Cover Page - shares	3 Months Ended
	Mar. 31, 2021	May 11, 2021
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2021
Document Quarterly Report	true
Document Transition Report	false
Entity Current Reporting Status	No
Entity Filer Category	Non-accelerated Filer
Entity Registrant Name	AppLovin Corporation
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001751008
Entity File Number	001-40325
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	45-3264542
Entity Address, Address Line One	1100 Page Mill Road
Entity Address, City or Town	Palo Alto
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94304
City Area Code	800
Local Phone Number	839-9646
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Class A common stock, par value $0.00003 per share
Trading Symbol	APP
Security Exchange Name	NASDAQ
Common Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		216,751,056
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		147,921,563