Data study · 252,554 Google Play apps · August 3, 2026
The Downloads-per-Rating Study 2026
How many downloads does one rating represent? We measured it across 252,554 Google Play apps — one snapshot, taken August 3, 2026 — and the median answer is one rating per ~155 installs. But the honest answer is that there is no single number: the ratio runs from 76 installs per rating in Casino to 472 in Educational games, paid apps collect a rating every ~32 installs, and apps under 10,000 installs every ~30. Anyone converting rating counts to downloads with one universal multiplier is off by up to 6× on category alone.
Why Google Play: it is the only store that publishes install counts, so the installs-to-ratings relationship can actually be measured there — every figure on this page is a direct measurement of public store data, not a modeled estimate. The ratio is lifetime: total installs (bracket floor) divided by total ratings. Median throughout; floors of 1,000 installs and 100 ratings per app. The full 47-category table is free as a CSV — delivered by email.
The headline findings
Five things the data says
- There is no universal ratio. The store-wide median is one rating per 155 installs, but the middle half of apps ranges from 73 to 318 — before you even split by category. Any single "downloads = ratings × N" rule of thumb is a guess dressed up as a constant.
- Category moves the ratio 6.2×. Educational games take a median 472 installs to earn one rating and Racing 361 — their players are kids, and kids don't rate. Casino sits at 76 and Finance at 89 — money on the line turns users into raters.
- Paying is the strongest rating trigger we measured. Paid apps collect one rating per ~32 installs; free ad-supported apps need ~198. People who spent money upfront rate about six times more often per install.
- Score and rating velocity rise together. Apps rated 4.5★+ earn a rating every ~92 installs; apps under 3.5★ every ~270. The likely mechanism is the rating prompt — apps that ask at the right moment get more ratings and better ones.
- Small apps break the table. Under 10,000 installs the median is one rating per just 30 installs — early ratings are heavily solicited (friends, communities, prompt-on-first-open). The ratio only stabilizes near ~200 in the 100K–10M range.
The core table
Installs per rating across 47 categories
The category you build in sets how often your users rate — before you make a single product decision. The extremes tell the story: audiences that are children (Educational, Racing) almost never rate, while audiences with money or stakes involved (Casino, Finance, Card) rate constantly. The chart shows the eight highest and eight lowest categories; the table below carries all 47.
| Category | Apps measured | Median installs per rating |
|---|---|---|
| Educational (game category) | 3,555 | 472 |
| Racing | 2,206 | 361 |
| Music (game category) | 710 | 252 |
| Simulation | 8,724 | 246 |
| Photography | 5,110 | 237 |
| Beauty | 522 | 230 |
| Art & Design | 2,244 | 215 |
| Casual | 8,936 | 206 |
| Action | 5,050 | 206 |
| Video Players & Editors | 2,739 | 200 |
| Tools | 25,164 | 199 |
| Entertainment | 14,167 | 199 |
| Arcade | 3,884 | 197 |
| Communication | 4,203 | 179 |
| Events | 334 | 169 |
| Business | 6,448 | 163 |
| Personalization | 13,277 | 159 |
| Maps & Navigation | 2,783 | 157 |
| Travel & Local | 4,454 | 156 |
| Productivity | 9,296 | 155 |
| Sports | 5,665 | 151 |
| Social | 3,456 | 151 |
| Education | 15,873 | 150 |
| Trivia | 1,250 | 148 |
| Medical | 2,399 | 142 |
| Dating | 1,106 | 141 |
| Parenting | 655 | 140 |
| Music & Audio | 10,878 | 139 |
| House & Home | 977 | 138 |
| Board | 2,570 | 137 |
| Auto & Vehicles | 1,522 | 133 |
| Shopping | 5,013 | 131 |
| Books & Reference | 9,444 | 131 |
| Lifestyle | 8,918 | 124 |
| Strategy | 3,560 | 124 |
| Health & Fitness | 7,334 | 123 |
| Puzzle | 11,175 | 122 |
| Libraries & Demo | 335 | 120 |
| News & Magazines | 3,264 | 115 |
| Role Playing | 5,109 | 107 |
| Food & Drink | 3,055 | 107 |
| Adventure | 4,502 | 99 |
| Weather | 1,412 | 99 |
| Word | 1,879 | 97 |
| Card | 2,809 | 96 |
| Finance | 12,995 | 89 |
| Casino | 1,294 | 76 |
Source: GetAppNiche, August 3, 2026 snapshot; 252,554 Google Play apps with ≥1,000 installs and ≥100 ratings; categories with ≥300 qualifying apps. Naming caveat: Google Play has both an Educational and a Music game category (marked above) — distinct from the Education and Music & Audio app categories. For what a "good" score looks like once those ratings arrive, see what is a good app rating.
