HIIT 4x4
HIIT 4x4 is made and published by Eastridge Technology. AppBrain is an independent app data site and isn't affiliated with Eastridge Technology. The app name, icon, screenshots and description belong to Eastridge Technology and are shown as published on the App Store.
AppBrain's verdict
Established- Rating on App Store
- 1.00
- 1 ratings
- Last updated
- June 26, 2026
It doesn't have enough ratings yet to judge what users think.
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Releases
Updates seen on the App Store- Version
- 1.09
- Launched
- February 2019
No changelog data
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Technology
Found in the app by AppBrain- Price
- $9.99
- App size
- 2.02 MB
- Content rating
- Medium
Technologies used by HIIT 4x4
About the app and developer
About HIIT 4x4
HIIT 4x4 is a health & fitness app developed by Eastridge Technology.
User Ratings
HIIT 4x4 is rated 1.00 out of 5 stars. The rating is based on one rating ratings.
App Information
HIIT 4x4 costs $9.99. The app size is 2.02 MB. The latest version available is 1.09. The last update was on June 26, 2026.
Technical Requirements
The app has a content rating of Medium Maturity. The app has been available on the App Store since February 2019.
Developer information for Eastridge Technology
Address:
Frequently asked questions about HIIT 4x4
Is HIIT 4x4 free?
No. HIIT 4x4 costs $9.99 on the App Store.
Is HIIT 4x4 still available?
Yes. HIIT 4x4 is on the App Store, and the last update we saw was on June 26, 2026.
How large is HIIT 4x4?
HIIT 4x4 is 2.02 MB.
Is HIIT 4x4 suitable for children?
App Store gives HIIT 4x4 a medium maturity rating, so it is not meant for young children.
How do people rate HIIT 4x4?
HIIT 4x4 has one rating of 1.00 stars on the App Store.
Who made HIIT 4x4?
HIIT 4x4 was developed by Eastridge Technology. It is listed in the health & fitness category on the App Store.
What are the best alternatives to HIIT 4x4?
People looking at HIIT 4x4 also look at these health & fitness apps: 3YY - 3 Years Younger, Psychiatric Disorders, My Endorphin, Bike Fast Fit Elite, HR Zones - Target Heart Rate.
Store listing
By Eastridge Technology, from the App Store
Description by Eastridge Technology Written by the developer, not by AppBrain. Click to read.
The HIIT 4x4 intervals are as follows:
- 10 minutes warmup at 60% MHR
- 4 minutes high intensity at 90% MHR
- 3 minutes low intensity at 70% MHR
- repeat high-low intervals 4 times (4 high intensity intervals of 4 minutes each = 4x4).
HIIT 4x4 uses a speedometer type dial to display heart rate. When the arrow is in the green zone then your heart rate is within the interval target. If the heart rate later falls out of the target range, warning chimes are issued until back in range.
Each person's MHR is different, and changes with age. A commonly used formula for MHR is 220 - age in years. A more accurate number can be discovered by using a heart monitor during all out exercise and observing the highest heart rate achieved.
HIIT 4x4 stores your workout history using Apple Health.
HIIT 4x4 is based on the High Intensity Interval Training 4x4 program developed by the Norwegian University of Science and Technology's Cardiac Exercise Group.