ANSWERED
Accepted Solutions
Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
It's great to see you around @SunsetRunner. There isn't an option to silence the vibration at the moment of receiving a call, but you can turn off the calls notifications option by doing the following from your iOS Fitbit app:
1. Tap the tracker's tile
2. Tap Notifications
3. Select the notifications you want to receive
4. Sync
You can also check the Customizable alerts request, vote for it and leave your comment.
I hope this helps, let me know the outcome. 
Best Answer
Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
It's great to see you around @SunsetRunner. There isn't an option to silence the vibration at the moment of receiving a call, but you can turn off the calls notifications option by doing the following from your iOS Fitbit app:
1. Tap the tracker's tile
2. Tap Notifications
3. Select the notifications you want to receive
4. Sync
You can also check the Customizable alerts request, vote for it and leave your comment.
I hope this helps, let me know the outcome.
Best Answer