Survivor!.io Downloads & RevenueSurvivor!.io · App Store & Google Play
Survivor!.io gets 5k+ downloads a day worldwide (AppInsider estimate, November 2026, rounded down to a band).
Survivor!.io by HABBY is on App Store and Google Play. Active Users (MAU & DAU), Downloads, rankings, keywords, revenue, and rating totals.
Full timeline · 88 events
- 🌟Survivor!.io featured by AppleiOSgames · ID, MY, PH, TH
- 🌟Survivor!.io featured by AppleiOSgames · ID, MY, PH, TH
- 🌟Survivor!.io featured by AppleiOSgames · ID, MY, PH, TH
- 🌟Survivor!.io featured by AppleiOSgames · ID, MY, PH, TH
- 🌟Survivor!.io featured by AppleiOSgames · ID, MY, PH, TH
- 🎉Survivor!.io in-app event: Snack Pinball! Yummy!iOSSPECIAL EVENT · until 9 Nov
- ✏️Survivor!.io added hidden keywords: にゃんこ大戦争, フォートナイト, ブロスタ, ドラクエiOSwords in the App Store's hidden keyword field (found by probing search)
- 🔎Survivor!.io reached Top 10 for “survival”iOS#9 in France search · popularity 73
- 🌟Survivor!.io featured by AppleiOSgames · ID, MY, PH, TH
- 🌟Survivor!.io featured by AppleiOSgames · ID, MY, PH, TH
- 🌟Survivor!.io featured by AppleiOSgames · ID, MY, PH, TH
- 🌟Survivor!.io featured by AppleiOSgames · ID, MY, PH, TH
- ✏️Survivor!.io added hidden keywords: 魔法, defenseiOSwords in the App Store's hidden keyword field (found by probing search)
- 🎉Survivor!.io in-app event: Halloween Night: Castle Cards!iOSSPECIAL EVENT · until 3 Nov
- 🎉Survivor!.io in-app event: Matrix Squad is live!iOSMAJOR UPDATE · until 28 Nov
- 📈Survivor!.io entered the top 100AndroidTop Free · Adventure · SE
- 📈Survivor!.io charting in a new countryAndroidSweden
- 📈Survivor!.io entered the top 100AndroidTop Grossing · Adventure · NL
- 📊Survivor!.io: downloads up ×2.5 in a weekiOSabout 3.7k a day now (our estimate)
- ✏️Survivor!.io added hidden keywords: vtuberiOSwords in the App Store's hidden keyword field (found by probing search)
- 📈Survivor!.io entered the top 10AndroidTop Free · Adventure · TW
- 📈Survivor!.io entered the top 10iOSTop Free · Action · KR
- 📈Survivor!.io entered the top 100AndroidTop Grossing · Adventure · ES
- 📦Survivor!.io updated to version 5.3.1iOS- Added Chapters 351-355 and their challenge chapters.
- New Survivor progression feature – Matrix Squad coming soon.
- Added Castle Cards, Surprise Chain Packs and other events.
- Elaine and Venato Halloween outfits coming soon.… more - 📈Survivor!.io entered the top 10AndroidTop Grossing · Adventure · MX
- 🎉Survivor!.io in-app event: Beach Treasure Hunt!iOSSPECIAL EVENT · until 27 Oct
- ✏️Survivor!.io added hidden keywords: 音ゲー, roguelikeiOSwords in the App Store's hidden keyword field (found by probing search)
- 📦Survivor!.io updated to version 5.3.1Android- Added Chapters 351-355 and their challenge chapters.
- New Survivor progression feature – Matrix Squad coming soon.
- Added Castle Cards, Surprise Chain Packs and other events.
