January 2020 MAU
According to RTrack analytics, Roblox hit 119M+ MAU in January of 2020. In December, RTrack data showed a MAU of 113M+ users in the 30 days preceding December 31st 2019. Data recorded by RTrack in January, measuring the 30 days before January 31st, shows a monthly active user count of roughly 119,355,918 user accounts, an increase of more than 6 million on the previous month. Shown below is data from an August 2019 Business Insider article  and RTrack’s most recent data.
This hints at strong user growth for Roblox in terms of monthly active users, with a large jump in players. There also evidence of improved retention of users; January’s data shows that 8.3% of the randomly sampled group (totalling 80,200 users) were online in the past month, compared with 8.24% of users in December 2019 (same sample size).
RTrack’s value for January 2020 MAU is an estimate based on a randomly selected sample of 80,200 Roblox accounts.
RTrack does not make any claims as to the validity or accuracy of the values shown in this blog post, and is not associated with Roblox Corp. These values are not official Roblox figures and were not released by Roblox Corp.
 “Roblox has eclipsed Minecraft with 100 million users — highlighting the popularity of ‘digital hangouts'” As of 12th January 2020: https://www.businessinsider.com/roblox-user-growth-surpasses-minecraft-2019-8?r=US&IR=T