Yes that is correct since May 12 I did need to update my php version it took a while but when I finally get it my phone did not need to download the app again now I see that play on my favor, I did use the app with no problems, I also saw that the sending process was not even aligned with the every minute I configure on my old samsung.
Today sadly 9/2/2018 my cell stop to work better said the app claimed for internet to be able to connect, of course I had WiFi and 4G but looks like something happened a 6 am pacific time.
I was expecting it was a problem with server so I wait patiently until 2 PM, and I asked my son to see the app on his phone Samsung J7 and the app was asking for user and password
I knew that the J7 was not able to configure the asking time to server looking for pending sms's but I thought will be enough for today sending messages every 5 minutes thinking was the default time. But did not work unless we click the manual form in the app or at least having the app on the screen swivel and will update sending sms's as mentioned leaving the status on pending and some times sent.
I did something stupid delete my old version of the app from my old samsung and guess what, I could not download the new version for incompatibility with my phone, I still not sure if my old version will start to work later on the day or tomorrow, but certainly I lost the opportunity to know.
I used https://apkpure.com/es/sms-gateway-api/networked.solutions.sms.gateway.api go get the older version an installed again on my SGH-M919V Samsung Android 4.4.2 not compatible anymore so the option of configure the refresh is not there any more, J7 was not able to do that,
Sep 3 2018 team upload new version since the notification process to send the sms did not work, the new version suppose to ask server every 2 min not working on my J7 Samsung. so at this point I have to send the messages clicking manually to search on the server for sms pending to send.