- Elaine and Venato Halloween outfits coming soon.… more - 🔎Survivor!.io reached #1 for “survival”Android#1 in United States search · popularity 30
- ✏️Survivor!.io: new iPad screenshotsiOS· 6 countries
- ✏️Survivor!.io: new screenshotsiOS5 screenshots (was 5) · 6 countries
- ✏️Survivor!.io: new iconiOS
→
· 9 countries - ✏️Survivor!.io: new iPad screenshotsiOS· FR
- ✏️Survivor!.io: new screenshotsiOS5 screenshots (was 5) · FR
- ✏️Survivor!.io: new iPad screenshotsiOS· DE
- ✏️Survivor!.io: new screenshotsiOS5 screenshots (was 5) · DE
- ✏️Survivor!.io: new iPad screenshotsiOS· BR
- ✏️Survivor!.io: new screenshotsiOS5 screenshots (was 5) · BR
- 📈Survivor!.io entered the top 100 in 2 chartsAndroidTop Free · Adventure · ES · Top Grossing · Adventure · IN
- 📈Survivor!.io charting in a new countryAndroidIndia
- 🎉Survivor!.io in-app event: Time Puzzle is live!iOSSPECIAL EVENT · until 22 Oct
- ✏️Survivor!.io: new iPad screenshotsiOS· US, SA
- ✏️Survivor!.io: new screenshotsiOS5 screenshots (was 5) · US, SA
- ✏️Survivor!.io: new iconiOS
→
· 5 countries - ✏️Survivor!.io: new iPad screenshotsiOS· KR
- ✏️Survivor!.io: new screenshotsiOS5 screenshots (was 5) · KR
- ✏️Survivor!.io: new iPad screenshotsiOS· JP
- ✏️Survivor!.io: new screenshotsiOS5 screenshots (was 5) · JP
- ✏️Survivor!.io: new iPad screenshotsiOS· IT
- ✏️Survivor!.io: new screenshotsiOS5 screenshots (was 5) · IT
- 📦Survivor!.io updated to version 5.3.0iOSNuovi contenuti:
- Aggiunti i Capitoli 351-355 e i relativi capitoli di sfida.
- Nuova funzione di progressione dei Sopravvissuti - Squadra Matrix in arrivo.
- Aggiunte Carte del castello, Pacchetti a catena a sorpresa e altri eventi.
- Abiti di Halloween di Elaine e Venato in arrivo.
Ottimizzazioni:
- Aggiornato il limite di piani del Percorso delle prove.
- Nuova stagione di Eco di Ender attiva, con condizioni aggiornate e ottimizzate.
- Nuova stagione dell'Operazione di zona attiva!… more - ✏️Survivor!.io: new iconAndroid
→
· US
- 🔎Survivor!.io reached Top 10 for “kingdom rush” in 2 countriesiOSSpain, Sweden search · popularity 65
- ✏️Survivor!.io: new iconAndroid
→
· US
- 📦Survivor!.io updated to version 5.3.0Android- Added Chapters 351-355 and their challenge chapters.
- New Survivor progression feature – Matrix Squad coming soon.
- Added Castle Cards, Surprise Chain Packs and other events.
