UPSnut Pro 4+‎

UPSnut Pro can be used to retrieve UPS status information, like battery charge level, battery voltage, time on battery and so on, from a NUT (Network UPS Tools) or an APC UPS Daemon (apcupsd) server that has an UPS (Uninterruptible Power Supply) hooked up to it.

Features:
- App supports the latest NUT server / APCUPSD and is compatible with all iPhone running iOS 13 or higher.
- IP/Hostname/Domain of server to connect to can be changed at any time in Settings page.
- Dark mode is supported

Requirements:
- Any UPS compatible with NUT or APCUPSD
- Server - this can be any device that can host the NUT / APCUPSD service (Note: you can not run the server on an iPhone, the phone is just the client. You can use an embedded device, such as a Raspberry Pi)
- your phone

For information regarding set up of the NUT server, please check the project's site: https://networkupstools.org
And for information regarding set up of the APCUPSD server, please check the project's site: https://apcupsd.org

Support:
UPSnut Pro (the iOS app) is a fully compatible, but unofficial client developed to allow your device to connect to NUT / APCUPSD servers.
No support will be provided for bugs in NUT server or in APCUPSD, but only for bugs related to this iOS app.