30 Day Back Ext. Challenge!
Not in any tracked top chart right now.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperIntersect
CategoryHealth & Fitness
PriceFree
Released
Rating★ 5.0 (6)
Version8.0.0
Age rating17+
First seen by us
24 Oct 2026
24 Oct 2026Rating
5.0 ★
6 ratings
Measured
30 Day Back Ext. Challenge! on the App Store
App details
App ID
1435562187
Publisher
INTERSECT KK
On the store since
Apr 2020
6 years on the store
Minimum OS
iOS 16.6+
iPhone 8 and later
Devices
iPhone · iPad
Content rating
17+
3 content notes below
Languages
2
EN JA
Size
22 MB
Also listed in
Lifestyle
Content notesInfrequent/Mild Sexual Content and NudityInfrequent/Mild Mature/Suggestive ThemesFrequent/Intense Medical/Treatment Information
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
5.0 ★
6 ratings
Measured
Ratings
6
Measured
About 30 Day Back Ext. Challenge!
Supports Back Extension for 30 day challenge. Main function is to count Back Extension once a day.
Main Function
・Count Back Extension.
・Achievement days management.
・Notifications.
・Record Active Energy and Workouts to Apple Health.
How to use
・Put iPhone on floor.
・Tap screen.
・Keep your face close to iPhone screen. (Upper part) *
・Or count on iPhone screen tap.
Active Energy
・Ex. METs 3.5, Weight 50 kg, Time 10 min. (3.5 - 1) x 50 x (10 / 60) x 1.05 = 21.86 kcal.
Optional permission requests
・Apple Health: It is used to record data in Apple Health.
・Tracking: It is used to deliver personalized ads to you.
・Notifications: It is used to sending notifications.
Languages
・Japanese, English.
*Dynamic Island devices not supported
Main Function
・Count Back Extension.
・Achievement days management.
・Notifications.
・Record Active Energy and Workouts to Apple Health.
How to use
・Put iPhone on floor.
・Tap screen.
・Keep your face close to iPhone screen. (Upper part) *
・Or count on iPhone screen tap.
Active Energy
・Ex. METs 3.5, Weight 50 kg, Time 10 min. (3.5 - 1) x 50 x (10 / 60) x 1.05 = 21.86 kcal.
Optional permission requests
・Apple Health: It is used to record data in Apple Health.
・Tracking: It is used to deliver personalized ads to you.
・Notifications: It is used to sending notifications.
Languages
・Japanese, English.
*Dynamic Island devices not supported
Latest updates
8.0.0
Minor bug fixes.