- Elaine and Venato Halloween outfits coming soon.… more - 🔎Survivor!.io reached Top 10 for “kingdom rush” in 2 countriesiOSSouth Korea, Mexico search · popularity 65
- 📈Survivor!.io entered the top 100AndroidTop Free · Adventure · NL
- 📈Survivor!.io charting in a new countryAndroidNetherlands
- 📈Survivor!.io charting in a new country in 5 chartsAndroidSpain · Mexico · Thailand · Turkey · +1 more
- 📈Survivor!.io entered the top 100 in 4 chartsAndroidTop Grossing · Adventure · MX · Top Grossing · Adventure · TR · Top Free · Adventure · TW · Top Grossing · Adventure · TW
- 🎉Survivor!.io in-app event: Autumn Seabed ExplorationiOSSPECIAL EVENT · until 15 Oct
- 📈Survivor!.io entered the top 100AndroidTop Free · Adventure · IT
- 📈Survivor!.io entered the top 10AndroidTop Free · Adventure · KR
- 🎉Survivor!.io in-app event: Commence the Theater Gala!iOSSPECIAL EVENT · until 9 Oct
- 📈Survivor!.io entered the top 10iOSTop Grossing · Action · IN
- 🌟Survivor!.io featured by Apple: “UNSERE LIEBLINGS-APPS”iOStoday · DE, ES, FR, GB, ID, IT, KR, NL, SE, TH
- 🌟Survivor!.io: featuring lifted it to #57 (from outside the chart)iOSDie Favoriten der Redaktion · DE
- 🌟Survivor!.io featured by Apple: “UNSERE LIEBLINGS-APPS”iOStoday · DE, ES, FR, GB, ID, IT, KR, NL, SE, TH, US
- 📈Survivor!.io entered the top 10AndroidTop Grossing · Adventure · KR
- 🎉Survivor!.io in-app event: Cloud Tower is here!iOSSPECIAL EVENT · until 4 Oct
- 🌟Survivor!.io featured by Apple: “UNSERE LIEBLINGS-APPS”iOStoday · DE, ES, FR, GB, ID, IT, KR, NL, SE, TH, US
- 🌟Survivor!.io featured by Apple: “UNSERE LIEBLINGS-APPS”iOStoday · DE, ES, FR, GB, ID, IT, KR, NL, SE, TH, US
- 🔎Survivor!.io reached #1 for “survival”Android#1 in Japan search · popularity 33
- 🌟Survivor!.io featured by Apple: “GAMES WE LOVE”iOStoday · DE, ES, GB, ID, IT, KR, NL, SE, TH, US
- 📈Survivor!.io entered the top 100AndroidTop Free · Adventure · FR
- 🌟Survivor!.io featured by Apple: “GAMES WE LOVE”iOStoday · ID, KR, TH, US
- 🆕Survivor!.io first spotted by AppInsiderAndroidJapan
- 🆕Survivor!.io first spotted by AppInsideriOS#34 in Top Grossing · Action · United Kingdom
- 🌟Survivor!.io featured by Apple: “GAMES WE LOVE”iOStoday · ID, KR, US
- 🎉Survivor!.io in-app event: Elaine takes the stage!iOSMAJOR UPDATE · until 24 Oct
- 🎉Survivor!.io in-app event: Goldfall Coast Carnival Start!iOSSPECIAL EVENT · until 28 Sep
- 🎉Survivor!.io in-app event: Loki Arrives at HQiOSMAJOR UPDATE · until 28 Sep
- 📦Survivor!.io version 5.2.0iOSNo release notes
- 📦Survivor!.io version 5.2.0Android- Added Chapters 346-350 and their challenge chapters.
- New SP Survivor – Loki joins the fight!
- New S Grade Survivor – Elaine joins the fight!
- Survivor Synergy Lv. 100 coming soon.
- New clan event – Tidemyst Haven coming soon!
- Added Cloud Tower, Autumn Seabed Exploration and other events!… more - 🆕Survivor!.io released on the App StoreiOS
- 🆕Survivor!.io released on Google PlayAndroid
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Survivor!.io at a glance
AI summary written from our chart and store data. It can be wrong: check the numbers above.
Roguelite Cartoon 3D Modern short sessions IAP Ads
#zombie #survival #action #one-handed #horde #casual
App Store
App details
Google Play
App details
Tech stack
Trackers and permissions of build v5.3.0, from the εxodus privacy report (CC BY-SA).
Survivor!.io downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| App Store | 1k+ | 10M+ |
| Google Play | 1k+ | 50M+ Measured |
| Total | 5k+ Confidence | 50M+ Confidence |
How this is calculated
Where Survivor!.io's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
In-app revenue
Worldwide, what users spend before Apple and Google take their fee.
| Store | Per day | Per month | Share |
|---|---|---|---|
| App Store | |||
| Google Play | |||
| Total | Confidence | 100% |
Business model: In-app purchase-led
How Survivor!.io makes money: subscriptions, one-off purchases and ads.
