Can brain training apps actually improve working memory?
The honest answer: some targeted training produces real but narrow gains. Most commercial brain-training apps make claims well beyond the current evidence. The most important distinction is between task-specific improvement (getting better at the trained task) and transfer (improvement in untrained real-world abilities).
| Intervention | Task improvement | Real-world transfer | Evidence |
|---|---|---|---|
| Dual n-back training | Strong | Moderate | Mixed — some RCTs positive |
| Direct digit span practice | Strong | Weak — narrow | Consistent |
| Aerobic exercise | Moderate | Broad | Very strong |
| Commercial apps (Lumosity) | Strong (on their tests) | Very weak | Weak — FTC sued for false claims |
| Video games (action) | Moderate | Moderate | Strong for RT; moderate for WM |
The most reliable and broadest WM improvement strategy remains aerobic exercise — 150 minutes/week of moderate-intensity cardio produces measurable working memory gains within 6–8 weeks, with effects that persist and generalise. Track your digit span before and after a 6-week exercise programme to measure the effect yourself.
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Quick Answer
Some targeted training (dual n-back, direct digit span practice) produces real but narrow gains. Most commercial brain-training apps show limited transfer to real-world tasks. Aerobic exercise and sleep have broader effects.
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