You can wait for fotaz all you want. He didn’t develop metre.at, Roman did.
I own two metre modules, and have tried doing simple renames of extra hm10 i haveBluetooth devices with “AT” serial commands to set the Bluetooth device name to match his “metr-XXX” naming. It won’t do anything even with the same name as another module. The only other option on these HM10s is to pull the Mac address off and use that to lock down connectivity within the application if you dont want people using an app without your module.
If you dont believe me, hook up your hm10 to a FTDI adapter, open the serial console in arduino IDE @ the baud rate of the module, run the AT commands to set the name, AT to set baurdrate (115200) and AT save.
Try all you want, you won’t get anywhere unless you can rewrite the Mac addresses
As well if you look at metre.at on google play you can see the version revision history. Roman publishes a new version almost daily. Anytime a new module is sold a new version is released to accommodate additional mac addresses. You really think he updates the software daily with bug fixes? Doubtful.