We don't support a Safari version of Momentum right now, we have plans to release an official version of Momentum on Safari in the near future though. If you'd like us to notify you when we've released Momentum on Safari — send us a message.
Already using a version of Momentum on Safari?
Two years ago we released a port of Momentum on Safari, but we haven't released any new updates to it since. If you're using this version it will have some annoying bugs and it will also be missing a number of new features. For the best Momentum experience we suggest that you avoid using this outdated version.