Add HubNext to your Home Screen — it opens like a regular app and sends you notifications. Nothing to download.
Check: Settings → General → About → iOS Version.
Open this page in Safari — adding to the Home Screen is the most reliable there.
The same login and password as on desktop.
Go to hubnext.cc in Safari and sign in.
It is the button with an arrow pointing up in the bottom (or top) Safari bar. If you cannot see the bar, tap the bottom edge of the screen or scroll the page down.
Scroll the list of actions down. If you cannot find it, scroll to the end, tap Edit Actions and add it.
Keep the name HubNext and tap Add. This switch is what makes notifications possible.
Launch it from the new icon, not from Safari, or the notifications button will not appear. Sign in if asked.
Open Profile → Notifications, tap Turn on notifications and choose Allow in the iPhone prompt. Done!
You opened HubNext in Safari. Close the tab and launch it from the Home Screen icon. If there is no icon, repeat steps 2–4.
Open Settings → Notifications → HubNext and turn on Allow Notifications. Then go back to Profile and tap Turn on notifications.
Check Do Not Disturb and Focus modes: they can hide notifications.
The subscription goes away with the icon. Add HubNext to the Home Screen again and turn notifications on once more.
Link the Telegram bot in Profile → Notifications — events will arrive there too.