Top in-app purchases · App Store US, most popular first
| 1 | Chapter Pack 1 | |
| 2 | Month Card 2 subscription | |
| 3 | Some Gems | |
| 4 | Chapter Pack 2 | |
| 5 | Pile of Gems | |
| 6 | Chapter Pack 3 | |
| 7 | Growth Fund | |
| 8 | Daily Pack 2 | |
| 9 | Small Piggy Bank | |
| 10 | Daily Pack 1 |
Where it ranks now
Both stores, across every country we track.
| Store | Best rank | Charting in | US Top Free | US Top Grossing |
|---|---|---|---|---|
| App Store | #16 | 13 of 30 countries | #153 | #39 |
| Google Play | #11 | 19 of 23 countries | #45 | #17 |
Full chart lists: App Store · Google Play.
Review momentum
ⓘ How we measure thisGrowing fastest in
United Kingdom ▲ +120% ·
France ▲ +86%
New ratings by country (11)
| Country | New ratings a week | Share | Last 2 weeks vs the 2 before |
|---|---|---|---|
| 88 | 41% | ▼ -39% | |
| 84 | 39% | ▼ -30% | |
| 12 | 5% | steady | |
| 6.5 | 3% | ▼ -25% | |
| 6.5 | 3% | ▼ -53% | |
| 6 | 3% | steady | |
| 4.5 | 2% | ▲ +86% | |
| 3.5 | 2% | ▲ +120% | |
| 2.8 | 1% | ▼ -14% | |
| 1.8 | 1% | – | |
| 1.2 | 1% | – |
App Store ratings in the countries we track, 4-week average.
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 4.7 ★ | 245k |
| Google Play | 4.5 ★ | 1.1M 63k written reviews |
| Both stores | 4.5 ★ weighted by ratings | 1.4M |
What users say about Survivor!.io
From the 131 most recent App Store reviews in the US.
Mixed but leaning positive (73% of recent reviews give 4–5 stars). People like it for being fun, and its features and content. The main complaints are about ads, and price and subscriptions. Recent reviews are more negative than earlier ones.
What people like
- Fun: “This game is so addicting”
- Features & content: “To many levels but I like the challenge”
- Ads: “And I’ve had a total of about 4 ads”
- Ease of use: “I love this game at first it seemed hard and then once I learned how to play it so easy”
Common complaints
- Ads: “Ads are ruining the experience”
- Price & subscription: “Let’s you pay to not play it”
- Crashes & bugs: “The game keeps on glitching and I don't like it what it's doing😭😭😭😭😭😭😠😡😡😡😡😡😡😡😡😡🤬🤬🤬🤬🤬”
- Features & content: “An option to exit never appears no matter how long I wait”
About Survivor!.io
Awakened by the trial of dreams, you've no choice but to take on the heroic mantle of saving the city!
As a human warrior with unlimited potential, you and other survivors will have to pick up your weapons and battle these evil and dangerous zombies!
The horde far outnumbers you - any slip-up and you'll get caught in dire straits!
Faced with crisis, you must find a way to survive!
Features:
-Face off against 1000+ monsters at once and exterminate them!
-Clear the map with one-hand controls!
-All-new roguelite skill experience with unlimited combinations
-Feel the heat of each new stage with different difficulties
FaceBook:@Survivor.io
Contact Us: [email protected]
Survivor!.io App Store
Survivor!.io gets 5k+ downloads a day worldwide (AppInsider estimate, November 2026, rounded down to a band).
Survivor!.io is #39 in Games › Action Grossing in United States and charting in 13 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
Survivor!.io at a glance
AI summary written from our chart and store data. It can be wrong: check the numbers above.
Roguelite Cartoon 3D Modern short sessions IAP Ads
#zombie #survival #action #one-handed #horde #casual
Survivor!.io on the App Store
App details
Survivor!.io downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Where Survivor!.io's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
In-app revenue
Worldwide, what users spend in Survivor!.io before Apple and Google take their fee.
