Memory Improvement — Kindle Category Opportunity
Competition snapshot for the Self-Help best-seller list, ease-of-entry score 41.0/100.
Category metrics
Score
41.0
Median reviews
891.5
Weak share (top 20)
20%
Median price
$8.99
Median star rating
4.5
Books scanned
50
Worth writing in?
Memory Improvement is between the extremes: 20% of the top 20 is under 100 reviews against a median of 891.5, so entry depends on the specific sub-genre and your launch strength. Read the breakout books below before judging. Ease-of-entry score 41.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 15 | Active Revision: The Forgetting Curve, Fibonacci Sequence, and How to Layer Your Learning (Layered Learning) | — | 0 | $2.99 |
High-frequency phrases in this category's titles
Mine all categoriesHigh-frequency phrases mined from the 50 best-seller titles on this category's list. The ease-of-entry score tells you how winnable the category is; these title phrases tell you which words readers search with — use the two layers together. Frequency is a title statistic, not a search-volume estimate.
| Phrase | Titles | Rank-weighted score |
|---|---|---|
| new skills | 2 | 44 |
| language fast | 2 | 43 |
| proper care and feeding | 2 | 43 |
Sign in and click any phrase to send it straight to the keyword competition lookup.
More Self-Help categories
Check the keywords before you write
Category scores show where entry is easiest; keyword lookups show whether readers actually reach for it. A free account includes keyword competition lookups plus unlimited category scans.
After you publish: why aren't readers buying?
Category research picks the direction; review diagnosis reads the readers. The same platform clusters a book's critical reviews into severity-ranked root causes, each anchored to verbatim quotes — see it applied to a full narrative-history title.
Keep researching with the free tools
Research snapshot scanned on Oct 19, 2026. Refreshed periodically — not live tracking.