At least one of the reviewers posted separate 5-star reviews for the paid and free version on the same day.

Edit: And on more careful inspection, they do say that they bought the paid version after liking the free version. I may have jumped the gun on that one.

9 reviews and 1-5 installs.

Not sure how those numbers are generated, but I get the same feeling as you.

Google Play Store hasn't updated the install count since last 48 hours or so. Flurry data is showing about 50 users for paid and about 200 users for lite version (These numbers contain both iOS and Android installs but we are sure that Android downloads are more than 5.

On play store, the ratings and reviews are almost immediately updated but install numbers are not frequently updated. Usually it gets updated once in a day or sometime it takes even more time to update.

I (for one) read through all the reviews and didn't get the feeling that they were fabricated (probably because I personally know 90% of the people and have seen their feedback on other forums (I.e. Facebook).

Having said that, the app. does indeed have some areas for improvement, as enumerated by several folks here. But I think it's an excellent attempt at demystifying some of the recurring programming questions we've all seen (and been stumped on) at one time or another during interviews :)

> probably because I personally know 90% of the people and have seen their feedback on other forums

Hah, no kidding. Fair enough.