ABOUT THE CHARTS
ARIA Charts
The ARIA Charts are the main Australian music sales charts issued weekly by the Australian Recording Industry Association. The charts record the highest-selling songs and albums of various genres in Australia based on data collected from a combination of physical and digital retailers as well as music-streaming services. The weekly ARIA Charts are released on Apple Music and Spotify every Saturday at 5 p.m. AEST.
Website: ariacharts.com.au 
Billboard Charts
The Billboard charts are regional and international charts that record sales, streams, and airplay to rank the popularity of songs, albums, and artists on a weekly basis (monitored on a Friday-to-Thursday cycle). There are many different charts dedicated to various categories, genres, and regions; and the sales from the United States contribute considerably to these charts.
Billboard also has a chart quite unrelated to music consumption, titled as the Social 50 chart, which ranks the artists with the most engagements on social networking sites; an artist’s popularity is determined by a formula blending their weekly addition of friends, fans, and followers along with their artist page views and weekly song play, measured by Next Big Sound.
Website: billboard.com/charts
Gaon Music Chart
The Gaon Music Chart is a South Korean music chart that is split into Gaon Album Chart and Gaon Digital Chart. The Gaon Album Chart records physical album shipments, which are the numbers of copies shipped to stores (both domestically and abroad) excluding the returns. As a result, the numbers on the Gaon Album Chart will usually appear higher than those on other charts. The Gaon Digital Chart ranks the best-selling digital music sales, combining downloads, streaming, and background music (a mode of musical performance in which the music is not intended to be a primary focus of potential listeners).
Website: gaonchart.co.kr
HANTEO Chart
The HANTEO Chart is a South Korean music chart designed to rank real-time physical album sales, recording information obtained from a selected number of Hanteo-certified stores that report their sales for each artist on a daily basis. It does not reflect total sales but gives a general idea of how an album is performing; as a result, the numbers from the HANTEO Chart will not be as high as those on other charts.
Website: m.hanteochart.com
iTunes
iTunes is a media player, library, and internet radio broadcaster developed by Apple Inc., available on both iOS and Windows devices. Purchasing, organizing, and playing multimedia content can be done through the application. iTunes charts differ by country and regions, and are separated into Top Songs and Top Albums as determined by in-app sales.
MelOn
MelOn is a South Korean music store and streaming platform run by KaKao Corp. MelOn Chart provides a service that has daily, weekly, and monthly charts based on streams and downloads on the app.
Website: m2.melon.com/index.htm
National Syndicate of Phonographic Publishing
The National Syndicate of Phonographic Publishing (SNEP) is a regional chart in France. Their responsibilities include collecting and distributing royalty payments for broadcasts and performances, preventing copyright infringement of its members’ works (including music piracy), and sales certification of silver, gold, platinum, and diamond records and videos. Additionally, it compiles official charts of France’s top-selling music on a weekly basis by gathering data from physical album sales, digital downloads, and streams.
Website: snepmusique.com
Oricon Charts
Oricon charts are Japanese charts that record weekly sales of CDs, DVDs, video games, and entertainment content in several other formats in Japan; purchases outside of the country are not counted. The Oricon Singles Chart is the Japanese music industry-standard singles popularity chart issued daily, weekly, monthly, and yearly by Oricon. Chart rankings are based only on physical sales; download sales are not included.
Website: oricon.co.jp
Official Charts
The Official Charts are the only regional charts in the United Kingdom which rank the popularity of music on a weekly basis. These charts are compiled by recording physical sales, digital downloads, and streams.
Website: officialcharts.com
Official Deutsche Charts
Deutsche Charts is Germany’s official charts, split into a singles chart and an albums chart, which are compiled by GfK Entertainment on behalf of the Bundesverband Musikindustrie (German Music Industry). These charts of various categories rank the popularity of songs, albums, and artists based on sales, and provide streaming data as well.
Website: offiziellecharts.de/charts
Spotify Charts
Spotify Technology S.A. is a Swedish media services provider and music streaming service available worldwide in around 80 countries, with Europe and North America being the biggest markets. Spotify charts, based on platform streams, are separated into Top 200 Charts and Viral 50 Charts, which are different for each country and region that it is available in.
Website: spotifycharts.com