Train your memory and focus,one minute at a time.

RecallBloom is a free iPhone brain training app centered on Dual N-Back. It combines standard 20-round sets, Brain Score, daily missions, graphs, statistics, and a calendar so you can practice with visual positions and sounds and review your in-app progress over time.

RecallBloom is designed for adults looking for a short memory-and-focus exercise, people who want to try Dual N-Back for the first time, and users who prefer to keep a record of their practice. It is not intended for medical diagnosis or treatment.

Dual N-Back is a working-memory task in which you track two streams—typically a visual position and a sound—and decide whether each current stimulus matches the one shown N rounds earlier.

Each round shows a position on a 3×3 grid and plays a sound. You answer Yes or No for position and sound separately, based on whether each one matches the stimulus from N rounds earlier. At N1, you compare with the immediately preceding round.

Working memory is the limited mental workspace used to actively hold and update information for a short time while you think, decide, or complete a task. Conversation, mental math, reading, and multi-step instructions all use working memory.

RecallBloom uses Dual N-Back because it provides one consistent task for holding, updating, and comparing visual and audio information. The app offers this as memory-and-focus practice and does not promise a specific medical or cognitive outcome.

RecallBloom focuses on standard Dual N-Back instead of offering a large catalog of unrelated mini-games. Its key differences are short 20-round sets, a clear daily mission, Brain Score, and progress records organized as graphs, statistics, and a calendar.

Brain Score is RecallBloom's 0–999 in-app indicator of recent, stable performance in standard Dual N-Back sets. It updates gradually and is intended to help you review your own in-app trend over time.

No. Brain Score is not IQ, brain age, a medical test, a diagnosis, or a measure of everyday ability. It is based only on results from standard Dual N-Back sets completed inside RecallBloom.

Yes. RecallBloom is free to download and use on iPhone. You can start the app's Dual N-Back training at no cost.

A standard set contains 20 rounds, and the active play portion takes about one minute. Setup and result review add a little extra time, but the experience is designed for a short break.

No. The daily mission is a prompt that makes it easier to start, not a requirement. You can use RecallBloom at a frequency that fits your schedule and comfort level.

Yes. The standard experience begins at N1, where you compare each position and sound with the immediately preceding round. You answer using clear Yes and No controls, and there is no need to start at a higher N level.

The current RecallBloom experience is designed for adults. If a child uses the app, a parent or guardian should review the task and make sure the pace and difficulty are appropriate.

The official site currently describes the iPhone version. An Android release date has not been announced. Check future official updates for platform availability.

The current design stores training history and Brain Score primarily on the device and does not provide direct cloud synchronization between multiple devices.

Yes for the standard Dual N-Back mode, because the task uses visual position and sound at the same time. Headphones can be helpful in shared or noisy spaces.

The N level tells you how many rounds back to compare. N1 means one round earlier, N2 means two rounds earlier, and so on. A higher N requires you to keep and update more previous position and sound information.

The graph shows Brain Score trends, statistics summarize items such as total sets and N level, and the calendar lets you review sessions by date. Together they provide several ways to revisit your training history.

Research has examined Dual N-Back and working-memory training, but RecallBloom does not guarantee improvements in working memory, focus, IQ, school or work performance, or everyday functioning. The app provides the task and records your in-app performance.

Standard training does not require you to enter your name, health information, or an estimated IQ. Refer to the app's published privacy policy for the final details about data handling.