Zabbix alert (checker(client))?

Question

Zabbix

Those who grew up from Nagios or those who have been using Zabbix for a long time, please, tell me an analogue of the Nagstamon 2.0 (1.0.1) utility or how to properly weld it to Zabbix (3.0).
I stupidly cannot understand people who use mail, Jaber, ICQ and other crap for notification. Just spamming mail (jaber) + add. the cost of deleting emails.
A kind of checker should:
1. Show the problem (list of problems). Actually, as is customary in Nagstamon
2. In the case of a fix, delete it yourself or leave the alert hanging. All
3. At the same time, all this did not need a hanging browser.

Answer 1

In practice, we use the option "spam to other crap" in the form of a slack channel. Messages about each problem come 2 times, the first time when it broke, the second time when it was fixed.
I tried a couple of applications (android), including paid ones, with the same goal, they do not want to work in the background.