When comparing Yappy vs AirDroid, the Slant community recommends AirDroid for most people. In the question“What are the best alternatives to Pushbullet?” AirDroid is ranked 2nd while Yappy is ranked 10th. The most important reason people chose AirDroid is:
As of 23/11/2015, the price for Pushbullet Pro is $39.99 yearly/$4.99 monthly while AirDroid Premium is only $19.99 yearly/$1.99 monthly/$38.99 biennially.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Solid SMS service
Never had a failure.
Pro Simple
'Just works'. Very smooth setup.
Pro Premium is cheaper than Pushbullet Pro
As of 23/11/2015, the price for Pushbullet Pro is $39.99 yearly/$4.99 monthly while AirDroid Premium is only $19.99 yearly/$1.99 monthly/$38.99 biennially.
Pro It's a Swiss Army knife of cross-device functionality
In addition to SMS management and notification mirroring, it includes the ability to transfer files, URLs and clipboard, view through the camera lens of the Android device on another device, and completely control all functionality of a rooted Android device on a different device.
Pro Straightforward SMS manager
In addition to allowing you to send and see incoming messages using an intuitive interface on a computer, the app also allows you to manage contacts.
Pro Supports cross-device notification mirroring
SMS and app notifications as well as incoming call notifications are mirrored on the connected devices.
Cons
Con Messages take too long to arrive to the recipient
Message appears to have gone through, but in reality they don't arrive to the recipient device for another 5 or 10 mins.
Con Shaky notification mirroring
Using the Chrome extension, it's a bit hit and miss.
Con Considerable delay when sending SMS messages via computer
Messages sent via computer can sometimes be delivered to the recipient with a delay of up to 10 minutes. Because of that holding a conversation might be difficult and it can needlessly drag out.
Con No MMS Support
src/org/kde/kdeconnect/Helpers/TelephonyHelper.java