“What are the most useful Android phone apps?” Signal is ranked 3rd while Business Calendar 2 is ranked 34th. The most important reason people chose Signal is:
Signal uses an advanced end to end encryption protocol that provides privacy for every message every time.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Provides security and privacy
Signal uses an advanced end to end encryption protocol that provides privacy for every message every time.
Pro Free and open source
Signal is free and open source software, enabling anyone to verify its security by auditing the code. It's the only private messenger that uses open source, peer-reviewed cryptographic protocols to keep your messages safe.
Pro Supports encrypted group chats
Pro Has a desktop app
Signal Desktop can be used on multiple devices and has most features of the Android version, although it still requires you to register with your phone.
Pro Supports sharing of various different media types
Signal supports: emoji, pictures, videos, audio, contacts, any location and GIF.
Pro Note to Self feature
Allows you to "send: messages to yourself and sync to desktop so you can use Signal as a kind of encrypted Pushbullet alternative
Pro You can easily view all media exchanged
You can easily view all media shared in the chat without scrolling back to when it was shared.
Pro Annonymous Sender (Encrypted)
The sender credentials can be encrypted with the rest of the message, leaving only the recipient address readable by the Signal server. Even if Signal wanted they couldn't see who is talking with who by this mean.
Pro Works everywhere in every country
Unlike most messenger apps, Signal works reliably in all countries by securely circumventing internet censorship.
Pro Recommended by Edward Snowden
Edward Snowden uses this messenger and recommends it to everyone who is concerned about his privacy.
Pro Responsive support
Developer provides prompt and understanding support with problems raised/questions asked.
Pro Multiple Calendar + Multiple Task functionality
Allows you to manage multiple calendars and multiple task (Google) accounts with ease.
Pro Multiple flexible widgets
Allows you to customise the look/feel of the widget, even after it has been created. Show different calendar/task accounts per widget.
Pro Advanced scheduling options
Every 2 weeks, then edit four weeks in for 'This and following instances' etc., perfect with Google Calendar.
Cons
Con Needs access to your phone number and contacts to work
Con Single device
Signal can only be registered to one mobile device at a time. But you can link Signal to Signal Desktop.
Con Servers hosted in the US
A security risk due to National Security letters, which require giving up data to the US state, and making it illegal to disclose that.
Con Unreliable notifications
Sometimes messages won't be received if the Signal app has been closed for a long time or hasn't been opened after booting the device.
Con Trackers!
Con Unskippable Ads
Users are forced to sit through a timer window every day before the ads will skip (for that day). Stupidly poor idea for a "Business" focused calendar app.
Con Isn't multi-platform
No option to manage from PC, it would be cool if there was multi-platform for this app as website, Windows App, Mac OS, etc.