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Last updated on: 2026-08-17
Android Apps > Educational > Serial 7
Serial 7 icon

Serial 7

1.0.4
HFX Lab
0.00
0 reviews
100+
Downloads
Free

Serial sevens - Descending subtraction test.

Serial 7 Screenshot 1 of 5
Serial 7 Screenshot 2 of 5
Serial 7 Screenshot 3 of 5
Serial 7 Screenshot 4 of 5
Serial 7 Screenshot 5 of 5
iOS version

About Serial 7

Serial 7 is an educational app developed by HFX Lab.

Download Statistics

Serial 7 has been downloaded 200 times. In the last 30 days, the app was downloaded 3 times.

User Ratings

The app has no ratings yet.

App Information

Serial 7 is FREE to download. The APK download size is 4.92 MB. The latest version available is 1.0.4. The last update was on July 3, 2025.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play April 2024.

Description
Serial 7 is a game that tests how quickly you can subtract 7 in a row from a given number.

It is a slight variation of the serial 7 subtraction test, which is one of the items on the MMSE(Mini-Mental State Examination).
A starting number between 94 and 100 is randomly selected, and you measure the time it takes until you can't subtract any more 7.

The subtraction of consecutive sevens task is used to test attention and memory, and consistent testing can help improve brain skills such as attention and memory.
It can also help prevent cognitive decline that occurs with everyday activities and reduce the likelihood of developing dementia.
They can also be used to see how an individual's cognition changes over time.

Recommended for users interested in brain health and training, and dementia prevention.
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More data about Serial 7

Price Free to download
Total downloads 200
Recent downloads 3
Rating No ratings
Ranking Not ranked
Version 1.0.4
APK size 4.92 MB
Number of libraries ?
Suitable for Everyone
Ads Contains ads

App Performance Report

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Common keywords of similar apps

Serial Subtraction Sevens Subtract Test Number Time Attention Memory Brain Dementia

Keywords missing from this app

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Downloads over time

Downloads over time
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Serial 7 has been downloaded 200 times. Over the past 30 days, it has been downloaded 3 times.

Changelog of Serial 7

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Developer information for HFX Lab

HFX Lab

hyodi@hfx.kr

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Google Play Rankings for Serial 7

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Technologies used by Serial 7

12 permissions
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