Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: I'll Be Back: On the Multiple Lives of Users of a Mobile Activity
  Tracking Application   Mobile health applications that track activities, such as exercise, sleep,
and diet, are becoming widely used. While these activity tracking applications
have the potential to improve our health, user engagement and retention are
critical factors for their success. However, long-term user engagement patterns
in real-world activity tracking applications are not yet well understood. Here
we study user engagement patterns within a mobile physical activity tracking
application consisting of 115 million logged activities taken by over a million
users over 31 months. Specifically, we show that over 75% of users return and
re-engage with the application after prolonged periods of inactivity, no matter
the duration of the inactivity. We find a surprising result that the
re-engagement usage patterns resemble those of the start of the initial
engagement period, rather than being a simple continuation of the end of the
initial engagement period. This evidence points to a conceptual model of
multiple lives of user engagement, extending the prevalent single life view of
user activity. We demonstrate that these multiple lives occur because the users
have a variety of different primary intents or goals for using the app. We find
evidence for users being more likely to stop using the app once they achieved
their primary intent or goal (e.g., weight loss). However, these users might
return once their original intent resurfaces (e.g., wanting to lose newly
gained weight). Based on insights developed in this work, including a marker of
improved primary intent performance, our prediction models achieve 71% ROC AUC.
Overall, our research has implications for modeling user re-engagement in
health activity tracking applications and has consequences for how
notifications, recommendations as well as gamification can be used to increase
engagement.

25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
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The categories of this paper are: chem-ph