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The current version of the Box mobile app on iOS currently has 4 stars out of 5. On Android's Google Play it has 4.5 out 5.
The Podio platform by Citrix is one of a handful of enterprise collaboration platforms that has an app store.
Podio has a popular mobile client on iOS (5 out of 5 stars) as well as an Android client (4 out of 5 stars)