To determine if you can reply to messages using Google Assistant on the Huawei Watch Ultimate with an iPhone, let's break down the information:
1. Google Assistant on iPhone: Google Assistant can be used on an iPhone through its standalone app. However, it doesn't integrate as seamlessly as Siri, which is built into iOS. For tasks like sending messages, Google Assistant can prompt the Messages app to open, but it doesn't allow direct message sending without opening the app[1].
2. Huawei Watch Ultimate with iPhone: The Huawei Watch Ultimate can be paired with an iPhone using the Huawei Health app. This allows for basic integration such as receiving notifications and controlling some features. However, the extent of message reply functionality is limited, similar to other Huawei watches, where you might be able to use quick replies but not input custom messages directly on the watch[2][3].
3. Google Assistant on Wear OS Watches: Google Assistant is available on Wear OS watches and can be used to send quick responses to messages. However, the Huawei Watch Ultimate does not run Wear OS; it uses Harmony OS, which means Google Assistant is not natively supported on this device[6][8].
Given these points, you cannot use Google Assistant to reply to messages on the Huawei Watch Ultimate with an iPhone because Google Assistant is not supported on this watch, and the watch's native capabilities for message replies are limited to quick responses or emojis, without the ability to input custom messages directly on the watch.
Citations:
[1] https://www.pocket-lint.com/apps/news/google/141093-google-assistant-on-iphone-what-can-it-do-that-siri-can-t/
[2] https://www.youtube.com/watch?v=QJlVtWYct3A
[3] https://www.youtube.com/watch?v=v-CNB_wZK-A
[4] https://www.reddit.com/r/googlehome/comments/17nhd72/how_is_google_home_with_iphones/
[5] https://www.reddit.com/r/HuaweiWatchGT/comments/onjfwi/how_better_is_huawei_watches_compatibility_with/
[6] https://support.google.com/wearos/answer/7314149
[7] https://support.google.com/assistant/answer/7172657?co=GENIE.Platform%3DiOS
[8] https://consumer.huawei.com/uk/wearables/watch-ultimate/