The problem with streaks is that users can build up a streak for weeks or months just to have it set back to zero in one day. In my experience, this is extremely demotivating and one study on habit formation showed missing one day did not have any affect on forming habits.
That is why tracking streaks is unhelpful in the long term.
Forte is different. Forte calculates a score based on every time you complete, skip, or fail to complete a habit. Failing one day will set your score back a bit, but won't reset it back to zero, giving you the opportunity to quickly get back on track.
At this time, Forte does not display data older than one week. This was done purposefully, along with the decision to not track streaks, to avoid users feeling a sense of defeat if they build up a long streak of incomplete habits. Habit building is about the future, not the past.
Not currently. iCloud sync will be coming in a future update.
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