back number
back number is #72 in Music Free in Japan and charting in 1 of 30 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperFanplus, Inc.
CategoryMusic
PriceFree
Released
Rating★ 4.0 (356)
Version4.7.0
Age rating4+
First seen by us
25 Sep 2026
25 Sep 2026Installs (est.)10k+ worldwide
Rating
4.0 ★
356 ratings
Measured
Best rank now
#72
Music FreeMeasured
back number on the App Store
App details
App ID
1304228982
Publisher
Fanplus, Inc.
On the store since
Mar 2018
8 years on the store
Minimum OS
iOS 15.0+
iPhone 6s and later
Devices
iPhone · iPad
Content rating
4+
Languages
4
EN JA KO ZH
Size
169 MB
Also listed in
Entertainment
back number downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where back number's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Japan | MusicFree | #72 |
Apps near back number on the chart
Music Free, around #72.
Ratings
App Store, worldwide.
Rating
4.0 ★
356 ratings
Measured
Ratings
356
Measured
About back number
This is back number official app.
In this app, you can enjoy various contents such as back number latest information, official fan club "one room" member exclusive movie and member blog.
In this app, you can enjoy various contents such as back number latest information, official fan club "one room" member exclusive movie and member blog.
Latest updates
4.7.0
We have updated some features.
4.6.0
We have updated some features.
