Apps like Gradus: paid online surveys

Here are some great alternatives to Gradus: paid online surveys by Gradus Research Plus :
Alpha Poll - Surveys for Cash
Alpha Poll - Surveys for Cash
★3.7
Eureka: Earn money for surveys
Eureka: Earn money for surveys
★4.5
Dollar Surveys - Paid Surveys
Dollar Surveys - Paid Surveys
★4.1
MultiPolls - Surveys on The Go
MultiPolls - Surveys on The Go
★4.5
Survey Rewards Cash Surveys
Survey Rewards Cash Surveys
★4.9
Poll Pay: Earn Money & Cash
Poll Pay: Earn Money & Cash
★4.4
Survey++ Take Survey, Get Paid
Survey++ Take Survey, Get Paid
★4.0
Appinio - Surveys for Rewards
Appinio - Surveys for Rewards
★4.2
Branded Surveys: Get Paid Cash
Branded Surveys: Get Paid Cash
★4.3
Surveys Space: Paid Surveys
Surveys Space: Paid Surveys
★3.8
CashKarma: Survey Rewards
CashKarma: Survey Rewards
★4.3
Survey Pop: Make money fast!
Survey Pop: Make money fast!
★4.5
Surveys Queen - Paid Surveys
Surveys Queen - Paid Surveys
★4.0
Qmee: Paid Survey Cash Rewards
Qmee: Paid Survey Cash Rewards
★4.3
Swagbucks Play Games + Surveys
Swagbucks Play Games + Surveys
★4.4
Prime Opinion: Survey for Cash
Prime Opinion: Survey for Cash
★4.5