90 keywords measured on Google Play US, last scanned 2026-11-03. Figures are read directly from store pages, not estimated.
NEW ENTRANTS · 12 MONTHS
WHAT WINNERS CHARGE
5 of 5 sell in-app purchases, top prices range from 9.99 USD to 199.99 USD.
Real prices, read from each app's own store page, not estimated
| App holding top-5 | Ratings | What it charges | Last update |
|---|---|---|---|
| Sleep Sounds - relaxing sounds | 214,116 | 14.99 USD — IAP $0.99 - $14.99 per item | updated 2026-02-03 |
| Sleep Tracker & Recorder: Yawn | 213,908 | 19.99 USD — IAP $3.99 - $19.99 per item | updated 2026-10-28 |
| Relax Rain: sleep sounds | 171,502 | 9.99 USD — IAP $1.19 - $9.99 per item | updated 2026-10-29 |
| Sleep Sounds | 125,966 | 99.99 USD — IAP $0.49 - $99.99 per item | updated 2026-03-31 |
| Sleep Monitor: Sleep Tracker | 121,373 | 199.99 USD — IAP $0.99 - $199.99 per item | updated 2026-10-21 |
REVENUE CHARTS
Not measured on Google Play. The App Store publishes its category charts as a public feed; this report reads that feed and nothing equivalent on Google Play.
RATING GROWTH
52 of 64 apps are still gaining ratings, a median of 1.79 new ratings a day. 6 gained none in the last 30 days; 6 moved only once.
| App | Released | Ratings now | New ratings per day |
|---|---|---|---|
| Alarmy - Alarm Clock & Sleep | — | 2,186,161 | |
| Sleep Tracker & Sound by Remly | — | 48,880 | |
| Sleep Monitor: Sleep Tracker | 2019 | 121,373 | |
| Pokémon Sleep | — | 136,351 | |
| Calm - Sleep, Meditate, Relax | — | 616,977 |
64 of 128 apps holding a top-10 position have rating readings spanning 14+ days.
Google Play rating counts are worldwide, so these Google Play US figures are not country-specific. App Store counts are kept per country. Compare apps within one store, never across the two. A rate is the rise in rating count over the days observed in the last 30 days; a drop of more than half is read as a counter reset and earlier readings are discarded.
NEIGHBOURING NICHES
1 neighbouring keyword share part of this audience, with a different set of winners.
| Neighbouring keyword | Overlap with this niche | Its own market |
|---|---|---|
| relaxing and meditation | meditation1 of 7 top-10 apps released 6–12 months ago reached 50 ratings |
Keywords whose top-10 shares 10–29% of its apps with this niche: part of the audience, but a different set of winners.
KEYWORDS
None of these 8 keywords has a top-10 app aiming at it.
| Keyword | Difficulty (0–100) | Apps targeting it |
|---|---|---|
| calm sleep sounds | nobody — 0/10 | |
| calming sleep sounds | nobody — 0/10 | |
| peaceful sleep sounds | nobody — 0/10 | |
| relax melodies sleep sounds | nobody — 0/10 | |
| sleepea sleep sounds | nobody — 0/10 | |
| sounds to sleep by | nobody — 0/10 | |
| sleep sounds by sleep pillow | nobody — 0/10 | |
| pink noise sleep sounds | nobody — 0/10 |
82 more keywords in the full report.
Difficulty is the cost of reaching the top, 0–100. "Apps targeting it" counts top-10 apps carrying every word of the keyword in their name or subtitle.
COMPLAINTS
Most common: Crashes & bugs, 167 of 452 classified 1–2★ reviews.
Developers replied to 71% of the 138 complaints where the store shows replies (apps in the top 5: 79%).
Google ranks these by how many people found them helpful, which leans towards complaints — so the shares show which problems dominate, not how many users hit them.
Each 1–2★ complaint was assigned one theme by an AI model. A second AI model re-read 100 random labels in September 2026: about 7 in 10 matched its own pick and 9 in 10 were a reasonable reading. Read the order of the leading themes, not exact shares. Classified on 2026-09-16.
OTHER STORE
See sleep sounds on App Store US → 1 of 24 top-10 apps released 6–12 months ago reached 50 ratings there