Why one multiplier fails
The ratio depends on how big the app already is
The installs-per-rating ratio is not a constant over an app's life. Tiny apps run on solicited ratings — friends, launch communities, a prompt on first open — so they show one rating per just 30 installs. As real distribution takes over, the ratio climbs and settles around ~200 for apps between 100K and 10M installs, then dips to ~170 for the 10M+ giants, whose install bases include years of pre-prompt history and re-installs.
| Lifetime installs | Apps measured | Median installs per rating |
|---|---|---|
| 1K – 10K installs | 11,019 | 30 |
| 10K – 100K installs | 81,835 | 127 |
| 100K – 1M installs | 99,113 | 200 |
| 1M – 10M installs | 47,374 | 199 |
| 10M+ installs | 13,213 | 170 |
Source: GetAppNiche, August 3, 2026 snapshot. Practical consequence: for apps under ~10K installs, a rating count tells you almost nothing about downloads — solicited ratings swamp the signal. The category table above is most reliable in the 100K–10M range, where the medians are stable. For how many downloads actually count as traction, see how many downloads is good.
Run the numbers on a real niche
The per-app view behind these aggregates
This study is the market-wide average. GetAppNiche gives you the per-app view across 3.6M+ apps on the App Store and Google Play — estimated downloads and revenue, rating and review dynamics, keyword difficulty — so you can size a specific competitor instead of reasoning from a market median.
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Monetization changes who rates
Paid users rate six times more often
Split the same 252,554 apps by monetization model and the biggest behavioral gap in this study appears: people who paid upfront leave a rating every ~32 installs, while users of free ad-supported apps need ~198 installs per rating. Skin in the game makes people talk. A second, quieter pattern: within both free and freemium apps, the ad-supported variant runs a higher ratio than the ad-free one — ads correlate with more passive, lower-intent audiences that rate less per install.
| Monetization | Apps measured | Median installs per rating |
|---|---|---|
| Free, with ads | 83,101 | 198 |
| Freemium (IAP), with ads | 73,400 | 152 |
| Free, no ads | 64,727 | 145 |
| Freemium (IAP), no ads | 24,379 | 116 |
| Paid upfront, no ads | 6,383 | 32 |
| Paid upfront, with ads | 475 | 31 |
Source: GetAppNiche, August 3, 2026 snapshot. Practical consequence for competitive research: a paid app's rating count implies far fewer downloads than a free app's identical count. For how the pricing models themselves are distributed (on the Apple side), see the iOS App Pricing Study 2026.
The prompt effect
Better-rated apps also collect ratings faster
You might expect angry users to rate more. At market scale, the opposite shows up: apps rated 4.5★+ collect one rating per ~92 installs, while apps under 3.5★ need ~270 — nearly a 3× gap, monotonic across the bands. The likeliest mechanism isn't that happiness makes people chatty; it's the in-app rating prompt. Apps that ask for a rating at the right moment harvest more ratings and steer happy users to the store — volume and score rise together. The teams that never ask get rated only by the users with the strongest (often negative) motivation.
| App's star rating | Apps measured | Median installs per rating |
|---|---|---|
| Under 3.5★ | 44,024 | 270 |
| 3.5★ – 4.0★ | 42,849 | 236 |
| 4.0★ – 4.5★ | 85,258 | 149 |
| 4.5★ – 5.0★ | 80,423 | 92 |
Source: GetAppNiche, August 3, 2026 snapshot. Correlation at market scale, not a causal experiment — but the practical takeaway holds either way: if you never prompt, your rating count and your score are both being set by your angriest users.
