Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue	$ 668,806	$ 299,331	$ 1,272,683	$ 559,509
Costs and expenses:
Cost of revenue	245,853	118,051	468,914	194,504
Sales and marketing	265,463	135,319	530,976	263,986
Research and development	77,462	29,702	138,338	48,814
General and administrative	45,050	15,170	88,012	25,980
Lease modification and abandonment of leasehold improvements	0	7,851	0	7,851
Total costs and expenses	633,828	306,093	1,226,240	541,135
Income (loss) from operations	34,978	(6,762)	46,443	18,374
Other income (expense):
Interest expense and loss on settlement of debt	(19,030)	(18,809)	(54,040)	(37,438)
Other income (expense), net	(1,570)	3,157	8,220	4,178
Total other income (expense)	(20,600)	(15,652)	(45,820)	(33,260)
Income (loss) before income taxes	14,378	(22,414)	623	(14,886)
Provision for (benefit from) income taxes	14	(703)	(3,166)	2,161
Net income (loss)	14,364	(21,711)	3,789	(17,047)
Add: Net loss attributable to noncontrolling interest	59	320	113	320
Net income (loss) attributable to AppLovin	14,423	(21,391)	3,902	(16,727)
Less: Net income attributable to participating securities	(1,128)	0	(807)	0
Net income (loss) attributable to common stock—Basic	13,295	(21,391)	3,095	(16,727)
Net income (loss) attributable to common stock—Diluted	$ 13,349	$ (21,391)	$ 3,137	$ (16,727)
Net income (loss) per share attributable to common stockholders:
Basic (in dollars per share)	$ 0.04	$ (0.10)	$ 0.01	$ (0.08)
Diluted (in dollars per share)	$ 0.04	$ (0.10)	$ 0.01	$ (0.08)
Weighted average common shares used to compute net income (loss) per share attributable to common stockholders:
Basic (in shares)	335,619,207	213,440,147	279,326,624	212,169,247
Diluted (in shares)	353,857,814	213,440,147	298,506,265	212,169,247