Can you set the app up to receive motion alert notifications to more than one smartphone?

Yes! Ipcamtalk's forums is the defacto forum for blue iris users. Please refer questions on that great piece of software there, but I assure you, the software is so feature packed that it'll do what you need

Questions & Answers: Amcrest UltraHD 4K (8MP) Outdoor Bullet Security IP POE Camera, 98ft NightVision, 2.8mm Lens, IP67 Weatherproof, 256GB MicroSD Recording, Black (IP8M-2496EB-V2)

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Amcrest UltraHD 4K (8MP) Outdoor Bullet Security IP POE Camera, 98ft NightVision, 2.8mm Lens, IP67 Weatherproof, 256GB MicroSD Recording, Black (IP8M-2496EB-V2)

EXPERIENCE ULTRA HD 4K 4K (8MP / 3840x2160) resolution featuring low light capability utilizing the latest Sony Starvis image sensor & Ambarella S3LM chipset.
SMARTER SECURITY Receive motion alert notifications & review footage via your smartphone w/the Amcrest View app. Works w/Amcrest Cloud remote video storage, MicroSd card, Amcrest NVRs, Synology & QNAP NAS, FTP, Pale Moon & Sea Monkey Browsers, IE, Safari, Firefox 49.0 & Chrome with Amcrest Web View Extension.
DAY OR NIGHT, RAIN OR SHINE This Camera features a heavy-duty metal weatherproof IP67 housing as well as built-in IR LEDs & a Sony Starvis 1/2.5 8MP progressive image sensor.
SECURE CLOUD VIDEO BACKUP The optional Amcrest Cloud video storage subscription service allows you to store your videos off-site in a 3rd-party location. The footage will be safely recorded in a secure off-site location & accessible to you through a web-based Flash interface for PC (Chrome/Firefox/Safari/Edge) & AmcrestCloud smartphone app.

$89^.99 –