How this is calculated
Business model: In-app purchase-led
How Survivor!.io makes money: subscriptions, one-off purchases and ads.
Top in-app purchases · App Store US, most popular first
| 1 | Chapter Pack 1 | |
| 2 | Month Card 2 subscription | |
| 3 | Some Gems | |
| 4 | Chapter Pack 2 | |
| 5 | Pile of Gems | |
| 6 | Chapter Pack 3 | |
| 7 | Growth Fund | |
| 8 | Daily Pack 2 | |
| 9 | Small Piggy Bank | |
| 10 | Daily Pack 1 |
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Games › ActionGrossing | #39 | |
| Games › ActionFree | #30 | |
| Games › ActionFree | #16 | |
| Games › CasualGrossing | #46 | |
| Games › ActionGrossing | #47 | |
| Games › ActionGrossing | #31 | |
| Games › ActionGrossing | #48 | |
| GamesFree | #101 | |
| Games › ActionGrossing | #46 | |
| Games › ActionFree | #153 | |
| Games › CasualFree | #54 | |
| Games › CasualGrossing | #66 | |
| Games › ActionGrossing | #49 | |
| Games › ActionGrossing | #52 | |
| Games › ActionGrossing | #53 | |
| Games › ActionGrossing | #68 | |
| Games › ActionFree | #91 | |
| Games › CasualGrossing | #81 | |
| Games › ActionGrossing | #87 | |
| Games › ActionFree | #79 | |
| Games › ActionGrossing | #76 | |
| Games › ActionFree | #87 | |
| Games › ActionFree | #129 | |
| Games › ActionGrossing | #79 | |
| Games › ActionGrossing | #78 |
Apps near Survivor!.io on the chart
Games › Action Grossing, around #39.
Ratings
App Store, worldwide.
Review momentum
ⓘ How we measure thisGrowing fastest in
United Kingdom ▲ +120% ·
France ▲ +86%
New ratings by country (11)
| Country | New ratings a week | Share | Last 2 weeks vs the 2 before |
|---|---|---|---|
| 88 | 41% | ▼ -39% | |
| 84 | 39% | ▼ -30% | |
| 12 | 5% | steady | |
| 6.5 | 3% | ▼ -25% | |
| 6.5 | 3% | ▼ -53% | |
| 6 | 3% | steady | |
| 4.5 | 2% | ▲ +86% | |
| 3.5 | 2% | ▲ +120% | |
| 2.8 | 1% | ▼ -14% | |
| 1.8 | 1% | – | |
| 1.2 | 1% | – |
App Store ratings in the countries we track, 4-week average.
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about Survivor!.io
From the 131 most recent App Store reviews in the US.
Mixed but leaning positive (73% of recent reviews give 4–5 stars). People like it for being fun, and its features and content. The main complaints are about ads, and price and subscriptions. Recent reviews are more negative than earlier ones.
What people like
- Fun: “This game is so addicting”
- Features & content: “To many levels but I like the challenge”
- Ads: “And I’ve had a total of about 4 ads”
- Ease of use: “I love this game at first it seemed hard and then once I learned how to play it so easy”
Common complaints
- Ads: “Ads are ruining the experience”
- Price & subscription: “Let’s you pay to not play it”
- Crashes & bugs: “The game keeps on glitching and I don't like it what it's doing😭😭😭😭😭😭😠😡😡😡😡😡😡😡😡😡🤬🤬🤬🤬🤬”
- Features & content: “An option to exit never appears no matter how long I wait”
About Survivor!.io
Awakened by the trial of dreams, you've no choice but to take on the heroic mantle of saving the city!
As a human warrior with unlimited potential, you and other survivors will have to pick up your weapons and battle these evil and dangerous zombies!
The horde far outnumbers you - any slip-up and you'll get caught in dire straits!
