App Intel

Dual N-Back | ADHD Focus Brain

LiveHiromi Fujita2 apps · 108.3K installsEducationFree · contains adsIn-app purchases: $1.99 per itemcom.hiromifujita.dnb_android

Science-based brain training for focus, memory, IQ, and working memory.

Alert me★ WatchOpen in Play ↗
Total installs
7,367
exact · Play shows 5,000+
Installs / day
0
7-day avg · last day 0
Rating
—★
— ratings · — reviews
Released
20 May 2025
1.4y ago
Last update
11 Sept 2026
v2.1.1 · 1mo ago
Countries
—
not checked yet

Install history

exact counter from Google Play
7.2K7.9K8.6K9.3K10K11 Oct12 Oct13 Oct
7.2K7.9K8.6K9.3K10K11 Oct12 Oct13 Oct

Installs per day · last 90 days

00.30.50.8112 Oct13 Oct13 Oct

Change timeline

Full history

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Manifest analysis reads only the required APK ranges. Base APK downloads may need separate device splits to install.

Data safety

declared by the developer on Google Play
  • No data shared with third parties
  • Collects data App info and performance and Device or other IDs
  • Data is encrypted in transit
  • No way to ask for data deletion

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

Permissions

4 in 1 group
0 Sensitive1 Notable3 Routine
OtherNotable4

Access to miscellaneous device features that don't fit other categories

  • Keep your phone's processor or screen from going to sleep, which can use more batteryprevent device from sleeping · WAKE_LOCK
  • Check whether you are online and whether you use Wi-Fi or mobile dataview network connections · ACCESS_NETWORK_STATE
  • Connect to the internet to load content and send datafull network access · INTERNET
  • Check with Google Play that you got this app legitimatelyGoogle Play license check · com.android.vending.CHECK_LICENSE

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Full description
■ Build Core Brain Skills with Dual N-Back Dual N-Back is a brain training game built on a scientific approach that challenges working memory, memory, focus, attention, and thinking skills. Easy to play in short daily sessions, it helps strengthen mental speed, information processing, and sustained concentration through consistent practice. “Struggling to stay focused?” “Want a better memory?” “Looking for a smarter use of spare time?” This is a simple yet deep training experience designed for exactly that. It is a great fit for students and professionals who want better performance, as well as people with ADHD tendencies who want to build stronger focus habits and keep up a daily brain-training routine. ■ Recommended for • People who want to improve focus • People who want to strengthen memory and working memory • People who want to train IQ, thinking skills, and attention • People who want to improve study or work efficiency • People who want to make brain training a daily habit • People with ADHD tendencies who want to practice focusing • People who want serious brain training in short sessions ■ What is Dual N-Back Dual N-Back is a training game based on a scientific approach that can help strengthen the following brain skills. • IQ • Flash memory (instant recall) • Improved cognitive function • Working memory • Focus • Attention ■ Basic Rules • Memorize the panels as they appear in order. • Tap the button that matches the same element shown N steps earlier. • Press the location button if the position matches, and the letter button if the letter matches. • This mode continues until you run out of the set number of lives. • Solve more problems and train your IQ, flash memory, and focus. ■ App Features • Adjustable difficulty from N-2 to N-5 lets beginners and advanced players train at the right level. • Check statistics such as accuracy, reaction time, and play count to measure your progress. • Review your daily training history in a calendar view and track your consistency at a glance. • See growth over time in graphs, making changes in memory and focus easy to visualize. • A level-up system helps you stay motivated and turns training into a fun daily habit. • A clean, distraction-free interface helps you stay immersed in training. • A serious Dual N-Back brain training app for anyone looking for memory training and focus training. • Train working memory, memory, attention, focus, and thinking skills in one brain workout. • Ideal for people who want to improve IQ-related skills and support cognitive performance with science-based brain training. • Short sessions make it easy to use before studying or work as a quick focus warm-up. • A daily memory game for anyone who struggles to stay focused, gets distracted easily, or worries about forgetfulness. • A simple focus training app that can help people with ADHD tendencies build concentration habits and practice consistency. • One app for memory training, working memory improvement, attention training, and cognitive skill exercises. • A great choice for anyone looking for a brain game, thinking game, or educational training app. • Check stats like reaction time and accuracy while visualizing performance and tracking growth. • Calendar-based training logs help you manage habits, study routines, and self-improvement goals. • Graphs make it easier to see changes in focus, memory, and training results over time. • A level-up system adds motivation and makes brain training feel rewarding and fun. • Great for adding brain games, memory games, and thinking exercises to your daily routine. • Useful for students who want better study efficiency, professionals who want better focus, and anyone who wants daily brain exercise. • Dual N-Back trains working memory and attentional control by making you remember and judge at the same time. • A cognitive brain training app designed for steady practice in short spare moments.

What's new

- Fixed minor bugs - We will continue improving the app to make it easier to use

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