Number of Downloads in Google Play

The Google Play Store shows (updated once a day) the number of downloads and device installations. The number you see on Google Play (in web or on their mobile app) is only updated in the following steps:

Downloads in Google Play App (Downloads in Web)

• 1+ (1 - 5)
• 5+ (6 - 10)
• 10+ (11 - 50)
• 50+ (51 - 100)
• 100+ (101 - 500)
• 500+ (501 - 1000)
• 1000+ (1001 - 5000)
• 5000+ (5001 - 10000)
• 10000+ (10001 - 50000)
• 50000+ (50001–100000)
• 100000+ (100001–500000)
• 500000+ (500001–1000000)
• 1000000+ (1000001–5000000)
• 5000000+ (5000001–10000000)
• 10000000+ (10000001–50000000)
• 50000000+ (50000001–100000000)
• 100000000+ (100000001–500000000)
• 500000000+ (500000001–1000000000)
• 1000000000+ (1000000001–5000000000)

So, if your app isn't downloaded often, it will take days or weeks to reach the next level.

As Tano pointed out the number of downloads are just given in categories. These categories are (as of december 2015):

• 1 - 5
• 5 - 10
• 10 - 50
• 50 - 100
• 100 - 500
• 500 - 1.000
• 1.000 - 5.000
• 5.000 - 10.000
• 10.000 - 50.000
• 50.000 - 100.000
• 100.000 - 500.000
• 500.000 - 1.000.000
• 1.000.000 - 5.000.000
• 5.000.000 - 10.000.000
• 10.000.000 - 50.000.000
• 50.000.000 - 100.000.000
• 100.000.000 - 500.000.000
• 500.000.000 - 1.000.000.000
• 1.000.000.000 - 5.000.000.000