Serial 7s is made and published by HFX Lab. AppBrain is an independent app data site and isn't affiliated with HFX Lab. The app name, icon, screenshots and description belong to HFX Lab and are shown as published on the App Store.
AppBrain's verdict
- Rating on App Store
- 5.00
- 1 ratings
- Last updated
- September 21, 2026
- Size
- 42.4 MB
It doesn't have enough ratings yet to judge what users think.
User feedback
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Store listing
By HFX Lab, from the App Store
Description by HFX Lab Written by the developer, not by AppBrain. Click to read.
Inspired by the classic "Serial 7s" task—a standard component of the Mini-Mental State Examination (MMSE)—this game gives a proven cognitive test a fresh twist.
Starting with a randomly generated number between 99 and 105, your total time to complete 14 consecutive subtractions of 7 is measured.
Serial subtraction by 7 is widely used to evaluate focus, attention span, and working memory. Regular practice can help sharpen your mind and boost cognitive fitness.
Recommended for anyone interested in brain training, keeping their mind active, or supporting long-term cognitive health and dementia prevention.
Safety and technology
Found in the app by AppBrain- Price
- Free
- App size
- 42.4 MB
- Content rating
- Low
Technologies used by Serial 7s
Releases
Updates seen on the App Store- Version
- 1.1.0
- Launched
- April 2024
No changelog data
Alternatives
Similar apps and more from HFX Lab
Rankings
App Store top chartsApp Store Rankings for Serial 7s
About the app and developer
About Serial 7s
Serial 7s is a games app developed by HFX Lab.
What is the rating of Serial 7s?
Serial 7s is rated 5.00 out of 5 stars, based on one rating ratings.
Is Serial 7s free?
Serial 7s is free. The app size is 42.39 MB. The latest version available is 1.1.0. The last update was on September 21, 2026.
What are the requirements for Serial 7s?
The app has a content rating of Low Maturity. The app has been available on the App Store since April 2024.
Developer information for HFX Lab
Address:
Frequently asked questions about Serial 7s
Is Serial 7s free?
Yes. Serial 7s is free on the App Store.
Is Serial 7s still available?
Yes. Serial 7s is on the App Store, and the last update we saw was on September 21, 2026.
How large is Serial 7s?
Serial 7s is 42.39 MB.
Is Serial 7s suitable for children?
App Store gives Serial 7s a low maturity rating, so it is meant for older children and up.
How do people rate Serial 7s?
Serial 7s has one rating of 5.00 stars on the App Store.
Who made Serial 7s?
Serial 7s was developed by HFX Lab. It is listed in the games category on the App Store.
What are the best alternatives to Serial 7s?
People looking at Serial 7s also look at these games apps: Swiftie Swipe, Schulte Table - Speed Reading., WORD TOWER - Fun word puzzle, Fast Math: Brain Training, Hideaways -Spot the difference.