Faced with crisis, you must find a way to survive!
Features:
-Face off against 1000+ monsters at once and exterminate them!
-Clear the map with one-hand controls!
-All-new roguelite skill experience with unlimited combinations
-Feel the heat of each new stage with different difficulties
FaceBook:@Survivor.io
Contact Us: [email protected]
Latest updates
Store changes
What Survivor!.io changed on its store page: name, icon, screenshots, price, size, languages, requirements.
More from HABBY
Survivor.io Android
Survivor.io gets 5k+ downloads a day worldwide (AppInsider estimate, November 2026, rounded down to a band).
Survivor.io is #17 in Games › Adventure Grossing on Google Play in United States and charting in 19 of 23 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
Survivor.io at a glance
AI summary written from our chart and store data. It can be wrong: check the numbers above.
Roguelite Shooter Cartoon 3D Modern Post-Apocalyptic short sessions IAP Ads
#zombie #survival #one-handed #horde #roguelike #action
Survivor.io on Google Play
App details
Tech stack
Trackers and permissions of build v5.3.0, from the εxodus privacy report (CC BY-SA).
Survivor.io downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Where Survivor.io's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
In-app revenue
Worldwide, what users spend in Survivor.io before Apple and Google take their fee.
How this is calculated
Business model: In-app purchase-led
How Survivor.io makes money: subscriptions, one-off purchases and ads.
Top in-app purchases · App Store US, most popular first
| 1 | Chapter Pack 1 | |
| 2 | Month Card 2 subscription | |
| 3 | Some Gems | |
| 4 | Chapter Pack 2 | |
| 5 | Pile of Gems | |
| 6 | Chapter Pack 3 | |
| 7 | Growth Fund | |
| 8 | Daily Pack 2 | |
| 9 | Small Piggy Bank | |
| 10 | Daily Pack 1 |
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
Apps near Survivor.io on the chart
Games › Adventure Grossing, around #17.
Ratings
Google Play, worldwide.
Review momentum
ⓘ How we measure thisReview momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about Survivor.io
From the 200 most recent Google Play reviews in the US.
Users generally enjoy the addictive gameplay and fair free-to-play balance, often citing it as a good time-waster. However, significant complaints arise regarding technical bugs like progress loss and energy drain, alongside frustration with ad frequency and lack of tutorial guidance.
Mixed but leaning positive (71% of recent reviews give 4–5 stars). People like it for being fun, and few ads. The main complaints are about login and account problems, and ads. Recent reviews are more positive than earlier ones.
What people like
- Fun: “Soo fun soo eazy and lazy”
- Ads: “barely any ads and it's legit fun”
- Features & content: “that's for the high level $$$ teams”
- Price & subscription: “This game is very good and expensive to spend time”
Common complaints
- Login & account: “still you guy's can't fix gabby login”
- Ads: “Not actual an offline game as advertised”
- Crashes & bugs: “EDIT: It still keeps on crashing”
- Updates: “it is crashing frequently after the update”
About Survivor.io
Awakened by the trial of dreams, you've no choice but to take on the heroic mantle of saving the city!
As a human warrior with unlimited potential, you and other survivors will have to pick up your weapons and battle these evil and dangerous zombies!
The horde far outnumbers you - any slip-up and you'll get caught in dire straits!
Faced with crisis, you must find a way to survive!
Features:
-Face off against 1000+ monsters at once and exterminate them!
-Clear the map with one-hand controls!
-All-new roguelite skill experience with unlimited combinations
-Feel the heat of each new stage with different difficulties
Facebook:@Survivor.io
Contact Us: [email protected]
What's new in 5.3.1
- New Survivor progression feature – Matrix Squad coming soon.
- Added Castle Cards, Surprise Chain Packs and other events.
- Elaine and Venato Halloween outfits coming soon.
Store changes
What Survivor.io changed on its store page: name, icon, screenshots, price, size, languages, requirements.