Using the table
Turning a rating count into a download ballpark
The honest recipe: take a competitor's total rating count, multiply by the median installs-per-rating of its category, and read the result as a lifetime order-of-magnitude — not a precise figure. Two worked examples from the August 3, 2026 table:
- A Finance app with 4,000 ratings: 4,000 × 89 ≈ ~356,000 lifetime installs — consistent with a store listing showing "100,000+" or "500,000+".
- An Educational game with the same 4,000 ratings: 4,000 × 472 ≈ ~1.9M lifetime installs. Same rating count, roughly five times the audience — this is why the category column matters more than the store-wide 155.
Know the failure modes before you lean on it: it breaks below ~10K installs (solicited ratings), it under-counts apps that never prompt, and it's a lifetime figure — it says nothing about whether those downloads happened last month or in 2019. For judging current momentum, recent rating velocity beats lifetime totals; that's the approach we describe in how to estimate app downloads.
Methodology
How these numbers were made
- Universe: every Google Play app in our tracked catalog (2.5M+ Google Play apps) that clears the floors — ≥1,000 lifetime installs, ≥100 ratings, and a store category. 252,554 apps qualified; latest snapshot row per app, taken August 3, 2026.
- The metric: lifetime installs ÷ lifetime rating count, computed per app, then aggregated as the median (interpolated percentile) — never the mean, which the long tail would drag upward.
- Install counts are bracket floors. Google Play reports installs as brackets ("500,000+"); we use the bracket floor, so each app's true ratio is equal to or somewhat higher than measured. Medians across thousands of apps smooth this quantization but don't remove it — treat the table as conservative.
- Ratings, not written reviews. The denominator is the total star-rating count, which includes ratings without text. Written-review counts are far smaller and would produce much larger ratios.
- Floors and drops: below 1,000 installs or 100 ratings the ratio is dominated by noise and solicited ratings, so those apps are excluded; categories with fewer than 300 qualifying apps are dropped, leaving 47.
- Scope: Google Play, worldwide install and rating totals, August 3, 2026 snapshot; the underlying dataset updates daily. Apple publishes no install counts, so an equivalent direct measurement doesn't exist for the App Store — treat cross-store transfers of these numbers as directional only.
Picking what to build before you size competitors? Start from the free app niche finder or the State of iOS App Niches 2026 study, then use this table to sanity-check any download claim you meet along the way.
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All 47 categories — apps measured and median installs per rating, plus the store-wide row — as a CSV from the August 3, 2026 snapshot. Free; we'll send it to your inbox, and cite it anywhere with a link back. You'll also join the Monday drop of 10 iOS niches worth building in — unsubscribe anytime.
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Downloads per rating — quick answers
How many downloads does one app rating represent?
Across 252,554 Google Play apps with at least 1,000 installs and 100 ratings (snapshot August 3, 2026), the median app shows one rating per roughly 155 installs. The middle half of the store falls between 73 and 318 installs per rating, and category medians run from 76 (Casino) to 472 (Educational) — so use your category's number, not the store-wide one.
How do I estimate an app's downloads from its rating count?
Multiply the app's total rating count by the median installs-per-rating for its category in the table above. Treat the result as a lifetime, order-of-magnitude ballpark — Google Play reports installs as bracket floors, rating-prompt behavior varies app by app, and apps under 10,000 installs run far below the category medians.
Do paid apps get rated more often than free apps?
Per install, dramatically so. Paid apps show one rating per roughly 32 installs, versus about 198 installs per rating for free ad-supported apps — people who paid upfront leave ratings around six times more often per install (August 3, 2026 snapshot).
Why do highly rated apps collect ratings faster?
Apps rated 4.5★ and above show one rating per ~92 installs, while apps under 3.5★ need ~270 installs per rating. The likeliest driver is the in-app rating prompt: apps that ask at the right moment collect more ratings and better ones at the same time, so score and rating velocity rise together rather than independently.
Does the installs-per-rating ratio apply to the Apple App Store too?
The measurement itself is Google Play only, because Google Play is the only store that publishes install counts. The category pattern — which audiences rate readily and which don't — plausibly carries across stores, but the absolute numbers should not be copied 1:1 to iOS.
Can I download the data?
Yes — free. Leave your email in the form at the end of this page and we'll send the full 47-category CSV: apps measured and median installs per rating, from the August 3, 2026 snapshot. Requesting the file also adds you to our Monday niche-report list — unsubscribe anytime.