Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 2,793,104	$ 1,451,086	$ 994,104
Costs and expenses:
Cost of revenue	988,095	555,578	241,274
Sales and marketing	1,129,892	627,796	481,781
Research and development	366,402	180,652	44,966
General and administrative	158,699	66,431	31,712
Lease modification and abandonment of leasehold improvements	0	7,851	0
Extinguishments of acquisition-related contingent consideration	0	74,820	0
Total costs and expenses	2,643,088	1,513,128	799,733
Income (loss) from operations	150,016	(62,042)	194,371
Other income (expense):
Interest expense and loss on settlement of debt	(103,170)	(77,873)	(73,955)
Other income (expense), net	(535)	4,209	5,818
Total other expense	(103,705)	(73,664)	(68,137)
Income (loss) before income taxes	46,311	(135,706)	126,234
Provision for (benefit from) income taxes	10,973	(9,772)	7,194
Net income (loss)	35,338	(125,934)	119,040
Add: Net loss attributable to noncontrolling interest	108	747	0
Net income (loss) attributable to AppLovin	35,446	(125,187)	119,040
Less: Net income attributable to participating securities	(3,743)	0	(42,664)
Net income (loss) attributable to common stock—Basic	31,703	(125,187)	76,376
Net income (loss) attributable to common stock—Diluted	$ 31,879	$ (125,187)	$ 76,561
Net income (loss) per share attributable to common stockholders:
Basic (in dollars per share)	$ 0.10	$ (0.58)	$ 0.36
Diluted (in dollars per share)	$ 0.09	$ (0.58)	$ 0.36
Weighted average common shares used to compute net income (loss) per share attributable to common stockholders:
Basic (in shares)	324,836,076	214,936,545	210,937,147
Diluted (in shares)	342,763,632	214,936,545	212,365,429