User Agent

Mozilla/5.0 (iPhone; CPU iPhone OS 15_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Mobile/15E148 Safari/604.1 (compatible; YandexMobileBot/3.0; +http://yandex.com/bots)

This user agent belongs to Yandex Mobile Bot. Yandex LLC developed this Bot. This Bot run on iOS and it renders web contents with WebKit on iPhone.

Bot - Yandex Mobile Bot

Yandex Mobile Bot

Version	3.0 @ 32 bit
Developer	Yandex LLC
Parent	YandexMobileBot 3.0
Platform	iOs Operating System: iOs apple (32 bit) by Apple Inc
Device Type	Mobile Phone
More info	http://yandex.com/bots

Act as

Mobile	Yes
Tablet	No
Crawler	Yes Bot / Crawler / Spider Any program (such as a robot or spider) that is used to automatically discover and scan websites by following links from one webpage to another.
Fake	No
Anonymized	No

Capabilities

Rendering Engine	WebKit by Apple Inc (For Google Chrome, iOS (including both mobile Safari, WebViews within third-party apps, and web clips), Safari, Arora, Midori, OmniWeb, Shiira, iCab since version 4, Web, SRWare Iron, Rekonq, and in Maxthon 3.)
Pointing	touchscreen
Javascript	Yes
CSS	Yes Version: 3
Cookies	Yes
Tables	Yes

Frames	Yes
IFrames	Yes
Background Sounds	No
Java Applets	Yes
VB Script	No
Activex	No